EP0204319A1 - Matériau composite comportant des filaments courts d'alumine comme matière de renforcement et d'un alliage d'aluminium avec cuivre et magnésium comme matrice métallique - Google Patents

Matériau composite comportant des filaments courts d'alumine comme matière de renforcement et d'un alliage d'aluminium avec cuivre et magnésium comme matrice métallique Download PDF

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Publication number
EP0204319A1
EP0204319A1 EP86107539A EP86107539A EP0204319A1 EP 0204319 A1 EP0204319 A1 EP 0204319A1 EP 86107539 A EP86107539 A EP 86107539A EP 86107539 A EP86107539 A EP 86107539A EP 0204319 A1 EP0204319 A1 EP 0204319A1
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approximately
composite material
bending strength
matrix metal
alumina
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EP86107539A
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German (de)
English (en)
Inventor
Masahiro c/o Toyota Jidosha K.K. Kubo
Tadashi C/O Toyota Jidosha K.K. Dohnomoto
Atsuo C/O Toyota Jidosha K.K. Tanaka
Hidetoshi c/o Toyoda Autom. Loom Works Ltd. Hirai
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Toyota Motor Corp
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Toyota Motor Corp
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
    • C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
    • C22C49/04—Light metals
    • C22C49/06—Aluminium

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  • the present invention relates to a composite material made up from reinforcing fibers embedded in a matrix of metal, and more particularly relates to such a composite material utilizing alumina short fiber material as the reinforcing fiber material and aluminum alloy as the matrix metal.
  • the inventors of the present application have considered the above mentioned problems in composite materials which use such conventional aluminum alloys as matrix metal, and in particular have considered the particular case of a composite material which utilizes alumina short fibers as reinforcing fibers; since such. alumina short fibers, of the various reinforcing fibers used conventionally in the manufacture of a fiber reinforced metal composite material, have particularly high strength, and are exceedingly effective in improving the high temperature stability and strength.
  • the present inventors as a result of various experimental researches performed in order to determine what composition of the aluminum alloy to be used as the matrix metal for such a composite material is optimum, have discovered that an aluminum alloy having a content of copper and magnesium within certain limits, and containing substantially no silicon, nickel, zinc, and so forth is optimal as matrix metal.
  • the present invention is based on the knowledge obtained from the results of the various experimental researches carried out by the inventors of the present application, as will be detailed later in this specification.
  • a composite material comprising alumina short fibers embedded in a matrix of metal, the fiber volume proportion of said alumina short fibers being between approximately 5% and approximately 50%, and said metal being an alloy consisting essentially of between approximately 2% to approximately 6% of copper, between approximately 0.5% to approximately 4% of magnesium, and remainder substantially aluminum; and more preferably the fiber volume proportion of said alumina short fibers may be between approximately 5% and approximately 40%; more preferably the magnesium content of said aluminum alloy matrix metal may be between approximately 2% and approximately 4%; more preferably the fiber volume proportion of said alumina short fibers may be between approximately 5% and approximately 20%, in which case the copper content of said aluminum alloy matrix metal should be between approximately 3% and approximately 6%; or alternatively the fiber volume proportion of said alumina short fibers should be between approximately 30% and approximately 40%, in which case the copper content of said aluminum alloy matrix metal should be between approximately 2% and approximately 5%.
  • alumina short fibers which have high strength, and are exceedingly effective in improving the high temperature stability and strength of the resulting composite material
  • matrix metal there is used an aluminum alloy with a copper content of 2% to 6%, a magnesium content of 0.5% to 4%, and the remainder substantially aluminum, and the volume proportion of the alumina short fibers is from 5% to 50%, whereby, as is clear from the results of experimental research carried out by the inventors of the present application as will be described below, a composite material with superior mechanical characteristics such as strength can be obtained.
  • the volume proportion of alumina short fibers in a composite material according to the present invention may be set to be lower than the value required for such a conventional composite material, and therefore, since it is possible to reduce the amount of alumina short fibers used, the machinability and workability of the composite material can be improved, and it is also possible to reduce the cost of the composite material. Further, the characteristics with regard to wear on a mating member will be improved.
  • the strength of the aluminum alloy matrix metal is increased and thereby the strength of the composite material is improved, but that effect is not sufficient if the copper content is less than 2%, whereas if the copper content is more than 6% the composite material becomes very brittle, and has a tendency to rapidly disintegrate. Therefore the copper content of the aluminum alloy used as matrix metal in the composite material of the present invention is required to be in the range of from approximately 2% to approximately 6%, and preferably is required to be in the range of from approximately 3% to approximately 5%.
  • oxide radicals are normally present on the surface of such alumina short fibers used as reinforcing fibers, before they are incorporated into the composite material, and if magnesium, which has a strong tendency to form oxides, is included in the molten matrix metal, then it is considered by the present inventors that the magnesium will react with the oxide radicals on the surface of the alumina short fibers during the process of infiltrating the molten matrix metal into the interstices of the reinforcing alumina short fiber mass, and this magnesium will reduce the surface of the alumina short fibers, as a result of which the affinity of the molten aluminum alloy matrix metal and the alumina short fibers will be improved, and by this means the strength of the composite,material will be improved.
  • the magnesium content of the aluminum alloy used as matrix metal in the composite material of the present invention is required to be in the range of from approximately 0.5% to approximately 4%, and preferably is required to be in the range of from approximately 2% to approximately 4%.
  • the wear resistance of the composite material increases with the volume proportion of the alumina short fibers, but when the volume proportion of the alumina short fibers is in the range from zero to approximately 5% said wear resistance increases rapidly with an increase in the volume proportion of the alumina short fibers, whereas when the volume proportion of the alumina short fibers is in the range of at least approximately 5%, the wear resistance of the composite material does not very significantly increase with an increase in the volume proportion of said alumina short fibers. Therefore, according to one characteristic of the present invention, the volume proportion of the alumina short fibers is required to be in the range of from approximately 5% to approximately 50%, and preferably is required to be in the range of from approximately 5% to approximately 40%.
  • the preferable range for the copper content varies slightly depending upon the volume proportion of the alumina short fibers.
  • the copper content is desirably required to be in the range of from about 3% to about 6%
  • the copper content is desirably required to be in the range of from about 2% to about 5%.
  • the copper content of the aluminum alloy used as matrix metal of the composite material of the present invention has a relatively high value, if there are unevennesses in the concentration of the copper within the aluminum alloy, the portions where the copper concentration is high will be brittle, and it will not therefore be possible to obtain a uniform matrix metal or a composite material of good and uniform quality.
  • such a composite material of which the matrix metal is aluminum alloy of which the copper content is at least approximately 2% and is less than approximately 3.5% is subjected to liquidizing processing for from about 2 hours to about 8 hours at a temperature of from about 480°C to about 520°C, and is preferably further subjected to aging processing for about 2 hours to about 8 hours at a temperature of from about 150°C to 200°C, while on the other hand such a composite material of which the matrix metal is aluminum alloy of which the copper content is at least approximately 3.5% and is less than approximately 6.5% is subjected to liquidizing processing for from about 2 hours to about 8 hours at a temperature of from about 460°C to about 510°C, and is preferably further subjected to aging processing for about 2 hours to about 8 hours at a temperature of from about 150°C to 200°C.
  • the alumina short fibers in the composite material of the present invention may be either alumina alumina non continuous fibers or may be alumina continuous fibers cut to a determinate length. It is also desirable that the composition of the alumina short fibers should be from about 80% to about 100% Al203, remainder substantially Si02, and in this case the crystalline structure of the alumina fibers may be any of the alpha, gamma, and delta crystalline structures. Also, the fiber length of the alumina short fibers is preferably from approximately 10 microns to approximately 7 cm, and particularly is from approximately 10 microns to approximately 5 cm, and the fiber diameter is preferably approximately 1 micron to approximately 30 microns, and particularly is from approximately 1 micron to approximately 25 microns.
  • substantially aluminum means that, apart from-aluminum, copper and magnesium, the total of the inevitable metallic elements such as silicon, iron, zinc, manganese, nickel, titanium, and chromium included in the aluminum alloy used as matrix metal is not more than 1%, and each of said elements individually is not present to more than 0.5%.
  • the expression “remainder substantially Si02” means that apart from the A1203 and the Si02 forming the alumina short fibers other substances are present only as impurities.
  • the present inventors manufactured by using the high pressure casting method samples of various composite materials, utilizing as reinforcing material alumina fiber material of type "Saffil RF" (this is a trademark) made by ICI K.K., which were approximately 95% delta A1203 and remainder substantially Si02, and which had average fiber length 2 cm and average fiber diameter 3 microns, and utilizing as matrix metal Al-Cu-Mg type aluminum alloys of various compositions. Then the present inventors conducted evaluations of the bending strength of the various resulting composite material sample pieces.
  • alumina fiber material of type "Saffil RF" this is a trademark
  • a set of aluminum alloys designated as Al through A76 were.produced, having as base material aluminum and having various quantities of magnesium and copper mixed therewith, as shown in the appended Table 1; this was done by, in each case, introducing an appropriate quantity of substantially pure aluminum metal (purity at least 99%) and an appropriate quantity of substantially pure magnesium metal (purity at least 99%) into an alloy of approximately 50% aluminum and approximately 50% copper.
  • an appropriate number of alumina fiber material preforms were made by, in each case, subjecting a quantity of the above specified alumina fiber material to compression forming without using any binder. Each of these alumina fiber material preforms was, as schematically illustrated in perspective view in Fig.
  • an exemplary such preform is designated by the reference numeral 2 and the alumina fibers therein are generally designated as 1, about 36 x 100 x 16 mm in dimensions, and the individual alumina fibers 1 in said preform 2 were oriented substantially randomly in two dimensions, i.e. in the x-y plane parallel to the 36 x 100 mm face, and were overlapped in a two dimensionally random manner in the axis perpendicular to this plane. And the fiber volume proportion in each of said preforms 2 was approximately 30%.
  • each of these alumina fiber material preforms 2 was subjected to high pressure casting together with an appropriate quantity of one of the aluminum alloys Al through A76 described above, in the following manner.
  • the preform 2 was inserted into a stainless steel case 2a, as shown in Fig. 2; this stainless steel case 2a was a rectangular parallelopiped and was open at both its ends.
  • the preform 2 with the stainless steel case 2 were together heated up to a temperature of approximately 600°C, and then said preform 2 and its case 2a were placed within a mold cavity 4 of a casting mold 3, which itself had previously been preheated up to a temperature of approximately 250°C.
  • the results of these bending strength tests were as shown in the appended Table 2, and as summarized in the graphs of Fig. 4 and Fig. 5.
  • the numerical values in Table 2 indicate the bending strengths (in -kg/mm 2- ) of the composite material bending strength test pieces having as matrix metals aluminum alloys having percentage contents of copper and magnesium as shown along the upper edge and down the left edge of the table, respectively.
  • the graphs of Fig. 4 are based upon the data in Table 2, and show the relation between copper content and the bending strength (in kg/mm 2 ) of certain of the composite material test pieces, for percentage contents of magnesium fixed along the various lines thereof; and the graphs of Fig.
  • the bending strength values are generally very much higher than the typical bending strength of approximately 45 kg/mm 2 attained in the conventional art for a composite material using as matrix metal a conventionally so utilized aluminum alloy of JIS standard AC4C and using similar alumina short fiber material as reinforcing material; and in particular it will be appreciated that the bending strength of such a composite material whose matrix metal aluminum alloy has a copper content of from approximately 2% to approximately 6% and a magnesium content of from approximately 0.5% to approximately 4% is approximately between 1.4 and 1.7 times as great as that of such an abovementioned conventional composite material.
  • the copper content of said Al-Cu-Mg type aluminum alloy matrix metal should be in the range of from approximately 2% to approximately 6%, and particularly should be in the range of from approximately 2% to approximately 5.5%; and it is preferable that the magnesium content of said Al-Cu-Mg type aluminum alloy matrix metal should be in the range of from approximately 0.5% to approximately 4%, and particularly should be in the range of from approximately 2% to approximately 4%.
  • the present inventors manufactured further samples of various composite materials, again utilizing as reinforcing material the same alumina fiber material, and utilizing as matrix metal various Al-Cu-Mg type aluminum alloys, but this time employing a fiber volume proportion of approximately 40%. Then the present inventors again conducted evaluations of the bending strength of the various resulting composite material sample pieces.
  • each of said alumina fiber material preforms 2 now having a fiber volume proportion of approximately 40%, by contrast to the first set of preferred embodiments described above; these preforms 2 had substantially the same dimensions as the preforms 2 of the first set of preferred embodiments.
  • each of these alumina fiber material preforms 2 was subjected to high pressure casting while included in a stainless steel case, together with an appropriate quantity of one of the aluminum alloys described above, utilizing operational parameters substantially as before, and, after machining away the peripheral portions of the resulting solidified aluminum alloy masses and extraction from the cases, sample pieces of composite material which had alumina fiber material as reinforcing material and the appropriate one of the above described aluminum alloys as matrix metal were obtained. And the volume proportion of alumina fibers in each of the resulting composite material sample pieces was thus now approximately 40%.
  • the numerical values in Table 3 indicate the bending strengths (in kg/mm 2 ) of the composite material bending strength test pieces having as matrix metals aluminum alloys having percentage contents of copper and magnesium as shown along the upper edge and down the left edge of the table, respectively.
  • the graphs of Fig. 6 are based upon the data in Table 3, and show the relation between copper content and the bending strength (in kg/mm2) of certain of the composite material test pieces, for percentage contents of magnesium fixed along the various lines thereof; and the graphs of Fig. 7 are also based upon the data in Table 3, and similarly but contrariwise show the relation between magnesium content and the bending strength (in kg/mm 2 ) of certain of the composite material test pieces, for percentage contents of copper fixed along the various lines thereof.
  • Table 3 Fig. 6, and Fig. 7, as before, the values for magnesium content and for copper content are shown with their second decimal places rounded by rounding .04 downwards to .0 and .05 upwards to .1.
  • the bending strength values are generally very much higher than the typical bending strength of approximately 46 kg/mm2 attained in the conventional art for a composite material using as matrix metal a conventionally so utilized aluminum alloy of JIS standard AC4C and using similar alumina short fiber material as reinforcing material; and in particular it will be appreciated that the bending strength of such a composite material whose matrix metal aluminum alloy has a copper content of from approximately 2% to approximately 6% and a magnesium content of from approximately 0.5% to approximately 4% is approximately between 1.5 and 1.8 times as great as that of such an abovementioned conventional composite material.
  • the volume proportion of the reinforcing alumina fibers is approximately 40% as in the previous cases when said volume proportion was approximately 30%
  • the copper content of said Al-Cu-Mg type aluminum alloy matrix metal should be in the range of from approximately 2% to approximately 6%, and particularly should be in the range of from approximately 2% to approximately 5.5%
  • the magnesium content of said Al-Cu-Mg type aluminum alloy matrix metal should be in the range of from approximately 0.5% to approximately 4%, and particularly should be in the range of from approximately 2% to approximately 4%.
  • the volume proportion of alumina short fiber material is in the range of from 30% to 40% it is preferable for the copper content and the magnesium content to be within the abovementioned ranges.
  • the present inventors manufactured further samples of various composite materials, again utilizing as reinforcing material the same alumina fiber material, and utilizing as matrix metal various other Al-Cu-Mg type aluminum alloys,.but this time employing a fiber volume proportion of only approximately 10%. Then the present inventors again conducted evaluations of the bending strength of the various resulting composite material sample pieces.
  • a set of aluminum alloys designated as B1 through B30 were produced in the same manner as before, again having as base material aluminum and having various quantities of magnesium and copper mixed therewith, as shown in the appended Table 4.
  • an appropriate number of alumina fiber material preforms were as before made by, in each case, subjecting a quantity of the previously utilized type of alumina fiber material to compression forming without using any binder, each of said alumina fiber material preforms 2 now having a fiber volume proportion of approximately 10%, by contrast to the first set of preferred embodiments described above.
  • These preforms 2 had substantially the same dimensions as the preforms 2 of the first and second sets of preferred embodiments.
  • each of these alumina fiber material preforms 2 was subjected to high pressure casting in a stainless steel case together with an appropriate quantity of one of the aluminum alloys B1 through B30 described above, utilizing operational parameters substantially as before.
  • the solidified aluminum alloy mass with the preform 2 included therein was then removed from the casting mold, and the peripheral portion of said solidified aluminum alloy mass was machined away, leaving, after extraction from the stainless steel case, a sample piece of composite material which had alumina fiber material as reinfbrcing material and the appropriate one of the aluminum alloys Bl through B30 as matrix metal.
  • the volume proportion of alumina fibers in each of the resulting composite material sample pieces was thus now approximately 10%.
  • post processing steps were performed on the composite material samples, substantially as before.
  • the results of these bending strength tests were as shown in the appended Table 5, and as summarized in the graphs of Fig. 8 and Fig. 9.
  • the numerical values in Table 5 indicate the bending strengths (in kg/mm 2 ) of the composite material bending strength test pieces having as matrix metals aluminum alloys having percentage contents of copper and magnesium as shown along the upper edge and down the left edge of the table, respectively.
  • the graphs of Fig. 8 are based upon the data in Table 5, and show the relation between copper content and the bending strength (in kg/mm 2 ) of certain of the composite material test pieces, for percentage contents of magnesium fixed along the various lines thereof; and the graphs of Fig.
  • the bending strength values are generally very much higher than the typical bending strength of approximately 40 kg/mm2 attained in the conventional art for a composite material using as matrix metal a conventionally so utilized aluminum alloy of JIS standard AC4C and using similar alumina short fiber material as reinforcing material; and in particular it will be appreciated that the bending strength of such a composite material whose matrix metal aluminum alloy has a copper content of from approximately 2% to approximately 6% and a magnesium content of from approximately 2% to approximately 4% is approximately between 1.4 and 1.6 times as great as that of such an abovementioned conventional composite material.
  • the volume proportion of the reinforcing alumina fibers is approximately 10% as in the previous cases when said volume proportion was approximately 30% and said volume proportion was approximately 40%
  • the copper content of said Al-Cu-Mg type aluminum alloy matrix metal should be in the range of from approximately 2% to approximately 6%, and particularly should be in the range of from approximately 3% to approximately 6%; and it is preferable that the magnesium content of said Al-Cu-Mg type aluminum alloy matrix metal should be in the range of from approximately 2% to approximately 4%.
  • the present inventors manufactured by using the high pressure casting method samples of various composite materials, utilizing as reinforcing material the same alumina fiber material as utilized before. Then the present inventors conducted evaluations of the bending strength of the various resulting composite material sample pieces,
  • a set of aluminum alloys designated as B1 through B30 were produced in the same manner as in the third set of preferred embodiments described above, and thus the previously described Table 4 is applicable to this fourth set of preferred embodiments also.
  • an appropriate number of alumina fiber material preforms were made in the same manner as before, but each of the resulting alumina fiber material preforms 2 now having a alumina short fiber volume proportion of approximately 5%, by contrast to the first through the third sets of preferred embodiments described above.
  • These preforms 2 had substantially the same dimensions of about 38 x 100 x 16 mm as the preforms 2 of the first through the third sets of preferred embodiments described above, and as before in this case the alumina short fibers incorporated therein were oriented substantially randomly in planes parallel to their 38 mm x 100 mm faces, and had randomly overlapping orientation in the thickness direction orthogonal to these planes.
  • each of these alumina fiber material preforms was subjected to high pressure casting together with an appropriate quantity of one of the aluminum alloys B1 through B30 described above, utilizing operational parameters substantially as before.
  • the solidified aluminum alloy mass with the preform included therein was then removed from the casting mold, and the peripheral portion of said solidified aluminum alloy mass was machined away, leaving after extraction from the case a sample piece of composite material which had alumina fiber material as reinforcing material and the appropriate one of the aluminum alloys B1 through B30 as matrix metal.
  • the volume proportion of alumina fibers in each of the resulting composite material sample pieces was thus now approximately 5%.
  • post processing steps of liquidizing processing and artificial aging processing were performed on the composite material samples, substantially as before.
  • the results of these bending strength tests were as shown in the appended Table 6, and as summarized in the graphs of Fig. 10 and Fig. 11.
  • the numerical values in Table 6 indicate the bending strengths (in Kg/mm 2 ) of the composite material bending strength test pieces having as matrix metals aluminum alloys having percentage contents of copper and magnesium as shown along the upper edge and down the left edge of the table, respectively.
  • the graphs of Fig. 10 are based upon the data in Table 6, and show the relation between copper content and the bending strength (in kg/mm 2 ) of certain of the composite material test pieces, for percentage contents of magnesium fixed along the various lines thereof; and the graphs of Fig.
  • the bending strength values are generally very much higher than the typical bending strength of approximately 38 kg/mm 2- attained in the conventional art for a composite material using as matrix metal a conventionally so utilized aluminum alloy of JIS standard AC4C and using similar alumina short fiber material as reinforcing material; and in particular it will be appreciated that the bending strength of such a composite material whose matrix metal aluminum alloy has a copper content of from approximately 2% to approximately 6% and a magnesium content of from approximately 2% to approximately 4% is approximately between 1.4 and 1.6 times as great as that of such an abovementioned conventional composite material.
  • the present inventors manufactured further samples of various composite materials, now utilizing as reinforcing material a different type of alumina fiber material from the first through the fourth sets of preferred embodiments described above, and utilizing as matrix metal various Al-Cu-Mg type aluminum alloys, but this time employing a fiber volume proportion of approximately 15%. Then the present inventors again conducted evaluations of the bending strength of the various resulting composite material sample pieces.
  • alumina fiber material preforms were made by, in each case, subjecting a quantity of alumina fiber material of type "Arusen” manufactured by Denki Kagaku Kogyo KK, which were approximately 80% alpha A1203 and remainder substantially Si02, and had average fiber length about 2 cm and average fiber diameter about 2 microns, to compression forming as in the case of the previous sets of embodiments, each of said alumina fiber material preforms 2 now having a fiber volume proportion of approximately 15%, by contrast to the other sets of preferred embodiments described above; these preforms 2 had substantially the same dimensions as the preforms 2 of the previously described sets of preferred embodiments, and the same type of random two dimensional fiber orientation.
  • each of these alumina fiber material'preforms 2 was subjected to high pressure casting together with an appropriate quantity of one of the aluminum alloys described above, utilizing operational parameters substantially as before, and, after machining away the peripheral portions of the resulting solidified aluminum alloy masses and removing the stainless steel cases, sample pieces of composite material which had alumina fiber material as reinforcing material and the appropriate one of the above described aluminum alloys as matrix metal were obtained.
  • the numerical values in Table 7 indicate the bending strengths (in kg/mm2-) of the composite material bending strength test pieces having as matrix metals aluminum alloys having percentage contents of copper and magnesium as shown along the upper edge and down the left edge of the table, respectively.
  • the graphs of Fig. 12 are based upon the data in Table 7, and show the relation between copper content and the bending strength (in kg/mm2) of certain of the composite material test pieces, for percentage contents of magnesium fixed along the various lines thereof; and the graphs of Fig.
  • the volume proportion of the reinforcing alumina fibers is approximately 15% as in the previous cases, in order to increase the strength of such a composite material having .
  • such alumina fiber reinforcing fiber material and having as matrix metal an Al-Cu-Mg type aluminum alloy it is again preferable that the copper content of said Al-Cu-Mg type aluminum alloy matrix metal should be in the range of from approximately 2% to approximately 6%, and particularly should be in the range of from approximately 3% to approximately 6%; and it is preferable that the magnesium content of said Al-Cu-Mg type aluminum alloy matrix metal should be in the range of from approximately 2% to approximately 4%.
  • the present inventors manufactured further samples of various composite materials, again utilizing as reinforcing material the same alumina fiber material as in the fifth set of preferred embodiments described above, and utilizing as matrix metal various Al-Cu-Mg type aluminum alloys, but this time employing a fiber volume proportion of approximately 20%. Then the present inventors again conducted evaluations of the bending strength of the various resulting composite material sample pieces.
  • alumina fiber material preforms were made as before by, in each case, subjecting a quantity of the same type of alumina fiber material as utilized in the fifth set of preferred embodiments to compression forming as described with regard to said fifth set of preferred embodiments, each of said alumina fiber material preforms 2 now having a fiber volume proportion of approximately 20% by contrast to said fifth set of preferred embodiments; these preforms 2 had substantially the same dimensions as the preforms 2 of the fifth set of preferred embodiments, and the same type of fiber orientation.
  • each of these alumina fiber material preforms 2 was subjected to high pressure casting in a stainless steel case together with an appropriate quantity of one of the aluminum alloys described above, utilizing operational parameters substantially as before, and, after machining away the peripheral portions of the resulting solidified aluminum alloy masses, and removing the cases, sample pieces of composite material which had alumina fiber fiber material as reinforcing material and the appropriate one of the above described aluminum alloys as matrix metal were obtained. And the volume proportion of alumina fibers in each of the resulting composite material sample pieces was thus now approximately 20%.
  • the numerical values in Table 8 indicate the bending strengths (in kg/mm 2 ) of the composite material bending strength test pieces having as matrix metals aluminum alloys having percentage contents of copper and magnesium as shown along the upper edge and down the left edge of the table, respectively.
  • the graphs of Fig. 14 are based upon the data in Table 8, and show the relation between-copper content and the bending strength (in kg/mm2) of certain of the composite material test pieces, for percentage contents of magnesium fixed along the various lines thereof; and the graphs of Fig. 15 are also based upon the data in Table 8, and similarly but contrariwise show the relation between magnesium content and the bending strength (in kg/mm 2 ) of certain of the composite material test pieces, for percentage contents of copper fixed along the various lines thereof.
  • the values for magnesium content and for copper content are shown with their second decimal places rounded by rounding .04 downwards to .0 and .05 upwards to .1.
  • the volume proportion of the reinforcing alumina fibers is approximately 20% as in the previous cases, in order to increase the strength of such a composite material having such alumina fiber reinforcing fiber material and having as matrix metal an Al-Cu-Mg type aluminum alloy, it is again preferable that the copper content of said Al-Cu-Mg type aluminum alloy matrix metal should be in the range of from approximately 2% to approximately 6%, and particularly should be in the range of from approximately 3% co approximately 6%; and it is preferable that the mag esium content of said Al-Cu-Mg type aluminum alloy mat:ix metal should be in the range of from approximately 2% co approximately 4%.
  • the copper content of the aluminum alloy matrix metal should be from approximately 2% to approximately 6%; and that it is even more preferable that said copper content of the aluminum alloy matrix metal should be from approximately 3% to approximately 6%.
  • the copper content of the Al-Cu-Mg type aluminum alloy matrix metal is in the range of from approximately 2% to approximately 6%, and that it is preferable that the magnesium content of said Al-Cu-Mg type aluminum alloy matrix metal to be in the range of from approximately 2% to approximately 4%, it is now germane to provide a set of tests to establish what fiber volume proportion of the reinforcing alumina short fibers is most appropriate.
  • an appropriate number of alumina fiber material preforms were as before made by, in each case, subjecting a quantity of the type of alumina fiber material utilized in the case of the first set of preferred embodiments described above to compression forming without using any binder, the various ones of said alumina fiber material preforms having fiber volume proportions of approximately 0%, 5%, 10%, 15%, 30%, 40%, and 50%. These preforms had substantially the same dimensions and the same type of three dimensional random fiber orientation as the preforms of the first set of preferred embodiments. And, substantially as before, each of these alumina fiber material preforms was subjected to high pressure casting together with an appropriate quantity of one of the aluminum alloy matrix metal described above, utilizing operational parameters substantially as before.
  • the solidified aluminum alloy mass with the preform included therein was then removed from the casting mold, and as before the peripheral portion of said solidified aluminum alloy mass was machined away, leaving after case removal a sample piece of composite material which had alumina fiber material as reinforcing material in the appropriate fiber volume proportion and the described aluminum alloy as matrix metal.
  • post processing steps were performed on the composite material samples, similarly to what was done before: the composite material samples were subjected to liquidizing processing at a temperature of approximately 500°C for approximately 8 hours, and then were subjected to artificial aging processing at a temperature of approximately 160°C for approximately 8 hours.
  • the fiber volume proportion of the alumina short fiber reinforcing material should be in the range of from approximately 5% to approximately 50%, and more preferably should be in the range of from approximately 5% to approximately 40%.

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EP86107539A 1985-06-04 1986-06-03 Matériau composite comportant des filaments courts d'alumine comme matière de renforcement et d'un alliage d'aluminium avec cuivre et magnésium comme matrice métallique Withdrawn EP0204319A1 (fr)

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JP120787/85 1985-06-04
JP12078785A JPS61279646A (ja) 1985-06-04 1985-06-04 アルミナ短繊維強化アルミニウム合金

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0235574A2 (fr) * 1986-01-31 1987-09-09 Toyota Jidosha Kabushiki Kaisha Matériau composite comportant des fibres courtes alumine-silice comme matériau de renforcement et une matrice métallique d'un alliage d'aluminium avec des teneurs en cuivre et en magnésium peu élevées
EP0313271A1 (fr) * 1987-10-20 1989-04-26 Alcan International Limited Matrice composite métallique à renforcement sans silicium préformé
FR2639360A1 (fr) * 1988-11-21 1990-05-25 Peugeot Procede de fabrication d'un materiau composite a matrice metallique, et materiau obtenu par ce procede
US5106702A (en) * 1988-08-04 1992-04-21 Advanced Composite Materials Corporation Reinforced aluminum matrix composite
US5421087A (en) * 1989-10-30 1995-06-06 Lanxide Technology Company, Lp Method of armoring a vehicle with an anti-ballistic material
RU2755353C1 (ru) * 2020-10-20 2021-09-15 Юлия Анатольевна Курганова Композиционный материал на основе алюминия или алюминиевого сплава и способ его получения
CN114737140A (zh) * 2022-04-14 2022-07-12 广东合拓新材料科技有限公司 一种抗拉强度高的铝单板材料及其制备方法

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JPS6277433A (ja) * 1985-09-30 1987-04-09 Toyota Motor Corp アルミナ−シリカ系短繊維強化アルミニウム合金

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EP0074067A1 (fr) * 1981-09-01 1983-03-16 Sumitomo Chemical Company, Limited Procédé pour la fabrication d'un matériau composite renforcée par des fibres

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0235574A2 (fr) * 1986-01-31 1987-09-09 Toyota Jidosha Kabushiki Kaisha Matériau composite comportant des fibres courtes alumine-silice comme matériau de renforcement et une matrice métallique d'un alliage d'aluminium avec des teneurs en cuivre et en magnésium peu élevées
EP0235574B1 (fr) * 1986-01-31 1990-10-10 Toyota Jidosha Kabushiki Kaisha Matériau composite comportant des fibres courtes alumine-silice comme matériau de renforcement et une matrice métallique d'un alliage d'aluminium avec des teneurs en cuivre et en magnésium peu élevées
EP0313271A1 (fr) * 1987-10-20 1989-04-26 Alcan International Limited Matrice composite métallique à renforcement sans silicium préformé
US5106702A (en) * 1988-08-04 1992-04-21 Advanced Composite Materials Corporation Reinforced aluminum matrix composite
FR2639360A1 (fr) * 1988-11-21 1990-05-25 Peugeot Procede de fabrication d'un materiau composite a matrice metallique, et materiau obtenu par ce procede
EP0375473A1 (fr) * 1988-11-21 1990-06-27 Automobiles Peugeot Procédé de fabrication d'un matériau composite à matrice métallique, et matériau obtenu par ce procédé
US5421087A (en) * 1989-10-30 1995-06-06 Lanxide Technology Company, Lp Method of armoring a vehicle with an anti-ballistic material
RU2755353C1 (ru) * 2020-10-20 2021-09-15 Юлия Анатольевна Курганова Композиционный материал на основе алюминия или алюминиевого сплава и способ его получения
CN114737140A (zh) * 2022-04-14 2022-07-12 广东合拓新材料科技有限公司 一种抗拉强度高的铝单板材料及其制备方法
CN114737140B (zh) * 2022-04-14 2023-01-24 广东合拓新材料科技有限公司 一种抗拉强度高的铝单板材料及其制备方法

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AU588324B2 (en) 1989-09-14
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