JPH01279719A - Manufacture of metal-based composite material - Google Patents

Abstract

PURPOSE:To easily manufacture the title material without pressurizing the molten metal of Al, Mg or the like by regulating inorganic fiber, whisker, grains, etc., except metals as a reinforcing material and immersing a molded body constituted of the fine pieces of specific metals, metal oxide and metal fluoride into the above molten metal. CONSTITUTION:An inorganic material except metals such as Al2O3 short fiber, SiC whisker and Si3N4 grains is regulated as a reinforcing material 10. A molded body 10 constituted of the fine pieces 13 of Ni, Fe, Co, Cr, Mn, Cu, Ag, Si, Mg, Al, Zn, Pb, Ti and Nb and the alloys consisting essentially of the above metals, with the ratio of >=1% for the reinforcing material 10, and the fine pieces 14 of the oxide such as Al2O3, ZrO2, Fe2O3, CeO2, TiO2, SnO, Cr2O3 and SiO2, with the ratio of >=1% for the material 10, and the fine pieces 15 of metal fluoride contg. alkaline metals, alkaline-earth metals and rare-earth metals, with the ratio of >=0.02% for the material 10, is immersed into the molten metal 18 of Al, Mg and their alloys. The molten metal of the Al alloy penetrates into the molded body 10 and is solidified, by which the metal-based reinforcing composite material contg. Al alloy, etc., as a matrix can easily be manufactured without pressurizing the molten metal 18.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a composite material, and more particularly, a composite material made of a metal base material having a reinforcing material such as an inorganic fiber other than a metal such as a ceramic fiber, and a matrix of an aluminum alloy or the like. Relating to a method for manufacturing composite materials.

Problems to be solved by conventional techniques and inventions For example, the "Aluminum "Forming of composite materials (FRM)"
As described in the booklet entitled, ■
Diffusion bonding method, ■Plasma spray method, ■Vapor phase deposition method,
■Melt infiltration method, ■? ll! There are various methods such as plating method, etc.
It is known that methods for manufacturing fiber-reinforced metal composite materials in which the reinforcing fibers are discontinuous fibers include ■powder metallurgy, ■compocasting, ■molten metal forging, ■semi-molten processing, and ■HIP. ing.

Especially when the reinforcing fibers are discontinuous fibers, the molten metal forging method (high-pressure casting method) mentioned above has been generally adopted since it is superior in mass production compared to the other methods mentioned above. has been done. However, in the molten metal forging method, the molten matrix metal must be pressurized to very high pressures, which requires large-scale production equipment, which makes the production of composite materials expensive; This is one of the major impediments to the practical application of the material.

Thus, in the production of composite materials when the reinforcing fibers are short fibers, there is a need to reduce the necessary pressure on the molten matrix metal, and even to omit the pressure. In order to achieve this, it is necessary to significantly improve the wettability between the reinforcing fibers and the molten matrix metal.

In view of this demand, for example, Japanese Patent Laid-Open No. 61-295344 proposes the use of an aluminum alloy to which a special element is added as a matrix metal. However, there is a problem in that sufficient wettability cannot be ensured simply by adding a special element to the matrix metal, and the composition of the matrix metal is limited to a specific one.

Furthermore, in the case where the reinforcing fibers are continuous fibers, various methods have been proposed to improve the wettability of the fibers with respect to the molten metal of the matrix metal.
Publication No. 42504 describes a method of applying metal powder to the surface of fibers to improve wettability.
JP-A-50-109904, JP-A-52-28433
No., JP-A-53-38791, JP-A-57-1690
No. 36 and Japanese Unexamined Patent Publication No. 57-169037 describe a method of coating the surface of fibers with a metal to thereby improve wettability.

As described in these publications, when the reinforcing fibers are continuous fibers, the fibers are generally oriented in one direction, so the molten matrix metal penetrates between the individual continuous fibers due to capillary action. Accordingly, the above method can improve the wettability between the fibers and the molten matrix metal.

However, when the reinforcing fibers are short fibers or whiskers, since they are discontinuous, penetration of the molten matrix metal by capillary action cannot be expected. As described in , simply applying methods known to improve the wettability of continuous fibers to short fibers and whiskers cannot sufficiently improve their wettability. Further, when the reinforcing fibers are short fibers or whiskers, it is difficult to cover them with a large amount of metal or apply a large amount of metal powder, and the cost is extremely high. These problems also occur when the surface of the fiber is coated with a metal oxide as described in US Pat. No. 4,376.803 and US Pat. No. 4,569,886.

In addition, Japanese Patent Application Laid-open No. 5
As described in Japanese Patent Application Laid-open No. 7-31466 and Japanese Patent Application Laid-Open No. 62-67133, there is a method in which a reinforcing material molded body is preheated to a predetermined temperature, and then a molten matrix metal is infiltrated into the molded body under pressure. Are known. According to this method, the wettability of the matrix metal with the molten metal is improved by heating the reinforcing material itself to a temperature at which the reinforcing material itself is heated, and the permeability of the matrix metal with the molten metal is improved compared to the case where the molded body is not preheated. . However, in these methods, it is essential to preheat the molded body, and special means are required for that purpose, so these methods also have limitations in streamlining and reducing the cost of manufacturing composite materials. There is.

In addition, Japanese Patent Application Laid-open No. 6, filed by the same applicant as the applicant
As described in Japanese Patent Application No. 1-165265, the reinforcing material is formed by utilizing the oxidation-reduction reaction between the metal oxide contained in the molded material of the reinforcing material and the specific metal element in the matrix metal. Methods are known to improve the permeability of molten matrix metal into the body. However, this method has a problem in that it is not possible to produce a composite material in which the matrix metal is a metal of an arbitrary composition because the elements that undergo redox reactions with each other are limited.

Furthermore, in any of the above-mentioned conventional methods, it is essential to pressurize the molten matrix metal to a relatively high pressure, and therefore, depending on these conventional methods, pressurization of the molten matrix metal may be omitted or However, it is not possible to efficiently manufacture composite materials at a low location by omitting the use of molds, etc. required for pressurization, and a relatively large amount of matrix metal is produced in areas other than the molded body in the mold during each casting. There is a problem in that the yield cannot be improved because it is inevitable that the particles will solidify.

Also, Special Publication No. 59-500973 and April 1985
Journal or Materials published in month
5clence Letters describes a method for producing a composite material in which a reinforcing fiber molded body is pretreated with a fluorine-containing reagent and the molded body is impregnated with a molten matrix metal. However, in this method, the reinforcing fibers are limited to those whose main component is carbon or carbide, or whose surface is coated with carbon or carbide, and the processed molded body must be preheated before being impregnated with the molten matrix metal. The problem is that it is necessary to do so.

In view of the above-mentioned problems in conventional composite material manufacturing methods, the inventors of the present application have conducted various experimental studies, and have found that:
The various problems described above can be solved by mixing fine pieces of metal oxide, fine pieces of metal oxide, and fine pieces of metal fluoride into a molded body of an inorganic reinforcing material other than metal. I found out.

The present invention is based on the knowledge obtained as a result of various experimental studies conducted by the inventors of the present invention, and is based on the knowledge obtained as a result of various experimental studies conducted by the inventors of the present invention. The purpose is to provide a method that can efficiently and inexpensively manufacture materials.

Furthermore, the present invention can produce a composite material having a substantially predetermined shape and size very efficiently and without using a mold for pressurizing a molten matrix metal or a mold for manufacturing a composite material having a predetermined shape. The objective is to provide a method that allows devices to be manufactured with very high yields.

Means for Solving the Problems According to the present invention, an inorganic reinforcing material other than metal, fine pieces of metal, fine pieces of metal oxide,
a molded body containing fine pieces of metal fluoride, and at least a part of the molded body is made of Al, Mg, A1 alloy, and Mg.
This is achieved by a method for producing a metal matrix composite material, in which the metal matrix composite material is brought into contact with a molten metal of a matrix metal selected from the group consisting of alloys, and the molten metal is infiltrated into the molded body without substantially applying pressure.

Effects and Effects of the Invention According to the method of the present invention, a molded body containing an inorganic reinforcing material other than metal, fine pieces of metal, fine pieces of metal oxide, and fine pieces of metal fluoride is formed, and the molding At least a portion of the body is brought into contact with a molten matrix metal. Metal fluoride removes the oxide film of the molten matrix metal to improve the wetting of the molten metal to the reinforcing material, and also removes the oxide film on the surface of the fine metal pieces to improve the wetting of the molten metal to the fine metal pieces. In addition, the oxide film on the surface of the fine metal pieces is removed to improve wetting between the molten metal and the fine metal pieces, and the molten metal permeates into the compact through the fine metal pieces.

Also, some of the metal fluorides react with some of the metal oxides,
Activate this.

The thus activated molten matrix metal and the fine pieces of metal oxide react with each other to generate heat.
The heat heats the molten metal and the reinforcing material, thereby improving the permeability of the molten metal into the molded body and the wettability of the reinforcing material, thereby allowing the molten metal of the matrix metal to satisfactorily permeate throughout the molded body.

Therefore, according to the method of the present invention, there is no need to pressurize the molten matrix metal or preheat the reinforcing material, and therefore, there is no need for extensive equipment for pressurizing the molten matrix metal or preheat the reinforcing material. Composite materials in which matrix metal is well filled between individual reinforcing materials can be produced more efficiently and at lower cost than conventional methods.

Further, according to the method of the present invention, as described above, the molten metal of the matrix metal and the fine pieces of the metal oxide are activated by the metal fluoride, so that the metal oxide is It is not limited to specific metal oxides as described in Japanese Patent Application No. 1983 and Japanese Patent Application No. 1983.

Furthermore, according to the method of the present invention, as described above, the molten metal of the matrix metal satisfactorily penetrates into the molded body, so that the molded body containing the reinforcing material, fine pieces of metal oxide, and fine pieces of metal fluoride can be formed. If a part of the molded body is formed into a predetermined shape and size and a part of it is brought into contact with the molten matrix metal, the molten matrix metal will quickly permeate the entire molded body in just the right amount, thereby substantially forming the predetermined shape. A composite material of and dimensions is formed. Therefore, a mold is required to pressurize the molten matrix metal and define a predetermined product shape, and a large amount of the matrix metal inevitably solidifies in parts of the mold other than the composite material. Compared to forging method etc.
Composite materials of substantially predetermined shapes and dimensions can be produced efficiently and at low levels with very high yields.

According to the results of experimental research conducted by the inventors of the present application, if a molded body contains fine metal pieces, metal oxide fine pieces, and metal fluoride fine pieces, the molten metal of the matrix metal Although it can improve the permeability into the molded object,
The weight ratio of the fine pieces of metal to the reinforcing material is 1% or more, the weight ratio of the fine pieces of metal oxide to the reinforcing material is 1% or more, and the weight ratio of the fine pieces of metal fluoride to the reinforcing material is 0. When the content is .02% or more, the molten metal of the matrix metal can satisfactorily penetrate into the molded body. According to one detailed feature of the invention, therefore, the amount of metal fines in the compact is set at 1% or more by weight relative to the reinforcing material, and The amount is set to 1% or more in terms of weight ratio to the reinforcing material, and the amount of metal fluoride fine particles in the molded body is set to 0.02% or more in terms of weight ratio to the reinforcing material.

Further, in the method of the present invention, the metal fluoride may be a fluoride of any metal element, but for example, 2 ZrF6
, K2TiF6 , KAlF4 , K3AlF6
, K2 AlF3 ・H20, Cs AIF 4
, CsAlF3 .H20, a fluoride containing Ti, a transition metal such as Zr5HfSV, Nb5Ta, or A1 combined with an electrically positive element such as an alkali metal, an alkaline earth metal, or a rare earth metal. According to another detailed feature of the invention, therefore, the metal fluoride is a transition metal or A in combination with an electrically positive metal element.
It is a fluoride containing I.

Further, in the method of the present invention, the metal fine pieces may be made of any metal, but in particular Ni1Fex 00
%Cr, Mn5Cu, Ag5St, Mg, Al% Z
It is preferable that the material is made of n, Sns, Pbs, TtSNbs, or an alloy containing these as main components. According to another detailed feature of the invention, therefore, the metal particles are Ni, Fe5Co.

Cr, Mn, Cu, Ag, S is Mg, A 1%
Zn % Sn s P b s T t % N b
These are fine pieces of metal selected from the group consisting of s and alloys containing these as main components.

Further, in the method of the present invention, the reinforcing material may be in any form, but the method of the present invention uses short fibers, whiskers, particles, or their like, rather than the case where the reinforcing material is long fibers. This is particularly useful when the mixture is a mixture. According to yet another detailed feature of the invention, therefore, the reinforcing material is selected from the group consisting of short fibers, whiskers, particles and mixtures thereof.

Also, according to the results of experimental research conducted by the inventors of the present application,
Even if the total volume fraction of reinforcing material, fine metal pieces, fine metal oxide pieces, and fine metal fluoride pieces in the molded body is too low or too high, the molten metal of the matrix metal cannot be mixed into the molded body. It becomes difficult to penetrate well. According to yet another detailed feature of the invention, the reinforcing material in the molded body,
The total volume fraction of fine metal pieces, metal oxide fine pieces, and metal fluoride fine pieces is 4 to 90%, preferably 5 to 90%.
It is set to 85%.

Also, according to the results of experimental research conducted by the inventors of the present application,
Even if the volume fraction of fine metal pieces, metal oxide fine pieces, and metal fluoride fine pieces contained in the molded body is high, the molten metal of the matrix metal can be well penetrated into the molded body. However, as the amount of these increases, the volume fraction of the reinforcing material decreases relatively, and depending on the type of reinforcing material, the composition of the matrix metal changes greatly.

Therefore, according to yet another detailed feature of the present invention, the volume fraction of the metal fine pieces in the molded body is preferably set to 85% or less, and the volume fraction of the metal oxide fine pieces in the molded body is preferably set to 85% or less. is set to 45% or less, preferably 40% or less, and the volume fraction of metal fluoride fine pieces is set to 30% or less, preferably 20% or less.
% or less.

According to yet another detailed feature of the invention, the molded body has a predetermined shape and dimensions, and only a portion thereof is immersed in the molten metal of the matrix metal.

According to this method, a composite material of a predetermined shape and size can be efficiently produced at a very high yield without pressurizing a molten matrix metal or using a mold to define a predetermined product shape. It can be manufactured into a device.

In the method of the present invention, it is not necessary to preheat the molded body, but when preheating the molded body to improve the wettability of the reinforcing material and fine pieces of metal oxide, the temperature is lower than that of the conventional method. Preferably, the temperature is lower than that employed. Further, the fine metal pieces, metal oxide fine pieces, and metal fluoride fine pieces in the present invention may be in any form such as short fibers, whiskers, or powder.

In addition, the specification of Japanese Patent Application No. 1983 filed by the applicant on the same date as the present application describes a method for manufacturing a composite material in which fine pieces of metal fluoride are mixed into a molded body of reinforcing material. 63= and the specifications of Japanese Patent Application No. 1983-1, there is a method for producing a composite material in which fine pieces of metal oxide are mixed into a reinforcing material molded body. 63-
Each statement in the issue discloses a method of producing a composite material that contains a microscopic piece of metal oxide and a metal fluoride in the molded body of the reinforced material.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention will be explained in detail below by way of example embodiments with reference to the accompanying figures.

Example 1 As a reinforcing material, short alumina fibers with an average fiber diameter of 3 μm and an average fiber length of 1 cm (“Saphir RGJ, 95% A
l2O3, 5% S I O2), fiber diameter 0.1~ko,
0 μm, fiber length 50-200 tttn silicon carbide whiskers (manufactured by Tokai Carbon Co., Ltd.), average particle size 10 μm
Prepare silicon nitride particles (manufactured by Kojundo Kagaku Co., Ltd.),
In addition, metal fibers and metal powders shown in Table 1 below were prepared as fine metal pieces.

Next, ■ the above-mentioned reinforcing material, the above-mentioned metal fiber or metal powder,
Oxides (A1203, ZrO2, Fe2O3, CeO
2, TiO2, 5nO1Cr203, SiC2) sol (manufactured by Nissan Chemical Co., Ltd.), compression molding the mixture, drying the molded bodies, and then molding each molded body at a concentration of 13 g/100 cc. 2ZrF at 90℃
6. 2ZrF6 is finely recrystallized in the molded body by immersing it in an aqueous solution and cooling the aqueous solution to about 40°C,
A molded body was formed from the reinforcing material, fine pieces of the metal, fine pieces of the metal oxide, and fine pieces of the metal fluoride.

In addition, ■ the above reinforcing material, the above metal fiber or metal powder, KAlF4 powder (manufactured by Furukawa Electric Co., Ltd.) with an average diameter of 20 μm and an average length of 100 μl, and Ta20 with an average particle size of 1.5 μm.
5 powder (manufactured by Mitsui Kinzoku Co., Ltd.), Nb with an average particle size of 5 μn
205 powder (manufactured by Mitsui Kinzoku Co., Ltd.), PbO powder with a particle size of 1 to 2 μm (manufactured by Kojundo Kagaku Co., Ltd.), average particle size of 5 μm
■205 powder (manufactured by Kojundo Kagaku Co., Ltd.), average particle size 6
μm Bi2O3 powder (manufactured by Kojundo Kagaku Co., Ltd.), ZnO powder (manufactured by Kojundo Kagaku Co., Ltd.) with an average particle size of 10 μm,
M n O2 powder with a particle size of 1 to 2 μm (manufactured by Kojundo Kagaku Co., Ltd.), B2O3 powder with an average particle size of 43 μm (manufactured by Kojundo Kagaku Co., Ltd.), M n O3 powder with an average particle size of 3 μm (manufactured by Japan Shinkin Metal Co., Ltd.) company), WO with an average particle size of 0.55 μl
3 powder (manufactured by Japan New Metals Co., Ltd.), Co3O4 powder with an average particle size of 74 μm (manufactured by Sumitomo Metal Mining Co., Ltd.), NiO powder with an average particle size of 1.6 μl (manufactured by Sumitomo Metal Mining Co., Ltd.),
MgO powder (manufactured by Ube Industries, Ltd.) with an average particle size of 0.05 μm is mixed in water, the mixture is compression molded, and the molded product is dried to form the reinforcing material and the fine particles of the above metal. A molded body consisting of a piece, a fine piece of the metal oxide, and a fine piece of the metal fluoride was formed.

FIG. 1 is a perspective view showing an example of the molded body 10 thus formed, in which 12 is a reinforcing material, 13 is a metal fine piece, 14 is a metal oxide fine piece, and 15 is a metal oxide fine piece. 1 and 2 respectively indicate fine pieces of metal fluoride. In this case, the volume fractions of alumina short fibers, SiC whiskers, and Si3N4 particles are 7%, 15%, and 30%, respectively, the weight ratio of fine metal pieces to the reinforcing material is 30%, and the metal oxidation to the reinforcing material is 30%. The weight ratio of the particles of material was 1%, the weight ratio of metal fluoride to reinforcement was 0.2%, and the overall volume fraction was 7.4-51.7%. In addition, each molded body has 2
It had dimensions of 0x20x40 ma+, and the metal fines, metal oxide fines, and metal fluoride fines were substantially uniformly dispersed in the compact.

Next, as shown in FIG. 2, each molded body 10 is placed in a molten metal container 16 without preheating, and 70
A molten metal 18 of the matrix metal at 0° C. was poured, and the molten metal was solidified without applying pressure. In this case, aluminum alloy (JIS standard AC4C) and magnesium alloy (JIS standard MC-2) were used as matrix metals.

Next, the composite material 20 formed in the original molded body is cut out from each of the solidified bodies produced as described above, and the central part thereof is cut in the transverse direction as shown by the imaginary line 22 in FIG. The quality of each composite material was evaluated by cutting the composite material, polishing the cut surface, and performing physical observation and observation using an optical microscope.

The results of these evaluations show that the reinforcing materials are alumina short fibers, SiC
The cases of whiskers and Si3N4 particles are shown in Tables 2 to 4, respectively. In these tables, ◎ indicates that both the macroscopic composite state and the microscopic composite state are good, O indicates that the macroscopic composite state is good, and Δ indicates that the macroscopic composite state is good. This indicates that only a certain degree of compositing has been achieved, and x indicates that no conjugation has been achieved at all (the same applies to Table 6, which will be described later).

From Tables 2 to 4, regardless of the type and volume ratio of the reinforcing material, good composite formation is achieved when the molded body contains fine pieces of metal, fine pieces of metal oxide, and metal fluoride. I understand.

Comparative Example 1 A molded body identical to that of Example 1 except that it does not contain fine pieces of fluoride was formed, and the molded bodies were composited in the same manner as in Example 1. manufacture materials,
The quality of each composite material was evaluated in the same manner as in Example 1. The results of these evaluations are shown in Tables 2 to 4.

From Tables 2 to 4, it can be seen that good composite formation cannot be achieved when the molded body does not contain fine pieces of metal fluoride. Furthermore, from a comparison between this comparative example and Example 1, it is found that when the molded article contains a metal fluoride, fine particles of the metal oxide are wetted by the reinforcing material in the above-mentioned patent application No. 1983. Even with metal oxides that are considered to have no effect on improving properties, a good composite is achieved, and it is therefore clear that the fine pieces of metal oxide may be an oxide of any metal.

Comparative Example 2 Made only of the same reinforcement material as that used in Example 1 above, with volume percentages of 7%, 25%, and 50%, respectively.
A molded body was formed, and an attempt was made to manufacture a composite material using the same procedure and conditions as in Example 1 for each molded body.

However, as shown in Tables 2 to 4, good composite formation was not achieved in any of the molded bodies.

In addition, the molded bodies of Comparative Examples 1 and 2 above were used, and the procedure and conditions were the same as in Example 1, except that the molten matrix metal was pressurized at various pressures using a high-pressure casting device. Attempts were made to manufacture composite materials. As a result, it was found that in order to achieve good composite formation, it was necessary to pressurize the molten matrix metal at a pressure of at least 500 kg/a [2 or more].

Example 2 The effect of containing fine pieces of metal, fine pieces of metal oxide, and fine pieces of metal fluoride in the molded body of the reinforcing material was
Reinforcements shown in Table 5 below, oxides shown in Table 6,
We investigated combinations of fluoride and matrix metal.

First, a molded body is formed from the reinforcing material shown in Table 5 below and fine pieces of metal, fine pieces of metal oxide, and fine pieces of metal fluoride shown in Table 6, and these molded bodies are Composite materials were manufactured in the same manner as in Example 1 using the molten matrix metals shown in Table 6, and Example 1 except that the preheating temperature of the molded body was 200°C for each composite material. The quality of the composite condition was evaluated in the same manner as in the case of .

For the purpose of comparison, molded bodies identical to those of this example except that fine pieces of metal fluoride were not included were formed, composite materials were manufactured using these molded bodies, and composite materials were manufactured using these molded bodies. The quality of the composite condition of the materials was similarly evaluated.

The results of these evaluations are shown in Table 6 below. From Table 6, when the molded body contains fine pieces of metal, fine pieces of metal oxide, and fine pieces of metal fluoride, reinforcing material, fine pieces of metal, fine pieces of metal oxide, and It can be seen that a good composite can be achieved regardless of the type of fine metal fluoride particles or the composition of the matrix metal.

Although not shown as an example, even when the reinforcing material is long fibers such as carbon fibers, SiC fibers, and alumina fibers, fine pieces of metal or fine pieces of metal oxide may be present on the surface of the m-fibers. And how many fine pieces of metal fluoride are mixed?If fine pieces of metal, fine pieces of metal oxide, and fine pieces of metal fluoride are mixed into these molded products, a good composite will be achieved. was allowed to obtain.

Example 3 Combinations of the reinforcing material, fine metal pieces, fine pieces of metal oxide, and fine pieces of metal fluoride, in which a good composite was achieved in Example 1 (Tables 2 to 4) The volume ratio of the reinforcing material, the weight ratio of the fine pieces of metal, the fine pieces of metal oxide, and the fine pieces of metal fluoride to the reinforcing material were as in Example 1. With the same mixture as in the case, the outer diameter is 401 m and the inner diameter is 3 m, as shown in Figure 4.
0III111 A cylindrical molded body 24 having a length of 50 mm was formed. In addition, in Figure 4, 26, 27, 28 and 29
represent reinforcing material, metal fine pieces, metal oxide fine pieces, and metal fluoride fine pieces, respectively. In addition, the same aluminum alloy (JIS standard AC4C) as the matrix metal used in Example 1 was used as the matrix metal.
A molten metal of magnesium alloy (JIS standard MC-2) was prepared.

Next, as shown in FIG. 5, the upper end of each molded body 24 is held in a bottle set-shaped holder 30 without preheating, and the lower end of each molded body is heated to 700° C. stored in a molten metal container 32. was brought into contact with a molten metal 34 of matrix metal. Then, the molten matrix metal permeated the entire molded body from the lower end to the upper end of each molded body within 4 to 15 seconds.

After the molten metal completely permeated the entire molded body, the molded body was separated from the molten metal as shown in FIG. 6, and the molten metal was allowed to solidify in that state. In this case, the molten metal remains attached to the molded body due to surface tension until it solidifies.
There was virtually no dripping from the molded article.

Next, when the dimensions of the cylindrical body made of composite material thus manufactured were measured, the outer diameter, inner diameter, and length were each 39 to 4.
1n+++, 28-30 mm, and 49-50 I, and each cylinder was found to have substantially the same shape and dimensions as the original molded body.

Further, when each cylinder was cut and the composite state thereof was investigated, it was confirmed that the matrix metal was well filled to the surface of each cylinder without excess or deficiency.

From the above explanation, according to the present invention, it is possible to produce a composite material in which the matrix metal is well filled between individual reinforcing materials without pressurizing the molten metal of the matrix metal, more efficiently and at a lower cost than with conventional methods. It will be understood that composite material castings of predetermined shapes and dimensions can be produced very efficiently, inexpensively, and with high yields without using molds or the like.

In Examples 1 and 3 described above, the molded bodies were not preheated, but even when the molded bodies were preheated in these Examples, the same good results as in the above-mentioned Examples were obtained. It has been confirmed that compounding can be achieved.

Although the present invention has been described above in detail with reference to several embodiments, the present invention is not limited to these embodiments, and various other embodiments are possible within the scope of the present invention. It will be clear to those skilled in the art that

Table 1 T1 fiber 20 1 〃Cu-
Zn fiber 2) 60 3 Aisin Seiki Oki Al-Mg fiber 3) 60 3 //
Zn fiber 90 3 Sn fiber 90 3 W powder
1.0 Japan New Metal ■Mo powder 5-7/ Ta powder 10 High purity chemical ■Nb powder 3 -〃■Lead powder 6 - //Zr powder 74 -〃Co powder
2-3 - Mn powder 2-
3-〃S1 powder 43
- "Cr powder 2~3
- //Ag powder 75 -
71Mg powder 75
Fukuda Metal ■PB powder 75 -
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x Q x ◎ ,◎,. 8◎8◎8゜8 Ku◎×◎ku◎ku◎ku◎× 310ri◎＜115＜I◎ku◎ku◎× White 0＜10＜10＜I◎ku◎ku◎8 White◎ku◎＜o＜oku◎ku◎ 8 Gi10<l◎kuoku◎(oku◎X pull◎ku◎ku◎ku0<l◎〈◎× White◎〈◎＜0＜◎(◎ku◎× !lso-ichimonsobee; Bee; Gate - Ichikawa◎・◎・◎・◎・◎・◎× Tobi 1◎ku◎X◎×◎×◎×◎× ”◎ku◎×◎×◎×◎×◎X 21◎〈◎× ◎ × ◎ gu◎×◎×◎×◎×◎× 5I◎く◎・◎×◎×◎・;Bee;Oath;Shoso;Oath;= 〒◎く◎〈◎×◎× 箪〒 ◎ 〈 ◎ 〈 ◎ × Fixed atmosphere ◎ X ◎ × ◎ × ◎ × Castle Go ◎ × ◎ × ◎ × ◎ × Castle

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a molded body made of reinforcing material, fine pieces of metal, fine pieces of metal oxide, and fine pieces of metal fluoride;
Figure 2 is an illustration showing how a composite material is manufactured according to the method of the present invention using the molded body shown in Figure 1, and Figure 3 is a composite material manufactured by the method shown in Figure 2. A perspective view showing the material, FIG. 4 is a perspective view showing a cylindrical molded body made of a reinforcing material, fine pieces of metal, fine pieces of metal oxide, and fine pieces of metal fluoride, and FIG. 5 is a perspective view showing the molded body. FIG. 6 is an illustration showing a state in which the lower end of the molded body is immersed in the molten matrix metal, and FIG. 6 is an illustration showing the state in which the molded body is pulled up from the molten matrix metal. 10... Compression molded body, 12... Reinforcement material, 13...
Fine pieces of metal, 14...Fine pieces of metal oxide, 15.
...Fine pieces of metal fluoride, 16...Mold 118...
・Matrix metal molten metal, 20... Composite material, 24
... Compression molded body, 26... Reinforcement material, 27... Fine pieces of metal, 28... Fine pieces of metal oxide, 29...
Fine pieces of metal fluoride, 30... Holder, 32...
・Molten metal container, 34...Matrix metal molten metal patent Applicant: Toyota Motor Corporation representative
Patent Attorney Masa Akashi
Tsuyoshi Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 3' Figure 6...Molded object...Reinforced metal...Fine pieces of metal...Fine pieces of metal oxide...Fine pieces of metal fluoride Piece 1: Molten matrix metal

Claims (1)

[Claims] A molded body containing an inorganic reinforcing material other than metal, fine pieces of metal, fine pieces of metal oxide, and fine pieces of metal fluoride is formed, and at least a part of the molded body is made of Al, Mg, etc. ,A
A method for producing a metal matrix composite material, which comprises contacting a molten metal of a matrix metal selected from the group consisting of Mg alloys and Mg alloys, and causing the molten metal to infiltrate into the molded body without substantially applying pressure.