CN1060533C - Method for prepn. ceramic crystal whisker strengthened metallic compound-base composite material - Google Patents
Method for prepn. ceramic crystal whisker strengthened metallic compound-base composite material Download PDFInfo
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- CN1060533C CN1060533C CN95109247A CN95109247A CN1060533C CN 1060533 C CN1060533 C CN 1060533C CN 95109247 A CN95109247 A CN 95109247A CN 95109247 A CN95109247 A CN 95109247A CN 1060533 C CN1060533 C CN 1060533C
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- intermetallic compound
- clamp dog
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- whisker
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Abstract
The present invention provides a method for preparing ceramic crystal whisker strengthened (toughened) intermetallic compound-base composite materials, more specifically, a crystal whisker is mixed with high-smelting-point metal powder in an intermetallic compound; by the reaction of the intermetallic compound to generate a thermodynamic condition, low-smelting-point metal in the intermetallic compound penetrates into the mixture on a very simple pressure casting apparatus by means of external pressure and reaction to generate an intermetallic compound containing a certain quantity of crystal whiskers, and thus, an intermetallic compound-base composite material with high strength and high toughness is obtained.
Description
The present invention proposes a kind of manufacture method of intermetallic compound based composite material.Ceramic whisker is (as SiC, SiN, Al
2O
3Deng) have excellent specific tenacity, than characteristics such as stiffness, high heat resistances, mostly be used for light metal (as Al, Mg and alloy thereof) compoundly at present, make metal-base composites, use in that field of aerospace is existing abroad.Calculate the tensile strength of SiC whisker at 1200kgf/mm through theory
2About, but because matrix strength and thermotolerance are poor by comparison too far away, so the every high-performance of whisker can't be given full play of.
Intermetallic compound has excellent hot strength characteristic, at the aeroengine in future, turbine blade, aerospace vehicle etc. to heat-resisting, lightweight has on the parts of requirement tempting application prospect is arranged, and the world several advanced technology country is all in throwing the huge fund research and development at present.
Yet the maximum drawback of intermetallic compound is that fragility is big, difficult processing, and many for this reason investigators have used the method for alloying to improve its fragility, and this is an effective means but also very limited comparatively, and the part loss of strength is arranged.
Promptly can give full play to the intensity of whisker, macrostructure's structure that stiffness characteristics can change intermetallic compound again to increase toughness if in intermetallic compound, add whisker, cooperate the method for toughening of alloying will obtain high performance intermetallic compound based composite material more simultaneously.
The preparation technology of compound is very complicated between metal current, and cost is very high, if the preparation intermetallic compound based composite material must have breakthrough on preparation technology.
The present invention seeks at the intermetallic compound complicated process of preparation, apparatus expensive and intermetallic fragility are big, are difficult to practical problem and propose.
Specific tasks are: the clamp dog that gives that the refractory metal powder in whisker and the intermetallic compound is mixed and made into definite shape, utilize the reaction of intermetallic compound to generate thermodynamic condition on open-and-shut pressure die casting equipment, by ambient pressure the low melting point metal in the intermetallic compound is penetrated into giving in the clamp dog of mixture, reaction simultaneously generates the intermetallic compound that is mingled with whisker, thereby obtain high strength, high tenacity and intermetallic compound based composite material cheaply.
Detailed content of the present invention is: preparation method of the present invention carries out under the device of Fig. 1.Wherein 1 is drift, and 2 is metallic solution, and 3 is prefabricated section, and 4 is mould, and 5 is the pressing machine table top, and 6 is electric furnace, and concrete preparation method carries out according to the following steps:
(1) at first with silicon carbide whisker SiC and the refractory metal powder titanium Ti powder of forming intermetallic compound, mixed by 1: 5～1: 20, looking material malleableize design needs to add 1～5% the malleableize metal element powder that quite gives titanium valve such as chromium Cr or niobium Nb or silicon Si, manganese Mn, vanadium V, molybdenum Mo etc., forms and gives clamp dog.The volume fraction of giving clamp dog is as the criterion with the atomic ratio that satisfies intermetallic compound and form, and the volume fraction of giving clamp dog if wish to get the TiAl base, when whisker content is 5% matrix material, is given the clamp dog volume fraction and is about 51.6% between 46～55%.
The refractory metal powder can also adopt nickel, niobium Nb, manganese Mn, iron Fe, according to the above ratio with silicon nitride SiN or aluminium oxide Al
2O
3Whisker mixes, and also can add above-mentioned wherein a kind of malleableize element.
(2) will give clamp dog then is positioned over and is heated to proper temperature (as 680 ℃～700 ℃) in the metal mould.
(3) will form low melting point metal (as the Al) fusing of intermetallic compound again, be warmed up to proper temperature (as 780 ℃～840 ℃).
(4) adopt squeeze casting method, mould is placed on the pressing machine, cast low melting point metal solution pressurizes and solution is penetrated into give clamp dog inside, and when infiltrating, at high temperature solution and metal-powder react, the generation intermetallic compound.
(5) (after naturally cooling to certain temperature (as 400 ℃) as 40～50MPa), the intermetallic compound based composite material with definite shape is taken out in the demoulding when keep-uping pressure.
The invention provides high-level efficiency, the low cost of compound-base composite material between a novel whisker reinforcedmetal of preparation, the novel method of good reliability.Can obtain the high strength of this matrix material, high tenacity, high-quality close property with this method.
Advantage such as the present invention also has, and equipment is simple, but the easy once-forming of technology, cost inferior quality are good is for new way has been created in the exploitation of intermetallic compound based composite material.
Fig. 1 is a principle of device structure iron provided by the invention.
Embodiment 1:
The metal-powder that the embodiment of the invention adopted is Ti powder (purity is 99.9%), and molten metal is that commercial-purity aluminium Al (purity is 99.7%) whisker is SiN.
(1) at first whisker is mixed by 5: 51 volume ratios with the Ti powder, make the clamp dog that gives of Φ 32 * 20mm.Giving the clamp dog volume fraction is about 53.6%.
(2) will have the mold heated to 680 of giving clamp dog then and ℃ simultaneously Al liquid will be heated to 840 ℃.
(3) on pressing machine, pour into a mould, add pressure solution and ooze (plus-pressure is 40MPa).
(4) keep-up pressure be cooled to 400 ℃ after, the demoulding.
Obtain the whisker volume fraction and be about 5%, matrix is the matrix material (photo such as Fig. 2) of Ti-48Al intermetallic compound.
Embodiment 2:
(1) metal-powder that the embodiment of the invention adopted is Ti powder (purity is 99.9%) and SiC whisker, commercial-purity aluminium Al (99.7%) and chromium Cr powder.
(2) earlier the Cr powder of sneaking into 1% weight ratio in the Ti powder is mixed with Ti, Cr powder mix the SiC whisker by 5: 49 volume ratios again, make the clamp dog that gives of Φ 32 * 20mm.Give the clamp dog volume fraction and be about 52%.
(3) will have the mold heated to 700 ℃ of sub-clamp dog, simultaneously aluminium liquid will be heated to 840 ℃.
(4) add pressure solution after cast on the pressing machine and ooze, plus-pressure is 40MPa.
(5) keep-up pressure, be cooled to 450 ℃ after the demoulding.
Obtain SiC whisker volume fraction and be about 5%, matrix is the matrix material of TiAl intermetallic compound.
Embodiment 3:
(1) raw material adopts Ni powder (purity is 99.9%) SiC whisker, commercial-purity aluminium Al (99.7%) and chromium Cr powder.
(2) SiC whisker and Ni powder were pressed 1.1: 8: 8, volume ratio is mixed, and makes the clamp dog that gives of φ 32 * 20mm.Give the clamp dog volume fraction and be about 37.8%.
(3) will fill the mold heated to 700 ℃ of giving clamp dog, simultaneously aluminium liquid will be heated to 860 ℃.
(4) after cast on the pressing machine, add pressure solution and ooze, plus-pressure is 30MPa.
(5) keep-up pressure, be cooled to 450 ℃ after the demoulding.Obtaining the whisker volume fraction is that 5% matrix is the matrix material of NiAl intermetallic compound.
Claims (2)
1. a ceramic whisker strengthens the preparation method of intermetallic compound based composite material, it is characterized in that: realize according to the following steps:
(a) at first with silicon carbide whisker and the refractory metal powder titanium valve of forming intermetallic compound, by 1: 5～1: 20 mixed, make and give clamp dog, the volume fraction of giving clamp dog is between 46～55%;
(b) then, will give clamp dog is positioned over and is heated to 680 ℃～700 ℃ temperature in the metal mould;
(c) the low melting point metal Al that will form intermetallic compound is warming up to 780 ℃～840 ℃ and dissolves;
(d) adopt squeeze casting method, mould is placed on the pressing machine, cast low melting point metal solution, pressurization penetrates into its solution and gives clamp dog inside again;
(e) keep-uping pressure in 40～50MPa, naturally cool to 400 ℃ of temperature after, the intermetallic based composites with definite shape is taken out in the demoulding.
2. preparation method according to claim 1 is characterized in that: add a kind of malleableize metal-powder chromium, niobium, silicon, manganese, vanadium or molybdenum that accounts for its amount 1-5% in the refractory metal powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95109247A CN1060533C (en) | 1995-09-13 | 1995-09-13 | Method for prepn. ceramic crystal whisker strengthened metallic compound-base composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95109247A CN1060533C (en) | 1995-09-13 | 1995-09-13 | Method for prepn. ceramic crystal whisker strengthened metallic compound-base composite material |
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| Publication Number | Publication Date |
|---|---|
| CN1145349A CN1145349A (en) | 1997-03-19 |
| CN1060533C true CN1060533C (en) | 2001-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95109247A Expired - Fee Related CN1060533C (en) | 1995-09-13 | 1995-09-13 | Method for prepn. ceramic crystal whisker strengthened metallic compound-base composite material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100389902C (en) * | 2004-01-20 | 2008-05-28 | 本田技研工业株式会社 | Method for manufacturing formed article made from metal based composite material |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101386949B (en) * | 2007-09-12 | 2010-04-14 | 中国科学院金属研究所 | High-strength and high damping compound material and preparation method thereof |
| CN105346162A (en) * | 2015-12-08 | 2016-02-24 | 太仓斯普宁精密机械有限公司 | Low-density composite metal material |
| CN106853530B (en) * | 2017-01-13 | 2019-04-16 | 哈尔滨工业大学 | A kind of method of powdering-hot pressed sintering preparation stratiform titanium composite material |
| CN109227973B (en) * | 2018-08-20 | 2020-09-29 | 杨燕军 | Aluminum-based diamond composite ultra-high hardness scribing cutter and manufacturing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1100154A (en) * | 1993-09-08 | 1995-03-15 | 哈尔滨工业大学 | Method for blackening crystal whisker reinforced aluminium-based composite |
| CN1100353A (en) * | 1993-09-16 | 1995-03-22 | 哈尔滨工业大学 | Producing method of prefabricated crystal whisker block for metal-base composite |
-
1995
- 1995-09-13 CN CN95109247A patent/CN1060533C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1100154A (en) * | 1993-09-08 | 1995-03-15 | 哈尔滨工业大学 | Method for blackening crystal whisker reinforced aluminium-based composite |
| CN1100353A (en) * | 1993-09-16 | 1995-03-22 | 哈尔滨工业大学 | Producing method of prefabricated crystal whisker block for metal-base composite |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100389902C (en) * | 2004-01-20 | 2008-05-28 | 本田技研工业株式会社 | Method for manufacturing formed article made from metal based composite material |
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| CN1145349A (en) | 1997-03-19 |
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