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Zirconium-aluminum-silicon-carbon-silicon carbide composite material and preparation method thereof

A composite material, zirconium-aluminum-silicon-carbon matrix technology, applied in the field of in-situ reaction hot pressing to prepare zirconium-aluminum-silicon-carbon-silicon carbide composite materials, zirconium-aluminum-silicon-carbon-silicon carbide] 4C5-SiC) composite materials, can solve the problem of hardness , Low strength and toughness, limiting wide application and other issues, to achieve the effect of high hardness

Inactive Publication Date: 2010-09-08
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a structural material, its hardness, strength and toughness are low, which limits its wide application.
However, there is currently no Zr 2 [Al(Si)] 4 C 5 Enhanced reporting

Method used

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  • Zirconium-aluminum-silicon-carbon-silicon carbide composite material and preparation method thereof
  • Zirconium-aluminum-silicon-carbon-silicon carbide composite material and preparation method thereof
  • Zirconium-aluminum-silicon-carbon-silicon carbide composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The raw materials are 100.0 grams of Zr powder, 53.5 grams of Al powder, 19.5 grams of Si powder and 35.6 grams of C powder with a particle size of about 350 mesh. They are ball milled in an alcohol medium for 10 hours, and cold pressed into a cake under a pressure of 10 MPa. In 20 minutes, put it into a graphite mold, and heat it up to 1850° C. in situ reaction hot pressing for 1 hour in a hot pressing furnace with an inert gas (argon) as a protective gas at a rate of 5 ° C / min. The hot pressing pressure is 40MPa. Get Zr 3 [Al(Si)] 4 C 6 -10vol.% SiC composite material, the silicon carbide particle reinforcement phase is uniformly dispersed in the zirconium aluminum silicon carbon matrix, and the size of the zirconium aluminum silicon carbon-silicon carbide composite material is Φ50mm×24mm.

Embodiment 2

[0024] The raw materials are 100.0 grams of Zr powder, 54.3 grams of Al powder, 30.2 grams of Si powder and 42.6 grams of C powder with a particle size of about 300 meshes. They are ball-milled in an alcoholic medium for 10 hours and cold-pressed into cakes under a pressure of 15 MPa. 10 minutes, put it into a graphite mold, and heat it up to 2000° C. in situ reaction hot pressing for 1 hour in a hot pressing furnace with an inert gas (argon) as a protective gas at a rate of 10 ° C / min. The hot pressing pressure is 30MPa. Get Zr 3 [Al(Si)] 4 C 6 -20vol.% SiC composite material, the silicon carbide particle reinforcement phase is uniformly dispersed in the zirconium aluminum silicon carbon matrix, and the size of the zirconium aluminum silicon carbon-silicon carbide composite material is Φ60mm×18.8mm. The corresponding X-ray diffraction patterns are listed in the attached figure 1 superior.

Embodiment 3

[0026] The raw materials are 100.0 grams of Zr powder, 52.1 grams of Al powder, 50.3 grams of Si powder and 47.8 grams of C powder with a particle size of about 400 meshes. They are ball milled in an alcohol medium for 15 hours, and cold pressed into a cake under a pressure of 20 MPa. 5 minutes, pack into graphite mold, under vacuum (vacuum degree is 10 -2 Pa) in a hot-pressing furnace at a rate of 15° C. / min to 1900° C. for in-situ reaction hot-pressing for 0.5 hour, and the hot-pressing pressure is 35 MPa. Get Zr 3 [Al(Si)] 4 C 6 -30vol.% SiC composite material, the silicon carbide particle reinforcement phase is uniformly dispersed in the zirconium aluminum silicon carbon matrix, and the size of the zirconium aluminum silicon carbon-silicon carbide composite material is Φ70mm×15.8mm. Corresponding X-ray diffraction patterns, crystal grain morphology scanning electron microscope photo, are listed in appendix respectively Figure 2-3 superior. The dynamic Young's modulus...

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Abstract

The invention relates to ultrahigh temperature resistant ceramic and preparation technology thereof, in particular provides a zirconium-aluminum-silicon-carbon-silicon carbide composite material and a method for preparing the zirconium-aluminum-silicon-carbon-silicon carbide composite material by in-situ reactive hot pressing. Zr powder, Al powder, Si powder and C powder in a certain stoichiometric ratio are used as raw materials; the raw materials are mixed for 5 to 50 hours by using a physical and mechanical method and are cold-pressed into cakes under the pressure of 5 to 20MPa; and the cakes are filled into a graphite mold and are heated to 1,600 to 2,400 DEG C in a hot pressing furnace into which inert gas serving as protective gas is introduced (or in vacuum) for in-situ hot pressing reaction for 0.1 to 4 hours under the hot pressing pressure of 20 to 40MPa. In the invention, the zirconium-aluminum-silicon-carbon-silicon carbide composite material with high hardness, high strength, high toughness, high ultrahigh-temperature resistance and the like can be synthesized at a relatively low temperature in a short time; and the material obtained by the method can be used at the ultrahigh temperature of above 1,600 DEG C.

Description

technical field [0001] The invention relates to ultra-high temperature resistant ceramics and its preparation technology, and particularly provides a zirconium aluminum silicon carbon-silicon carbide (Zr 2 [Al(Si)] 4 C 5 -SiC) composite material, and a method for preparing zirconium-aluminum-silicon-carbon-silicon carbide composite material by in-situ reaction hot pressing. Background technique [0002] Zirconium aluminum silicon carbide (Zr 2 [Al(Si)] 4 C 5 ) Ceramics are new ultra-high temperature resistant and oxidation resistant structural materials (J.SolidState Chem. (Journal of Solid State Chemistry) 180 (2007) 1809; J.Am.Ceram.Soc. (Journal of American Ceramic Society) (2009)). It combines the advantages of high modulus, high hardness, oxidation resistance, corrosion resistance, high electrical conductivity, and strong damage tolerance. It has broad application prospects in high-tech fields such as aviation, aerospace, nuclear industry and ultra-high temperatur...

Claims

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Application Information

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IPC IPC(8): C22C32/00C22C1/05
Inventor 周延春何灵峰包亦望
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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