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Aluminium oxide silicon titanium carbonate/aluminium oxide lamina composite material and preparing method

A layered composite material, silicon carbide technology, applied in the field of ceramic matrix composite materials and preparation, can solve the problems of limited wide application and low oxidation resistance, and achieve high purity, improved oxidation resistance, and controllable mechanical properties Effect

Inactive Publication Date: 2008-10-01
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

But as a potential high-temperature structural material, Ti 3 SiC 2 The hardness and low oxidation resistance above 1100°C limit its wide application

Method used

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  • Aluminium oxide silicon titanium carbonate/aluminium oxide lamina composite material and preparing method
  • Aluminium oxide silicon titanium carbonate/aluminium oxide lamina composite material and preparing method
  • Aluminium oxide silicon titanium carbonate/aluminium oxide lamina composite material and preparing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 17.84 grams of titanium powder, 4.18 grams of silicon powder, and 2.98 grams of graphite powder in the alcohol medium were ball-milled for 10 hours with a particle size range of 200 to 400 meshes, and the mixed raw material powder was put into a graphite mould. 2 o 3 ) sheet (thickness is 0.5 millimeters, and diameter is 50 millimeters) after cold press forming, and the pressure that applies is 5MPa, puts into hot-pressing furnace and hot-pressing sintering. The heating rate is 10°C / min, heated to 1550°C and kept for 1 hour, while the pressure is gradually increased to 25MPa. Then the temperature was lowered to 1400°C, and the temperature was kept at 1400°C for 0.5 hours, and the pressure was maintained at 25MPa during the whole heat preservation process. The whole sintering process is carried out under the protection of argon, and the obtained reaction product is analyzed by X-ray diffraction, and the outer layer is mainly α-Al 2 o 3 , with a thickness of 280 micron...

Embodiment 2

[0020] 8.92 grams of titanium powder, 2.09 grams of silicon powder, and 1.49 grams of graphite were ball-milled in an alcohol medium for 15 hours with a particle size range of 200 to 400 meshes, and the mixed raw material powder was put into a graphite mold with alumina (Al 2 o 3 ) sheet (thickness is 1 millimeter, diameter is 50 millimeters) after cold press forming, and the applied pressure is 5MPa, puts into hot-press furnace and hot-press sinters. The heating rate is 15°C / min, heated to 1560°C and kept for 1 hour, while the pressure is gradually increased to 30MPa. Then the temperature was lowered to 1400°C, and the temperature was kept at 1400°C for 0.5 hours, and the pressure was maintained at 30MPa during the whole heat preservation process. The whole sintering process is carried out under the protection of argon, and the obtained reaction product is analyzed by X-ray diffraction, and the outer layer is mainly α-Al 2 o 3 , with a thickness of 550 microns, the inner l...

Embodiment 3

[0022] 53.52 grams of titanium powder, 12.10 grams of silicon powder, and 8.94 grams of graphite were ball-milled in an alcohol medium for 20 hours with a particle size range of 200 to 400 meshes, and the mixed raw material powder was put into a graphite mold with aluminum oxide (Al 2 o 3 ) sheet (thickness is 4 millimeters, and diameter is 50 millimeters) after the cold pressing molding, and the pressure that applies is 10MPa, puts into hot-pressing furnace and hot-pressing sintering. The heating rate is 20°C / min, heated to 1600°C and kept for 1 hour, while the pressure is gradually increased to 30MPa. Then the temperature was lowered to 1400°C, and the temperature was kept at 1400°C for 0.5 hours, and the pressure was maintained at 40MPa during the whole heat preservation process. The whole sintering process is carried out under the protection of argon, and the obtained reaction product is analyzed by X-ray diffraction, and the outer layer is mainly α-Al 2 o 3 , with a th...

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Abstract

This invention relates to the preparation method of an alumina / silicon titanium carbide / alumina (Al2O3 / Ti3SiC2 / Al2O3) sandwich laminar composite by in situ thermocompression / solid-liquid phase reaction. The invention adopts Al2O3 piece to adhere on surface of Ti3SiC2 to form enhanceing silicon titanium carbide (Ti3SiC2) of sandwich laminar composite; firstly , takes titanium power, silicon powder and graphite powder as raw material, mix 10 to 25 hours by physical mechanical process, gain mixture of original powder, then in graphite tooting, put original powder to middle of two Al2O3 pieces, coldd pressing for moulding, the pressure is 5 to 20MPa, sinter in hot pressing furnace that has shielding gas atmosphere, heating rate is 5 to 50 deg per minute, sintering temperature is 1400 to 1650deg, sintering time is 0.5 to 2 hours, sintering pressure 20 to 40 MPa.

Description

technical field [0001] The invention relates to a ceramic matrix composite material and a preparation method thereof, in particular to an aluminum oxide / silicon titanium carbide / alumina sandwich layered composite material prepared by in-situ hot pressing / solid-liquid phase reaction and a preparation method thereof. Background technique [0002] Ti 3 SiC 2 It is a new type of ternary layered ceramic material. Research in the Journal of the American Ceramic Society (Journal of the American Ceramic Society 79, 1953 (1996)) shows that it combines many advantages of ceramics and metals, with low density, high modulus, high electrical and thermal conductivity, and easy processing. And so on, so it has broad application prospects. But as a potential high-temperature structural material, Ti 3 SiC 2 The hardness and low oxidation resistance above 1100 °C limit its wide application. Studies in Biomaterials (Biomaterials.25, 3593 (2004)) and Biotechnology Advances (Trends in Biot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/52C04B35/622B32B33/00C22C1/00
Inventor 周延春万德田包亦望
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI