Ti-Hf-Si-Al-C, Ti-Hf-Al-C and Ti-Zr-Al-C solid solution material and preparation method thereof

A solid solution, titanium-zirconium-aluminum technology, which is applied in the field of ceramic solid solution materials and preparation, can solve the problems of rigidity, strength and other mechanical properties decline and limit wide application, and achieve the effects of shortening chemical reaction time, simple process and cost saving

Inactive Publication Date: 2010-09-08
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Problems solved by technology

But as a structural material, Ti 3 SiC 2 and Ti 3 AlC 2 The hardness and ductile-brittle transition temperature are ...

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  • Ti-Hf-Si-Al-C, Ti-Hf-Al-C and Ti-Zr-Al-C solid solution material and preparation method thereof
  • Ti-Hf-Si-Al-C, Ti-Hf-Al-C and Ti-Zr-Al-C solid solution material and preparation method thereof
  • Ti-Hf-Si-Al-C, Ti-Hf-Al-C and Ti-Zr-Al-C solid solution material and preparation method thereof

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Embodiment 1

[0027] The particle size range of 200-400 mesh titanium powder 30.59 grams, hafnium powder 5.94 grams, silicon powder 7.01 grams, aluminum powder 0.30 grams and graphite 5.50 grams (stoichiometric ratio of (Ti 0.95 Hf 0.05 ) 3 (Si 0.95 Al 0.05 )C 2 ) Ball milled in alcohol medium for 10 hours, then placed in a graphite mold for cold pressing, the applied pressure is 5MPa, and the cold pressing time is 15 minutes; put it into a hot pressing furnace for hot pressing and sintering at a heating rate of 10°C / min, heating Keep the temperature at 1580°C for 1 hour while gradually increasing the pressure to 25MPa. Then the temperature was lowered to 1400°C, and the temperature was kept at 1400°C for 0.5 hours. The pressure during the whole heat preservation process was maintained at 25MPa. The entire sintering process is carried out under the protection of argon, and the obtained reaction product is analyzed by X-ray diffraction as (Ti 0.95 Hf 0.05 ) 3 (Si 0.95 Al 0.05 )C 2 ( figure 1 (...

Embodiment 2

[0029] The particle size range of 200-400 mesh titanium powder 50.98 grams, hafnium powder 10.10 grams, aluminum powder 10.50 grams and 8.50 grams of graphite (stoichiometric ratio is (Ti 0.95 Hf 0.05 ) 3 AlC 2 ) Ball milled in alcohol medium for 15 hours, then placed in a graphite mold for cold pressing, the applied pressure is 5 MPa, and the cold pressing time is 20 minutes; put it in a hot pressing furnace for hot pressing and sintering at a heating rate of 15°C / min, heating Keep the temperature at 1530°C for 1 hour while gradually increasing the pressure to 30MPa. Then the temperature was reduced to 1400°C, and the temperature was kept at 1400°C for 0.5 hours. The pressure during the whole heat preservation process was maintained at 30MPa. The entire sintering process is carried out under the protection of argon, and the obtained reaction product is analyzed by X-ray diffraction as (Ti 0.95 Hf 0.05 ) 3 AlC 2 ( figure 2 (a)). (Ti 0.95 Hf 0.05 ) 3 AlC 2 The Vickers hardness ...

Embodiment 3

[0031] The particle size range is 200-400 mesh titanium powder 89.79g, zirconium powder 9.10g, aluminum powder 18.63g and graphite 15.12g (stoichiometric ratio is (Ti 0.95 Zr 0.05 ) 3 AlC 2 ) Ball milled in an alcohol medium for 20 hours, then put into a graphite mold for cold pressing, the applied pressure is 15 MPa, and the cold pressing time is 5 minutes; put it into a hot pressing furnace for hot pressing and sintering at a heating rate of 10°C / min, heating Keep the temperature at 1550°C for 1 hour while gradually increasing the pressure to 35MPa. Then the temperature was lowered to 1400°C, and the temperature was kept at 1400°C for 0.5 hours. The pressure during the whole heat preservation process was maintained at 35MPa. The whole sintering process is carried out under the protection of argon, and the reaction product obtained is composed of lath grains (Ti 0.95 Zr 0.05 ) 3 AlC 2 ( image 3 ). (Ti 0.95 Zr 0.05 ) 3 AlC 2 The Vickers hardness of the solid solution material...

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Abstract

The invention relates to a ceramic solid solution material and a preparation method thereof, in particular to a Ti-Hf-Si-Al-C, Ti-Hf-Al-C and Ti-Zr-Al-C solid solution material and a preparation method thereof. The method adopts elemental powder to synthesize Ti-Hf-Si-Al-C (Ti1-xHfx)3(Si1-yAly)C2, Ti-Hf-Al-C (Ti1-xHfx)3AlC2 and Ti-Zr-Al-C solid solution (Ti1-xZrx)3AlC2 in situ, where the numeric area of x is more than 0 and less than or equal to 0.07, and the numeric area of y is more than 0 and less than or equal to 0.10. The method comprises the following steps: firstly, mixing titanium powder, hafnium powder, zirconium powder, silicon powder, aluminum powder and graphite powder which serve as raw materials by a physical mechanical method; filling the mixture in a graphite mold for cold press molding; sintering the mixture in a hot-pressing furnace in which protective atmosphere is introduced to obtain the Ti-Hf-Si-Al-C, Ti-Hf-Al-C and Ti-Zr-Al-C solid solution material. In the invention, the Ti-Hf-Si-Al-C, Ti-Hf-Al-C and Ti-Zr-Al-C solid solution material with high purity, high compactness, high toughness, high hardness, good mechanical performance and other excellent comprehensive performances can be prepared at lower temperature and shorter time.

Description

Technical field [0001] The invention relates to a ceramic solid solution material and a preparation method, in particular to titanium hafnium silicon aluminum carbon (Ti 1-x Hf x ) 3 (Si 1-y Al y )C 2 , Titanium hafnium aluminum carbon (Ti 1-x Hf x ) 3 AlC 2 Or titanium zirconium aluminum carbon (Ti 1-x Zr x ) 3 AlC 2 Solid solution material and its preparation method. Background technique [0002] Ti 3 SiC 2 And Ti 3 AlC 2 They are two new types of ternary layered ceramic materials. The Journal of Progress in Solid State Chemistry (Prog.Solid State Chem.28(2000)201) points out that they combine the many advantages of ceramics and metals, with low density, high modulus, high strength, high electrical and thermal conductivity, and easy Processing and other characteristics, so it has broad application prospects. But as a structural material, Ti 3 SiC 2 And Ti 3 AlC 2 The hardness and toughness-to-brittle transition temperature of the product are relatively low. Above 1000℃, the me...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/04
Inventor 周延春何灵峰包亦望
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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