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Titanium-molybdenum carbide ceramic powder and preparation method thereof

A technology of titanium carbide, molybdenum and ceramic powder, which is applied in the field of ceramics to achieve the effect of single phase composition and high purity

Active Publication Date: 2014-11-19
临泉县非凡装饰工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no TiMoC cermet with a single-phase microstructure

Method used

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  • Titanium-molybdenum carbide ceramic powder and preparation method thereof

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preparation example Construction

[0032] The present invention also provides a preparation method of titanium molybdenum carbide ceramic powder, comprising the following steps:

[0033] a Melting: Melting titanium powder and molybdenum powder into Ti in a non-consumable vacuum melting furnace x Mo 1-x Alloy; Ti x Mo 1-x In the alloy, the weight content of each element is: Ti5.3-81.8wt%, Mo18.2-94.7%, wherein, 0.1<x<1;

[0034] b hydrogenation pulverization: remove Ti first x Mo 1-x The oxide layer on the surface of the alloy is washed and dried, and then the obtained Ti x Mo 1-x The alloy is hydrogenated at 400-450°C and 3.5-4.5MPa to obtain Ti x Mo 1-x alloy, then cooled to room temperature and pulverized to obtain Ti x Mo 1-x Powder;

[0035] c with carbon: the Ti x Mo 1-x The powder and carbon powder are mixed, then dried and pressed to obtain Ti x Mo 1-x C blank; wherein, the amount of carbon powder added is Ti x Mo 1-x 13.16%-22.73% of powder mass;

[0036] d Sintering reaction: the Ti ...

Embodiment 1

[0060] Embodiment 1 Adopt the method of the present invention to produce titanium carbide molybdenum ceramics

[0061] Take 3.3 grams of titanium powder and 26.7 grams of molybdenum powder and mix them manually on a tablet press to form a block, put it into a crucible in a non-consumable vacuum melting furnace, and evacuate to 5×10 -3 MPa, fill the vacuum chamber with high-purity argon (>99.9%), and vacuumize to 5×10 after repeated three times -3 MPa, argon gas is introduced into the vacuum chamber; the alloy is smelted by ignition arc, and each sample is smelted by repeated flipping 3 times.

[0062] Cool to room temperature and take out the sample to remove the alloy surface layer with a polishing electric drill, wash and dry with absolute ethanol, put the sample in a hydrogenation device, vacuumize for 10 minutes, heat to 400°C and continue heating for 20 minutes, turn off the vacuum pump, and put 4Mpa hydrogen to make the sample undergo hydrogenation reaction; vacuumize a...

Embodiment 2

[0065] Embodiment 2 Adopt the method of the present invention to produce titanium carbide molybdenum ceramics

[0066] Take 10 grams of titanium powder and 20 grams of molybdenum powder and mix them manually on a tablet press to form a block, put it into a crucible in a non-consumable vacuum melting furnace, and evacuate to 5×10 -3 MPa, fill the vacuum chamber with high-purity argon (>99.9%), and vacuumize to 5×10 after repeated three times -3 MPa, argon is introduced into the vacuum chamber. The arc is ignited, the alloy is smelted, and each sample is smelted 3 times by repeated flipping.

[0067] Cool to room temperature and take out the sample to remove the alloy surface layer with a polishing electric drill, wash and dry with absolute ethanol, put the sample in a hydrogenation device, vacuumize for 10 minutes, heat to 400°C and continue heating for 20 minutes, turn off the vacuum pump, and put 4Mpa hydrogen to make the sample undergo hydrogenation reaction. After 20 min...

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Abstract

The invention relates to a titanium-molybdenum carbide ceramic powder and a preparation method thereof and belongs to the field of ceramic. The invention provides the titanium-molybdenum carbide ceramic powder with a phase structure being single cubic phase and a purity being not less than 99%. According to the invention, molybdenum powder and titanium powder are mixed uniformly according to a certain proportion and are pressed into blocks. A titanium-molybdenum alloy (TixMo1-x) is heated and smelted by electric arc generated by electrodes in a non-self-consumption vacuum melting furnace. The TixMo1-x alloy is hydrogenated for preparing TixMo1-x powders in different proportions. The TixMo1-x powders in different proportions are mixed with carbon, and then are subjected to a ball-milling process and a block-pressing process. A TixMo1-xC solid solution is prepared in a vacuum furnace in a sintering manner. The TixMo1-xC powder material is high in purity, is single in phase components, can be used not only as an additive of titanium carbide based metal ceramic or titanium carbonitride based metal ceramic but also as a substrate raw material for developing a titanium-molybdenum carbide based metal ceramic material.

Description

technical field [0001] The invention relates to titanium molybdenum carbide ceramic powder and a preparation method thereof, belonging to the field of ceramics. Background technique [0002] Molybdenum is an indispensable and important raw material in the preparation of titanium carbide-based cermets. The addition of molybdenum can improve the wettability of the metal phase and the ceramic phase, thereby improving the performance of the material. At present, in the preparation of titanium carbide-based cermets, molybdenum is added as an additive in the form of molybdenum powder or molybdenum carbide powder. Molybdenum is combined with carbon in the ceramic to form molybdenum carbide, and then forms a titanium carbide molybdenum solid solution with titanium carbide. Functional. Titanium molybdenum carbide can effectively improve the wettability between titanium carbide and titanium carbonitride phase and metal phase, and further improve the performance of the material. Tita...

Claims

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Application Information

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IPC IPC(8): C04B35/56C04B35/626
Inventor 陈敏张雪峰邓刚肖玄方民宪陈伟钟华杰许恒新
Owner 临泉县非凡装饰工程有限公司
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