Method for preparing Ti3 AlC2 powder

A technology of powder and process method, which is applied in the field of chemical synthesis material preparation, and can solve the problems of restricting widespread use and high preparation cost

Inactive Publication Date: 2006-06-28
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the high cost of preparation, the wide

Method used

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  • Method for preparing Ti3 AlC2 powder

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Experimental program
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Effect test

Embodiment 1

[0013] Weigh 6.9434g of Ti powder with a purity greater than 99wt% and 1.6954g of Al powder with a purity greater than 99.99wt% in a molar ratio of 3:1.3:2; Al powder has been included in the 30mol% portion of Al as an additive; % C powder 1.1611g. Then add WC balls according to the ball-to-material ratio of 20:1, and put them into a stainless steel ball mill jar; then seal it, fill it with argon gas, and carry out mechanical alloying; the ball milling time is 60 hours, and the rotation speed is 225rpm. Then put the mechanically alloyed powder into a crucible, and anneal it under the protection of argon. The annealing temperature is 950°C, and the annealing time is 2 hours; 3 AlC 2 Powder.

Embodiment 2

[0015] Weigh 7.0294 g of Ti powder with a purity greater than 99 wt%, 1.3203 g of Al powder with a purity greater than 99.99 wt%, 1.1755 g of C powder with a purity greater than 99.99% in a molar ratio of 3:1:2, and then add Si powder with a purity greater than 99 wt%. Powder 0.2748g. Then add WC balls according to the ball-to-material ratio of 20:1, and put them into a stainless steel ball mill tank; then seal it, fill it with argon gas, and carry out mechanical alloying; the ball milling time is 60 hours, and the rotation speed is 250 rpm. Then transfer the mechanically alloyed powder into a crucible, and perform annealing treatment under the protection of argon. The annealing temperature is 950°C, and the annealing time is 2 hours; then it is cooled to room temperature with the furnace, and the obtained product is Ti 3 AlC 2 Powder.

Embodiment 3

[0017] Weigh 6.7462g of Ti powder with a purity greater than 99wt% and 1.9007g of Al powder with a purity greater than 99.99wt% in a molar ratio of 3:1.5:2; Al powder has been included in the 50mol% portion of Al as an additive; there is also a purity greater than 99.99g % C powder 1.1281g. Then add WC balls according to the ball-to-material ratio of 30:1, and put them into a stainless steel ball mill jar; then seal it, fill it with argon gas, and carry out mechanical alloying; the ball milling time is 60 hours, and the rotation speed is 250rpm. Then put the mechanically alloyed powder into a crucible, and anneal it under the protection of argon. The annealing temperature is 900°C, and the annealing time is 2 hours; then it is cooled to room temperature with the furnace, and the obtained product is Ti 3 AlC 2 Powder.

[0018] The resulting product is detected by X-ray diffraction analysis, in the X-ray diffraction spectrum, see figure 1 , it was found that a characteristic ...

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Abstract

A process for preparing Ti3AlC2 powder used to prepare high-performance Ti3AlC2 ceramic includes such steps as loading Ti, Al and C in the ball grinder with stainless steel balls, filling argon gas, grinding for 40-80 hr for mechanical alloying, loading the powder in crucible, annealing in argon gas, and cooling.

Description

technical field [0001] The present invention relates to a kind of Ti 3 AlC 2 The powder preparation method mainly adopts the technical method of mechanical alloying and annealing treatment, and belongs to the technical field of chemical synthesis material preparation. Background technique [0002] Ti 3 AlC 2 It is a very promising ternary layered machinable ceramic material discovered in recent years, which has the duality of metal and ceramics. Like metal, it has good electrical conductivity, thermal conductivity and damage resistance at room temperature, and has low microhardness and excellent thermal shock resistance, machinability, and plasticity at high temperatures; like ceramics , it has high elastic modulus, high melting point, high chemical stability, high high temperature mechanical strength and good oxidation resistance. It is more meaningful that it has even better than graphite and MoS 2 self-lubricating properties. Ti 3 AlC 2 The powder can be directly...

Claims

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Application Information

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IPC IPC(8): B22F9/04C22C1/04
Inventor 朱丽慧黄清伟邓永清
Owner SHANGHAI UNIV
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