Batch preparation method of pentatitanium trisilicate intermetallic compound powder

Abstract

The invention relates to a batch preparation method of pentatitanium trisilicate intermetallic compound powder. Si powder and Ti powder are weighed according to a mole ratio of 3: 5 as sintering raw materials; a Ti5Si3 compound is synthesized by adopting a vacuum sintering process; the sintering process comprises the following steps: the Si powder and the Ti powder, uniformly mixed, are put in a vacuum furnace, are heated to 1350-1450 DEG C for insulation, and are cooled to the room temperature along with the furnace; the sintering materials are added in anhydrous ethanol, and are put in a ball milling tank; Ar gas is used as shielding gas; the sealed ball milling tank is put in a high-energy planet ball mill; a wet ball milling method is used for refining; and vacuum drying and grinding are performed on obtained ball milling pulp to pass through a sieve of 130 meshes to obtain Ti5Si3 powder. The method overcomes the defects of easy generation of pollutions, complex machining process,low yield and the like in a casting method, a powder press sintering method, a quick solidification method and a self-propagating combustion method. No by-product is generated in the reaction process;the powder purity is high; meanwhile, the chemical ratios of products can be precisely controlled; the energy consumption is low; the particle sizes of the products are fine and uniformly distributed; the activity is high; the products can be prepared in batches; no pollution is generated; and the cost is reduced.

Description

technical field [0001] The invention relates to a method for intermetallic compound powder, in particular to a batch preparation method for trisilicide pentatitanium intermetallic compound powder. Background technique [0002] Ti 5 Si 3 It has good high temperature stability, high high temperature strength and good oxidation resistance, and is expected to be used in high temperature structural materials above 1300 °C. In addition, due to its low electrical and thermal resistance, Ti 5 Si 3 It also holds promise for electrical connection structures and diffusion barriers. [0003] Before the present invention, usually Ti 5 Si 3 It can be realized by melting casting method, powder pressing and sintering method, rapid solidification method, self-propagating combustion method, etc., but these methods are easy to cause pollution, complicated processing technology, and low yield and are limited. Although Ti is not currently on the market 5 Si 3 Commercial powders are sold...

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Problems solved by technology

[0003] Before the present invention, usually Ti 5 Si 3 It can be realized by melting casting method, powder pressing and sintering method, rapid solidification method, self-propagating combustion method, etc., but these methods are easy to cause pollution, complex processing technology, low yield and limited

Although Ti is not currently on the market 5 Si 3 Commercial powders are sold, and powder synthesis is mainly concentrated in the laboratory stage, with small batches and high costs, which can no longer meet the application needs of the actual field.

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