Supply superfine tantalum silicide powder TaSi2 particle used to anti-oxidation coating

Specification of tantalum silicide:

CAS No:12039-79-1;ENINEC No.:234-902-2

Application of tantalum silicide:

1) Prepare a silicon nitride-tantalum silicide composite ceramic material, the silicon nitride-tantalum silicide composite ceramic material is composed of the following raw materials in parts by weight: 92-98 parts of silicon nitride powder, 12-15 parts of tantalum silicide powder Parts, 3-6 parts of neodymium powder, 2-5 parts of rhodium oxide powder. The silicon nitride-tantalum silicide composite ceramic material prepared by the present invention has low porosity, and the ceramic material product can still maintain good mechanical properties during long-term operation and has a long service life. In addition, the silicon nitride prepared by the present invention Tantalum silicide composite ceramic materials have high fracture toughness, which is beneficial to meet the market's increasing performance requirements for silicon nitride ceramic materials.

2) Preparation of tantalum silicide coating, the method includes: using tantalum silicide powder with a particle size range of 10~120 microns and a purity of greater than 95wt%, and spraying the tantalum silicide powder on the surface by vacuum plasma spraying process or low pressure plasma spraying process The surface of the pretreated high-temperature resistant substrate material obtains a tantalum silicide coating. The parameters of the plasma spraying process are: plasma gas Ar: 30-50 slpm; plasma gas H2: 8-18 slpm; powder carrier gas Ar: 1.5 -5slpm; spraying distance: 100-350mm; spraying power: 30-58kW; powder feeding rate: 8-30g·min-1; spraying pressure: 100-800mbar.

3) Preparation of a carbon/carbon composite material-based tantalum silicide/silicon carbide coating, which consists of tantalum silicide, silicon carbide, silicon and a small amount of transition metal carbides, which is prepared by a secondary embedding method after polishing The silicon carbide coating is directly embedded and deposited on the surface of the later carbon/carbon composite material, and then a tantalum silicide outer coating is deposited on the surface of the carbon/carbon composite material with the silicon carbide coating deposited by the embedding method. The invention can effectively utilize the high-temperature oxidation resistance of tantalum silicide, increase the use temperature of carbon/carbon composite materials, fill up the gap in the research of carbon/carbon composite material-based tantalum silicide coatings at home and abroad, and become a future carbon/carbon composite material It lays the foundation for long-term use at higher temperatures in this field.