Preparation method of composite alloy coating on tantalum-tungsten alloy

Abstract

The invention relates to a preparation method of a composite alloy coating on a tantalum-tungsten alloy. The preparation method comprises the following steps of 1, MoSi2 coating slurry preparation, 2, MoSi2 coating high-temperature sintering, 3, Hf-Ta alloy coating slurry preparation, and 4, Hf-Ta alloy composite coating sintering. According to the preparation method, the product surface is spray-coated with the prepared MoSi2 coating as a transition layer, and the surface of the transition layer is spray-coated with an Hf-Ta alloy coating. The preparation method solves the problem of Hf-Ta alloy coating and base material bonding and tantalum-tungsten alloy high-temperature oxidation. The prepared composite alloy coating is uniform and compact, has no defects such as holes and cracks and has good oxidation resistance.

Description

technical field

[0001] The invention relates to the field of high-temperature oxidation-resistant coatings, in particular to a method for preparing a composite alloy coating on a tantalum-tungsten alloy. Background technique

[0002] Foreign countries have gradually developed a variety of orbit control / attitude control engine materials and high-temperature anti-oxidation coatings since the 1950s. The base materials are mainly focused on refractory metals (W, Mo, Ta, Nb, Re, etc.), and the coatings are mainly Focus on alloy coating, oxide coating, silicide coating, aluminide coating and precious metal coating, such as niobium hafnium alloy / silicon chromium titanium coating in the United States, niobium tungsten alloy / molybdenum silicide coating in Russia, Europe Platinum-rhodium alloy thrust chambers and rhenium-iridium thrust chambers in the United States have model application reports.

[0003] At present, although significant progress has been made in the research and dev...

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