Tantalum tungsten alloy high-temperature oxidation resistant coating material, preparation method and tantalum tungsten alloy swivel nut

Abstract

The invention relates to a tantalum tungsten alloy high-temperature oxidation resistant coating material, a preparation method and a tantalum tungsten alloy swivel nut. The coating material is characterized by consisting of, in percentage by mass, 7.0-9.0 wt% of MoSi2, 5.5-7.5 wt% of Mo, 4.0-6.0 wt% of W, 3.5-5.5 wt% of ZrO2, 2.5-4.5 wt% of HfO2, 2.5-3.5 wt% of Y2O3, 1.0-2.0 wt% of TiB2, and the balance Si. According to the tantalum tungsten alloy high-temperature oxidation resistant coating material and the preparation method, the coating material can be used in cooperation with a tantalum tungsten alloy in a high-temperature environment, and has good toughness, the combination force with a base material is high, the structure is compact, and the performance is excellent, and the problemof preparation of high-temperature antioxidation protecting coatings of tantalum tungsten alloy (Ta10W) swivel nuts in development of a novel supersonic speed engine is solved.

Description

technical field [0001] The invention relates to a tantalum-tungsten alloy high-temperature anti-oxidation coating material, a preparation method and a tantalum-tungsten alloy screw sleeve. Background technique [0002] With the continuous development of science and technology, the application temperature of high-temperature materials is constantly increasing, especially for supersonic cruise vehicles. With the continuous upgrading of engines, higher temperature and high-temperature performance requirements are put forward for high-temperature materials. Due to the high operating temperature of the engine, the requirements for its material properties are very strict, especially the connection between the components is particularly prominent. At present, breakthroughs have been made in the development of high-temperature oxidation-resistant materials for fastening joints in China, but in C There is a bottleneck in the connection between / C composite material and other componen...

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Problems solved by technology

Due to the high operating temperature of the engine, the requirements for its material properties are very strict, especially the connection between the components is particularly prominent. At present, breakthroughs have been made in the development of high-temperature oxidation-resistant materials for fastening joints in China, but in C There is a bottleneck in the connection between / C composite material and other components. Since C / C composite material has good high temperature performance, but its strength and mechanical properties are poor, in the connection design of structural parts, C / C composite material is commonly used in the way of female thread and Other components are connected. Due to the poor strength, toughness and mechanical properties of C / C composite materials, there are many problems in processing female threads on C / C composite materials: for example, delamination is very easy to occur; threads are prone to tooth loss during processing; Tripping occurs during repeated disassembly and assembly, which leads to problems such as low product connection strength, poor quality consistency, and insufficient reliability of installation work.

The coating mentioned in the above-mentioned patent has the characteristics of ultra-high temperature and long life, but due to the ceramic phase of the coating structure, the coating is extremely brittle, and it is used on parts such as screw sleeves that will deform during installation or work. When in use, due to the brittleness of the coating, cracks or brittle fractures will occur due to deformation. With the increase of deformation, the coating will fall off due to the loose structure of the coating and the low bonding strength between the coating and the substrate, resulting in the coating falling off during installation or Cannot be used on hot parts that will deform or bend during operation

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