Abstract

The influence of the high-temperature strength of a nickel-based multicomponent protective coating for the life at isothermal air oxidation of titanium pseudo-α and ortho-alloys at a temperature of 800°C is studied. The introduction of refractory metals, in particular, tantalum and tungsten, is shown to retard the diffusion of titanium and niobium ions to the boundary with a gas medium and to prevent the formation of titanium oxides on the coating surfaces. It is noted that microalloying elements, in particular, yttrium and hafnium favor an increase in the adhesion and exclude a spallation of an oxide film formed on the coating surface during oxidation.

中文翻译：

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在 650°C 以上温度下工作的钛合金的耐热性

摘要

研究了镍基多元保护涂层的高温强度对800℃钛伪α和原合金等温空气氧化寿命的影响。引入难熔金属，特别是钽和钨，可以延缓钛和铌离子向气体介质边界的扩散，并防止在涂层表面形成钛氧化物。值得注意的是，微合金元素，特别是钇和铪有利于增加附着力，并排除在氧化过程中形成在涂层表面上的氧化膜的剥落。