铌合金硅化物涂层的制备工艺及改进途径

Manufacturing Process and Improvement of Silicon Coating on Niobium-Based Alloy

铌及铌合金以其熔点高、耐腐蚀和良好的高温强度成为重要的高温结构材料,但高温抗氧化性能较差是制约其应用的关键问题。本文论述了铌合金高温抗氧化硅化物涂层的研究进展,并阐述了不同制备方法的硅化物涂层形成机理和相应的抗氧化性能,分析了研究中面临的问题,并提出了解决途径。

Nb and Nb-based alloys are important high temperature structural materials because of their high melting point, corrosion resistance, and high temperature strength. However, poor high temperature oxidation resistance restricts their application. The present status of research on high temperature oxidation resistant silicon coatings of Nb-based alloys is reviewed in this paper, and the mechanism of silicide coatings manufacture and their corresponding high temperature oxidation resistance properties are expatiated. Existing problems are analyzed and possible solutions are suggested.