超高温Nb-Si基复合材料研究现状

Research Status of Ultrahigh-Temperature Nb-Silicide-Based Composites

摘要:

铌硅基复合材料具有优异的高温强度和抗蠕变性能,是高推重比航空发动机高压涡轮叶片和导向叶片极具潜力的候选材料,被认为是最有开发应用前景的下一代超高温结构材料。本文主要论述了对Nb-Si系原位复合材料的研究近况,主要是总结通过合金化和制备工艺的改善,以期使室温断裂韧性、高温强度及抗氧化性能获得良好匹配,对进一步提出优化的制备和研究方案奠定了基础。

Abstract:

The ultrahigh-temperature Nb-Silicide-based composites have been extensively studies as candidate materials for the high-pressure turbine blade and oriented blade of the high thrust-weight ratio aero-engine due to its attractive mechanical and physical properties. This essay talks about the research status of the ultrahigh-temperature Nb-Silicide-based composites. The main research of multiphase refractory Nb–Si in situ composite is to make room temperature fracture toughness, high elevated-temperature strength and resistance to oxidation to have a better match through alloying and the improvement of preparation technology. And hoping to lay a basis for further research.