我国典型金属间化合物基高温结构材料的研究进展与应用

宫声凯,尚勇,张继,郭喜平,林均品,赵希宏

Application and Research of Typical Intermetallics-Based High Temperature Structural Materials in China

Shengkai GONG,Yong SHANG,Ji ZHANG,Xiping GUO,Junpin LIN,Xihong ZHAO

表1 合金化元素对Nb-Si基合金相组成和性能的影响[44,45,46,47,48,49,50,51,52,53,54,55,56,57,58]

Table 1 The effects of alloying elements on the constituent phases and properties of Nb-Si based alloys[44,45,46,47,48,49,50,51,52,53,54,55,56,57,58]

Element Constituent phase Oxidation resistance Mechanical property Ti, Hf, Zr Promoting the Improving the oxidation Hf and Zr enhance the fracture toughness and high formation of resistance temperature strength, and Ti also enhances the fracture γ-Nb5Si3 toughness, but excessive Ti content degrades the high- temperature creep resistance of the alloys Mo, W, Al Improving the W and Al improve the Mo enhances the fracture toughness and high temperature stability of β-Nb5Si3 oxidation resistance, strength; W improves the high temperature strength; Al while Mo degrades it has negative impact on mechanical properties Cr Promoting the Improving the oxidation Deteriorating the fracture toughness of the alloys formation of resistance Cr2Nb Rare earth - Improving the oxidation Improving the fracture toughness of the alloys resistance