航空航天工业要求材料在高温条件下具有较高性能 ,因此难熔金属基合金已成为替代 Ni基超合金的首选材料。Nb在难熔金属中密度较低 ,得到广泛关注 ,但在氧化环境下 ,Nb及 Nb合金性能急剧下降 ,通过改良合金的方法虽然能提高其抗氧化性能 ,但却不能保证其机械加工性能 ,因此 ,有 The aerospace industry requires materials with high performance at high temperatures, so refractory metal-based alloys have become the material of choice for replacing Ni-based superalloys. Nb has attracted a lot of attention in the refractory metals. However, the properties of Nb and Nb alloys decline rapidly under the oxidative environment. Although the method of improving the alloy can improve its oxidation resistance, Nb can not guarantee its machinability, So, yes