钼合金制备工艺的研究进展

纯金属钼存在低温脆性、再结晶脆性、抗高温氧化能力较差等明显缺点,极大限制了其应用范围,通过在钼基体中添加第二相(稀土氧化物(La_2O_3、Ce_2O_3、Y_2O_3)和碳化物(TiC、ZrC、HfC))形成的钼合金因具有良好的高温性能、较低的韧脆转变温度、较高的再结晶温度受到了国内外学者的广泛关注。本文对三种钼合金制备工艺(固–固掺杂、固–液掺杂和液–液掺杂)进行了总结,并对其发展趋势做出了展望,结果表明采用液–液掺杂工艺能显著提高材料的均匀性和力学性能。

Research progress on preparation technology of molybdenum alloy

Application of pure molybdenum is extremely limited due to the shortcomings of high ductile-brittle transition temperature, embrittlement after recrystallization, and deficient performance on high-temperature oxidation resistance. However, by adding a second phase (rare earth oxide (La2O3, Ce2O3, and Y2O3) and carbide (TiC, ZrC, and HfC)) to form molybdenum alloy, the properties of molybdenum get significantly improved, which arouses the wide attention domestically and abroad. The preparation technology of molybdenum alloy (solid–solid doping, solid–liquid doping, and liquid–liquid doping) was summarized and the development tendency was illustrated in this paper. The results show that the liquid–liquid doping process can significantly improve the homogeneity and mechanical properties of materials.