摘要
拓扑密排结构的金属间化合物是潜在的高温结构材料,Laves相金属间化合物是其中最大的一类。而Laves相NbCr2基化合物已成为高温结构材料研究中的一个热点。该化合物具有较高的熔点、较低的密度和比较好的抗氧化性。综述了合金元素对Laves相NbCr2基化合物的晶体结构、缺陷、相稳定性等物理冶金特性以及硬度、强度和延性、高温流变性能、断裂韧性等力学性能方面的影响,介绍了微量合金元素所产生的掺杂效应,并就目前研究中的不足以及该研究领域的发展方向提出了一些看法。
Topologically close-packed （TCP） intermetallies compounds are potential high temperature structural materials. In the group of TCP intermetallies, Laves phases constitute the only largest group. Laves phase NbCr2-based compounds have recently become a hot topic in high temperature structural materials for their high melting temperatures and fairly low densities and reasonable oxidation resistance. The recent research progresses of alloying elements effects on physical metallurgy, such as crystalline structure, defects and phase stability, and mechanical properties including hardness, strength and ductility, high-temperature rheologieal properties and fracture toughness were reviewed. The doping effects were mainly introduced which produced by trace alloying elements. Finally, the existing problems in these researches and the future research fields were put forward.
出处
《金属热处理》
CAS
CSCD
北大核心
2008年第6期19-23,共5页
Heat Treatment of Metals
基金
南昌航空大学研究生创新基金(YC2006001)
江西省研究生创新基金(YC07A082)
