摘要
运用模式识别的偏最小二乘法(PLS)对AB2合金MgCu2型(C15)和MgZn2型(C14)Laves相进行研究,得出了影响二元合金Laves相结构的判据.对于由非过渡-过渡元素、过渡-过渡元素组成的合金,价电子密度是影响其Laves相结构的主要原因;对过渡-镧系(锕系)元素组成的合金,B原子的价电子数对其Laves相结构影响最为明显,且价电子和原子半径对Laves相结构的影响作用互为反向.
The AB(2) type Laves phases with cubic MgCu2 and hexagonal MgZn2 structures are investigated by partial least square (PLS) method and some criteria for classification of the two structures of Laves phases are obtained. It is found that for nontransition-transition and transition-transition alloys the valence electron densities of component elements are significant in influencing their Laves phase structures, and for transition-lanthanide (actinides) alloys the valence electron density of the atom at B position is the most important factor influencing their Laves phase structures. Besides, the effects of both valence charge and atomic radius on Laves phase structures are in opposition to each other in transition-lanthanide (actinides) alloys.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第1期19-22,共4页
Acta Metallurgica Sinica
基金
国家自然科学基金项目50171023教育部科研重点项目03104广西科学基金项目(桂科基0144033
桂科自0249004)广西"十百千人才工程"项目2000220资助~~
