南华大学学报：自然科学版2011，Vol.25Issue(4)：85-90,6.
钛基二元纳米合金形成焓的尺寸效应
The Size-effect on the Formation Enthalpy of Nanosized Binary Ti Based Alloy
摘要
Abstract
The effects of grain size and composition on the formation enthalpy of nano binary Ti-based alloy are investigated by taking the surface effect into account within the modified Miedema model.It is demonstrated that the formation enthalpy of binary Ti based alloy with nano grains is size-dependent and exhibits evident size-effects.The formation enthalpy increases with the size decrease,and its value turns from negative to positive at a critical size,which will weaken the thermal stability of the nano grains.Furthermore,the composition segregation taking place in the nano grains of the Ti based alloy is obvious when the grain size is less than 10 nm and the tendency of segregation is dependent on the surface formation enthalpy of nanoparticle.关键词
改进Miedema模型/纳米颗粒/钛基合金/形成焓/尺寸依赖性/成分聚集Key words
modified miedema model/nano particle/Ti based alloy/formation enthalpy/size-dependence/composition segregation分类
数理科学引用本文复制引用
吕云宾,廖树帜..钛基二元纳米合金形成焓的尺寸效应[J].南华大学学报：自然科学版,2011,25(4):85-90,6.基金项目
湖南省科技厅科研基金资助项目 （）
