摘要
晶界成分偏聚对多晶材料的力学性能有很大影响,探明影响晶界成分偏聚的因素和偏聚机理,对改善材料性能和优化设计合金系统具有重要意义。本文通过归纳近几年来国内外原子尺度研究晶界成分偏聚及其机理的研究进展,分析了间隙原子,置换型原子和空位在晶界的偏聚及其对材料性能的影响,讨论了成分偏聚与合金元素择优占位行为的关系,总结了晶界成分偏聚对材料力学性能影响的根本原因。
By introducing atomistic scale studies on solute segregation and its mechanism in recent years, the segregation of interstitial atoms, substitutional atoms and vacancy, and its effect on materials properties are reviewed. The relationship between solute segregation and site preference of alloying elements is discussed. Finally, the physical-based mechanism about the effect of solute segregation on mechanic properties of materials is summed up.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2013年第7期1531-1535,共5页
Rare Metal Materials and Engineering
基金
国家自然科学基金项目(50941020
10902086
50875217
20903075)
陕西省自然科学基金项目(SJ08-B14
SJ08-ZT05)
关键词
晶界
成分偏聚
偏聚机理
原子尺度
择优占位
grain boundary
solute segregation
segregation mechanism
atomistic scale
site preference
