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反常霍尔-佩奇效应
释义
反常霍尔-佩奇效应
Encyclopedia
理学
纳米晶体材料力学
释
abnormal Hall-Petch relationship
反常霍尔-佩奇效应
当金属材料特征结构尺寸(通常指晶粒尺寸)低于某一临界尺寸(十几或几纳米)时,随特征结构尺寸的减小,材料硬度(或强度)保持不变或不断降低的现象。又称反常霍尔-佩奇现象。通常情况下,随金属材料特征结构尺寸的减小,材料硬度(或强度)不断增加的现象,称为霍尔-佩奇现象。
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