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论文类型：期刊论文

发表时间：2009-07-01

发表刊物：JOURNAL OF MATERIALS RESEARCH

收录刊物：SCIE、EI

卷号：24

期号：7

页面范围：2210-2214

ISSN号：0884-2914

摘要：The uniaxial compressive deformation of core/shell-type Cu/Ag nanoparticles and naked Cu nanoparticles were simulated by molecular dynamics, revealing the role of nanophase boundaries in the mechanical deformation. The simulations show that single type of partial dislocations glide across the entire slip planes of the Cu cores, resulting in elongated Cu cores compared with circular Cu cores of naked Cu nanoparticles. The phase boundary is the nucleation source of dislocations, and the ultrahigh atomic level stress of part atoms in the phase boundary can ensure the movement of the single type of dislocations under compressed.