Principal physical parameters characterizing the interactions between irradiation-induced point defects and several tilt symmetric grain boundaries in Fe, Mo and W

被引：32

作者：

Li, Xiangyan ^{[1
]}

Liu, Wei ^{[1
]}

Xu, Yichun ^{[1
]}

Liu, C. S. ^{[1
]}

Fang, Q. F. ^{[1
]}

Pan, B. C. ^{[2
,3
]}

Chen, Jun-Ling ^{[4
]}

Luo, G-N ^{[4
]}

Wang, Zhiguang ^{[5
]}

机构：

[1] Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China

[2] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China

[3] Univ Sci & Technol China, Dept Phys, Hefei 230026, Peoples R China

[4] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China

[5] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China

来源：

JOURNAL OF NUCLEAR MATERIALS | 2014年 / 444卷 / 1-3期

基金：

中国国家自然科学基金;

关键词：

RADIATION EMBRITTLEMENT; RESISTANCE; DAMAGE; ALLOY; CRYSTALLINE; SIMULATION; METALS; IRON;

D O I：

10.1016/j.jnucmat.2013.09.046

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using molecular-statics, we investigate principal physical parameters characterizing the binding of vacancies and interstitials with grain boundaries (GBs), and their annihilation near GBs in iron, molybdenum and tungsten. Binding energies strongly correlate with GB energies averagely and have a general level when scaled by the bulk defect formation energy. Defect diffusion is enhanced near the GB. The diffusion barrier of the vacancy gradually decreases as it approaches to the GB. For interstitials, there exist several layers near the GB in which the absorption of interstitials is spontaneous and out of which orientation-dependent. For the interstitial-rich GB, the vacancy near the GB can be annihilated at a low barrier, independent of the system. The GB influence range is limited of 1.0-2.0 nm from the GB. Our obtained principal physical parameters may be applied to build the master framework for defects' generation, transport and fate and thus to evaluate the damage rate in nano/poly-crystalline materials. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：229 / 236

页数：8