Effect of hydrogen on generation of lattice defects in shock-loaded Pd
Effect of hydrogen on generation of lattice defects in shock-loaded Pd
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氢对冲击负载 Pd 中晶格缺陷产生的影响
DOI：
10.1016/j.jallcom.2014.12.079
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发表时间：
2015-10
影响因子：
6.2
通讯作者：
Feng Liu
中科院分区：
文献类型：
--
作者：
Oksana Melikhova;Jakub Čížek;Yuzeng Chen;Tao Suo;Ivan Procházka;Feng Liu
这项工作研究了 fcc Pd 晶格中吸收的氢对冲击载荷塑性变形过程中位错和空位产生的影响。首先向退火良好的块状 Pd 样品充入氢气，直至达到不同的氢气浓度。随后，将样品放在 Split-Hopkinson 装置上进行冲击加载。冲击载荷产生极高的应变率并引起样品的强烈塑性变形。通过正电子寿命谱与 X 射线衍射相结合对冲击负载样品的晶格缺陷进行了表征。研究发现，冲击负载的钯样品不仅表现出高密度的位错，而且还表现出由变形引起的空位聚集而产生的小空位簇。用氢预充电 Pd 样品会增加位错密度和空位簇的浓度。
The effect of hydrogen absorbed in fcc Pd lattice on the generation of dislocations and vacancies during plastic deformation by shock-loading was investigated in this work. Well annealed bulk Pd samples were firstly charged with hydrogen up to various hydrogen concentrations. Subsequently the samples were shock-loaded on a Split-Hopkinson apparatus. Shock-loading yields extremely high strain rate and causes intensive plastic deformation of the samples. Lattice defects of the shock-loaded samples were characterized by positron lifetime spectroscopy combined with X-ray diffraction. It was found that shock-loaded Pd samples exhibit not only high density of dislocations but also small vacancy clusters created by agglomeration of deformation-induced vacancies. Pre-charging of Pd samples with hydrogen increases both the dislocation density and the concentration of vacancy clusters.
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影响因子：
0.7
作者：
O. Melikhova;J. Čížek;I. Procházka
通讯作者：
O. Melikhova;J. Čížek;I. Procházka
DOI：
10.1016/0022-5096(63)90050-4
发表时间：
1963-01-01
影响因子：
5.3
作者：
DAVIES, EDH;HUNTER, SC
通讯作者：
HUNTER, SC
DOI：
10.1016/j.nima.2004.09.031
发表时间：
2005-02-21
影响因子：
1.4
作者：
Becvár, F;Cízek, J;Janotová, J
通讯作者：
Janotová, J
影响因子：
9.4
作者：
Kirchheim, Reiner
通讯作者：
Kirchheim, Reiner
影响因子：
3.7
作者：
Barbiellini, B;Puska, MJ;Nieminen, RM
通讯作者：
Nieminen, RM