TY - JOUR
T1 - Damage evolution of yttria-stabilized zirconia induced by He irradiation
AU - Yang, Tengfei
AU - Huang, Xuejun
AU - Gao, Yuan
AU - Wang, Chenxu
AU - Zhang, Yanwen
AU - Xue, Jianming
AU - Yan, Sha
AU - Wang, Yugang
N1 - Funding Information:
This work was financially supported by the Ministry of Science and Technology of China (2010CB832904, 2008CB717803) and National Natural Science Foundation of China (11075005), Fundamental Research Funds for the Central Universities. Part of the research is supported by the US Department of Energy, Basic Energy Sciences, Materials Sciences and Engineering Division. Wenguang Zhao’s effect in XRD measurements is appreciated. Tengfei Yang is grateful for the discussion with Aurelien Debelle.
PY - 2012/1
Y1 - 2012/1
N2 - The study presents an investigation of damage evolution of yttria-stabilized zirconia (YSZ) induced by irradiation of 100 keV He ions at room temperature as a function of fluence. Transmission electron microscopy (TEM), X-ray diffraction (XRD) and atomic force microscopy (AFM) were used in order to study the nature and evolution of structural damage at different levels. Our study shows that various kinds of defects are formed with the increasing fluence. Firstly, at low fluences, from 1 × 10 16 to 4 × 10 16 cm -2, of which maximum values of displacement per atom (dpa) range from 0.29 to 1.17, an elastic strain which is attributed to the accumulation of irradiation-induced discrete point defects, is presented. Secondly, in the intermediate fluences ranging from 8 × 10 16 to 1 × 10 17 cm -2 with corresponding dpa varying from 2.33 to 2.91, a large drop of elastic strain occurs accompanied by presence of an intensive damage region, which is comprised by large and interacted defect clusters. Thirdly, at the two high fluences of 2 × 10 17 and 4 × 10 17 cm -2, of which dpa are 5.83 and 11.65 respectively, a great amount of ribbon-like He bubbles with granular structure and cracks are presented at the depth of maximum concentration of deposited He atoms. The structural damage evolution and the mechanism of formation of He bubbles are discussed.
AB - The study presents an investigation of damage evolution of yttria-stabilized zirconia (YSZ) induced by irradiation of 100 keV He ions at room temperature as a function of fluence. Transmission electron microscopy (TEM), X-ray diffraction (XRD) and atomic force microscopy (AFM) were used in order to study the nature and evolution of structural damage at different levels. Our study shows that various kinds of defects are formed with the increasing fluence. Firstly, at low fluences, from 1 × 10 16 to 4 × 10 16 cm -2, of which maximum values of displacement per atom (dpa) range from 0.29 to 1.17, an elastic strain which is attributed to the accumulation of irradiation-induced discrete point defects, is presented. Secondly, in the intermediate fluences ranging from 8 × 10 16 to 1 × 10 17 cm -2 with corresponding dpa varying from 2.33 to 2.91, a large drop of elastic strain occurs accompanied by presence of an intensive damage region, which is comprised by large and interacted defect clusters. Thirdly, at the two high fluences of 2 × 10 17 and 4 × 10 17 cm -2, of which dpa are 5.83 and 11.65 respectively, a great amount of ribbon-like He bubbles with granular structure and cracks are presented at the depth of maximum concentration of deposited He atoms. The structural damage evolution and the mechanism of formation of He bubbles are discussed.
UR - https://www.scopus.com/pages/publications/82055193996
U2 - 10.1016/j.jnucmat.2011.10.033
DO - 10.1016/j.jnucmat.2011.10.033
M3 - Article
AN - SCOPUS:82055193996
SN - 0022-3115
VL - 420
SP - 430
EP - 436
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 1-3
ER -