1. State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University No. 28, Xianning West Road Xi'an Shaanxi 710049 P. R. China
2. Instrument Analysis Center of Xi'an Jiaotong University Xi'an Jiaotong University No. 28, Xianning West Road Xi'an Shaanxi 710049 P. R. China
3. Department of New Energy Project Northwest Engineering Corporation Limited POWERCHINA, No. 18, Zhangba East Road Xi'an Shaanxi 710065 P. R. China