1. School of Materials Science and Engineering
2. Xi’an University of Technology
3. Xi’an 710048
4. P.R. China
5. School of Chemistry and Chemical Engineering
6. Shaanxi Normol University
7. Xi’an 710119
8. P. R. China
9. Research Institute of Yanchang Petroleum (Group) CO. LTD
10. Xi’an 710075
11. State Key Laboratory for Mechanical Behavior of Materials
12. Xi’an Jiaotong University
13. Xi’an 710049