Funding for this research was provided by:
National Natural Science Foundation of China (51502268)
China Postdoctoral Science Foundation (2012M521406)
Excellent Young Teacher Development Foundation of Zhengzhou University (1421320050)
Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructure (SKL201310SIC)
Key Science and Technology Research Projects of Henan Provincial Education Department (14B430023)