Guan-Jun Yang, Ph.D. is a professor at the State Key Laboratory for Mechanical Behavior of Materials and the Director of the Center for Thermal Spray and Hybrid Materials at Xi`an Jiaotong University in Xi`an China. Dr. Yang’s research interests include coating/thin film technologies for wear or corrosion resistance, thermal insulation, photocatalyst, solar cells and fuel cells. Dr. Yang has co-authored over 150 peer-reviewed journal papers and holds over 20 patents.