1. Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin300350People's Republic of China
2. School of Materials Science and EngineeringTianjin UniversityTianjin300350People's Republic of China
3. Department of Materials Science and EngineeringVirginia TechBlacksburgVA24061USA
4. Bradley Department of Electrical and Computer EngineeringVirginia TechBlacksburgVA24061USA