1. Research Center of Solar Power & RefrigerationSchool of Mechanical EngineeringShanghai Jiao Tong University Shanghai 200240 P. R. China
2. University of Michigan‐Shanghai Jiao Tong University Joint InstituteShanghai Jiao Tong University Shanghai 200240 P. R. China
3. State Key Laboratory of Metal Matrix CompositesSchool of Materials Science and EngineeringShanghai Jiao Tong University Shanghai 200240 P. R. China