1. Science and Technology on Thermostructural Composite Materials LaboratoryNorthwestern Polytechnical UniversityXi'anShaanxi 710072P. R. China
2. Material and Special Process Technology DepartmentAVIC Qingan Group Co., LtdXi'anShaanxi 710072P. R. China
3. Department of Materials and Environmental ChemistryArrhenius LaboratoryStockholm UniversityStockholm 11418Sweden
4. Sinosteel Luoyang Institute of Refractories Research Co., LtdLuoyangHenan 471039P. R. China