1. A. J. Drexel Nanomaterials Institute and Department of Materials Science and EngineeringDrexel University Philadelphia PA 19104 USA
2. Science and Technology on Thermostructural Composite Materials LaboratoryNorthwestern Polytechnical University Xi'an Shaanxi 710072 China
3. Materials Architecturing Research CenterKorea Institute of Science and Technology (KIST) Seoul 02792 Republic of Korea
4. Murata Manufacturing Co., Ltd Ltd. 10‐1‐1, Higashikotari Nagaokakyo‐shi Kyoto 617‐8555 Japan