Atomic oxygen damage behavior of TaC coating-modified C/C composite |
| |
| Affiliation: | 1. Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi’an, 710072, China;2. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China;1. Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi’an, 710072, PR China;2. Technische Universität Darmstadt, Institut für Materialwissenschaft, Otto-Berndt-Str. 3, D -64287, Darmstadt, Germany;3. NPU-TU Darmstadt Joint International Research Laboratory of Ultrahigh Ceramic Matrix Composites, Northwestern Polytechnical University, Xi’an, 710072, PR China;4. Key Laboratory of High Performance Ceramic Fibers (Xiamen University), Ministry of Education, Xiamen, 361005, PR China;5. College of Materials, Fujian Key Laboratory of Advanced Materials (Xiamen University), Xiamen 361005, China;1. State Key Laboratory of Solidification Processing, Carbon/carbon Composites Research Center, Northwestern Polytechnical University, Xi''an, 710072, China;2. Shenzhen Research Institute of Northeastern Polytechnical Uinversity, Shenzhen, 518057, China;1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;2. Advanced Research Center, Central South University, Changsha 410083, China |
| |
| Abstract: | Groups of carbon/carbon (C/C) and tantalum carbide (TaC)-coated C/C composite specimens were studied under exposure to atomic oxygen (AO). Low earth orbit ground-based simulator was employed. Degradation mechanisms were investigated by scanning electron microscopy, X-ray photoelectron spectroscopy, and energy dispersive spectrometry. The results indicated that compared to C/C composite, TaC-coated C/C composite exhibited improvements in resistance properties against AO flux, such as 16.7% better strength retention ratio and 57% less mass ablation than non-coated C/C after 40 h of AO exposure. Moreover, AO preferentially consumed tantalum (Ta) atoms than carbon atoms of TaCx till atomic ratio was in the same proportion. Production of swollen tantalum oxide and crack healing components were obtained under the oxidation effect of high-speed AO. Swelling textures due to exposure were developed following an apical dominance growth behavior. The damage mechanisms of AO on TaC-coated C/C were revealed as chemical reaction first followed by mechanical effect. |
| |
| Keywords: | Carbon/carbon Tantalum carbide-carbon/carbon composite Low earth orbit Atomic oxygen Swell |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
