The mechanical properties of C/C-ZrC-SiC composites after laser ablation |
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| Affiliation: | 1. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China;2. Nanjing Totem Tool Co. Ltd, Nanjing 211215, PR China;1. College of Materials and Chemistry, China Jiliang University, Magnetism Key Laboratory of Zhejiang Province, Hangzhou 310018, China;2. Yichang Testing Technique R&D Institute, YiChang, China;1. Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, 410073, China;2. Northwest Institute of Nuclear Technology, Xi''an, 710024, China;1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;2. Hunan Aerospace Institute of Electromechanical Device & Special Material, Changsha 410205, China;1. Hubei Longzhong Laboratory, Wuhan University of Technology Xiangyang Demonstration Zone, Xiangyang 441000, China;2. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China;3. School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China |
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| Abstract: | Considering practical environment, the bending property of C/C-ZrC-SiC, C/C-SiC and C/C composites after ablation was worthily studied. Results revealed that C/C-ZrC-SiC composites had a better laser ablation resistance and higher bending strength retention compared with C/C-SiC and C/C composites. The mass loss rate and ablated depth of C/C-ZrC-SiC composites was ? 0.09% and 190.377 μm, respectively. The retention of bending strength of C/C-ZrC-SiC composites was 217.67 ± 44.12 MPa, whose strength decreased by 3.57% compared with that of as-prepared C/C-ZrC-SiC composites. The excellent anti-ablation property and residual bending strength of C/C-ZrC-SiC composites were attributed to the lowest ablative temperature and the effective protection of the ZrO2 grain and ZrO2-SiO2 layer, which were formed by oxidation of ZrC-SiC, evaporation of SiO2, migration of liquid ZrO2-SiO2 and the infiltrated as well as grown ZrO2. However, the fracture behavior transformation of composites from pseudo-plastic rupture to brittle rupture was induced by the ablation damage. |
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| Keywords: | C/C-ZrC-SiC composites Laser ablation resistance Laser ablation mechanism Transformation of flexural properties |
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