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| Micro-structure Control of Pyrocarbon and Nano Indentation Test |
| Received:January 12, 2016 Revised:June 15, 2016 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2016.03.013 |
| KeyWord:precursor pyrocarbon microstructure nano indentation |
| Author | Institution |
| FANG Jin-ming |
Aerospace Materials and Technology Research Institute, Science and Technology on Advanced Functional Composites Laboratory, Beijing , China |
| FENG Zhi-hai |
Aerospace Materials and Technology Research Institute, Science and Technology on Advanced Functional Composites Laboratory, Beijing , China |
| ZHANG Zhong-wei |
Aerospace Materials and Technology Research Institute, Science and Technology on Advanced Functional Composites Laboratory, Beijing , China |
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| Abstract: |
| Objective To study the influence of precursor for the pyrocarbon texture and the property of pyrocarbon. Method Methane was used as the main precursor, and deposition experiment was conducted on carbon cloth stitched preform after adding 5% propylene. After that, nano indentation experiment was performed for the deposited pyrocarbon samples with different textures. Results It was found that higher deposition efficiency was got at lower experiment temperature when propylene was added as compared to pure methane, and different pyrocarbon texture was obtained at different stages. The hardness and modulus of different samples were measured by the nano indentation method. It was found that the texture of pyrocarbon in the bundle had obvious influence on the materials’ properties. When the pyrocarbon texture in fiber bundle was ISO, the strength and modulus in the bundle were relatively higher, with values of 3.96 GPa and 32.0 GPa, respectively, and the fraction mode was brittle fracture. When the pyrocarbon texture in fiber bundle was RL, the strength and modulus in the bundle were relatively lower, with values of 1.93 GPa and 19.7 GPa, respectively, and the fracture mode was pseudoplastic fracture. Conclusion The types of precursor had great influence on the structure of pyrolytic carbon, and the material properties had obvious difference. |
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