| Ablation properties of C/C composites with various needled preforms prepared by isothermal chemical vapor infiltration |
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| 作者姓名： | 汤素芳 王道岭 邓景屹 刘文川 杨柯 |
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| 作者单位： | Institute of Metal Research Chinese Academy of Sciences，Institute of Metal Research，Chinese Academy of Sciences，Institute of Metal Research，Chinese Academy of Sciences，Institute of Metal Research，Chinese Academy of Sciences，Institute of Metal Research，Chinese Academy of Sciences，Shenyang 110016，China，Shenyang 110016，China，Shenyang 110016，China，Shenyang 110016，China，Shenyang 110016，China |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | The ablation properties of C/C composites with four different needled preforms prepared by isothermal chemical vapor infiltration (ICVI),which are super-thin mat lay-up,0°/90° weftless fabric lay-up,0°/45° weftless fabric lay-up and 0°/45° twill fabric lay-up,were quantitatively evaluated by performing the ablation tests with an engine torch.And their ablation discrepancies were analyzed according to the surface characteristic,porosity and thermal diffusivity.The results show that the 0°/45° weftless composite has a flat eroded surface with no obvious macroscopic pits.Its thickness and mass erosion rates are decreased by about 46.8% and 34.8%,25.0% and 27.5%,and 17.5% and 19.4% compared with those of the mat,the 0°/90° weftless and the 0°/45° twill composites,respectively.The ablation properties are mainly controlled by the thermo-chemical effect (oxidation),and a little by the thermo-mechanical effect (mechanical denudation).The needling fiber bundles play an important role in accelerating the ablation process and resulting in the heterogeneous ablation.
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| 关 键 词： | 烧蚀 纤维构筑 等温蒸汽 热扩散 |
| 收稿时间： | 8 May 2006 |
| 修稿时间： | 2006-05-08 |
Ablation properties of C/C composites with various needled preforms prepared by isothermal chemical vapor infiltration |
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| Tang Su-fang , Wang Dao-ling , Deng Jing-yi , Liu Wen-chuan and Yang Ke.Ablation properties of C/C composites with various needled preforms prepared by isothermal chemical vapor infiltration[J].Journal of Central South University of Technology,2007,14(1):13-18. |
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| Authors: | Tang Su-fang Wang Dao-ling Deng Jing-yi Liu Wen-chuan and Yang Ke |
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| Affiliation: | Institute of Metal Re search, Chinese Academy of Sciences, Shenyang 110016, China |
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| Abstract: | The ablation properties of C/C composites with four different needled preforms prepared by isothermal chemical vapor infiltration
(ICVI), which are super-thin mat lay-up, 0°/90° weftless fabric lay-up, 0°/45° weftless fabric lay-up and 0°/45° twill fabric
lay-up, were quantitatively evaluated by performing the ablation tests with an engine torch. And their ablation discrepancies
were analyzed according to the surface characteristic, porosity and thermal diffusivity. The results show that the 0°/45°
weftless composite has a flat eroded surface with no obvious macroscopic pits. Its thickness and mass erosion rates are decreased
by about 46.8% and 34.8%, 25.0% and 27.5%, and 17.5% and 19.4% compared with those of the mat, the 0°/90° weftless and the
0°/45° twill composites, respectively. The ablation properties are mainly controlled by the thermo-chemical effect (oxidation),
and a little by the thermo-mechanical effect (mechanical denudation). The needling fiber bundles play an important role in
accelerating the ablation process and resulting in the heterogeneous ablation.
Foundation item: Project(200202AA305207) supported by the National High Technology Research and Development Program of China |
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| Keywords: | C/Ccomposites ablation fiber architecture isothermal chemical vapor infiltration thermal diffusivity |
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