• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>High temperature ceramic matrix compositei III >Processing and Characterisation of Silicon Carbide Fibre Reinforced MoSi_2-Based Composites
【24h】

Processing and Characterisation of Silicon Carbide Fibre Reinforced MoSi_2-Based Composites

机译：碳化硅纤维增强的MoSi_2基复合材料的加工与表征

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

MoSi_2 has a number of properties which make it attractive as a matrix material for various high temperature aerospace, automotive and structural applications. However, the use of MoSi_2 is currently limited by its low room temperature fracture toughness and high temperature creep behaviour. Substantial improvements in mechanical properties are necessary for component reliability. Reinforcing MoSi_2 with continuous fibres could achieve such improvements in mechanical properties. Fully dense continuous SCS-9 SiC fibre reinforced MoSi_2-based composites have been produced by a hot-pressing technique. The MoSi_2 matrix was modified with sialon powder to minimise the thermal expansion mismatch with the SiC fibre, thereby suppressing the matrix cracking. The fibres were coated with a protective SiC CVD layer to prevent the formation of any phase at the fibre/matrix interface. Microstructural and EDS analyses of interfacial regions have shown that the SiC coating has been successful in preventing any chemical interaction at the interface. The coating has been responsible for a significant improvement in toughness of the composites.
机译：MoSi_2具有许多特性，使其成为各种高温航空航天，汽车和结构应用的基质材料具有吸引力。但是，MoSi_2的使用目前受到其低室温断裂韧性和高温蠕变行为的限制。机械性能的显着提高对于组件的可靠性是必要的。用连续纤维增强MoSi_2可以改善机械性能。通过热压技术已经生产出了完全致密的连续SCS-9 SiC纤维增强MoSi_2基复合材料。 MoSi_2基体用赛隆粉末改性，以最大程度降低与SiC纤维的热膨胀失配，从而抑制基体开裂。纤维上涂有保护性SiC CVD层，以防止在纤维/基体界面形成任何相。界面区域的微结构和EDS分析表明，SiC涂层已成功地防止了界面上的任何化学相互作用。涂层已使复合材料的韧性显着提高。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号