• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Conference on Advanced Ceramics and Composites >OPTIMIZATION OF AN INTERPHASE THICKNESS IN HOT-PRESSED SiC_f/SiC COMPOSITES
【24h】

OPTIMIZATION OF AN INTERPHASE THICKNESS IN HOT-PRESSED SiC_f/SiC COMPOSITES

机译：热压SIC_F / SIC复合材料中的相互作用厚度优化

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The effects of the thickness of PyC interphase on the properties of hot-pressed SiCf/SiC composites were investigated. Slurries of SiC nano-powders containing Al_2O_3/Y_2O_3/MgO sintering additives were infiltrated into the SiC fiber preform with various PyC thicknesses of 200-1000 nm. Densification behavior, microstructural evolution, and mechanical properties of the hot-pressed composites were evaluated. The hot-pressed composite revealed an optimum interphase thickness which was larger than the CVI composite. Density of the hot-pressed composites decreased as the PyC thickness increased. Decrease of the density with the PyC thickness was attributed to the limitation of the slurry infiltration within the SiC fiber bundles. The SiCf/SiC composites with the PyC thicknesses of 200 and 400 nm showed brittle fracture behaviors due to the elimination of the PyC interphase by the reaction between the oxide phases and PyC during fabrication. However, the composites with the PyC coating of more than 600 nm exhibited pseudo-ductile fracture behaviors with higher strengths.
机译：研究了PYC厚度对热压SICF / SiC复合材料的性能的影响。含有Al_2O_3 / Y_2O_3 / MGO烧结添加剂的SiC纳米粉末的浆料渗透到SiC纤维预制棒中，厚度为200-1000nm。评估了热压复合材料的致密化行为，微观结构演化和机械性能。热压复合材料显示出比CVI复合材料大的最佳相位厚度。随着PYC厚度的增加，热压复合材料的密度降低。脓液厚度的密度降低归因于SiC纤维束内的浆料浸润的限制。具有200和400nm的Pyc厚度的SiCF / SiC复合材料显示出由于在制造期间通过氧化物相和Pyc之间的反应而消除PIC差异，因此脆性断裂行为显示出脆性断裂行为。然而，具有超过600nm的Pyc涂层的复合材料表现出具有更高强度的假延展性断裂行为。

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