• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ceramic Engineering and Science Proceedings >DEVELOPMENT OF NOVEL FABRICATION PROCESS FOR HIGHLY-DENSE & POROUS SiC/SiC COMPOSITES WITH EXCELLNT MECHANICAL PROPERTIES
【24h】

DEVELOPMENT OF NOVEL FABRICATION PROCESS FOR HIGHLY-DENSE & POROUS SiC/SiC COMPOSITES WITH EXCELLNT MECHANICAL PROPERTIES

机译：具有优异力学性能的高密度多孔SiC / SiC复合材料的新型制备方法的开发

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

Unidirectional continuous carbon coated SiC fiber-reinforced SiC matrix composites are prepared by nano-infiltration and transient eutectic phase (NITE) process using SiC "nano"-slurry infiltration technique and pressure sintering, and the effects of fiber volume fraction of sintering temperature evolutions on the microstructure and mechanical properties were characterized. Densification of the composites with standard fiber volume fraction (appropriately 30vol%) was developed even at lower sintering temperature and then saturated at 3rd stage of matrix densification. Hence densification of the composites with high volume fraction (above 50vol%) became restricted because the fibers retarded the infiltration of SiC nano-particles at lower temperature. With the increase of sintering temperature, density of the composites dramatically increased and simultaneously, the interaction between fiber and matrix was strengthened. SEM observation on the fracture surface revealed that fiber pull-out length is accordingly changed with sintering temperature as well as fiber volume fraction, resulting in the variation of tensile fracture behavior. SiC/SiC composites of various fracture types were successfully developed by NITE process as follows: (1) High ductility (highly dense & porous) composites and (2) High strength (highly dense) composites.
机译：采用SiC“纳米”浆料浸渗技术和压力烧结法，通过纳米浸渗和瞬态共晶（NITE）工艺制备了单向连续碳包覆SiC纤维增强SiC基复合材料，并考察了烧结温度演变对纤维体积分数的影响。表征了组织和力学性能。即使在较低的烧结温度下，也可以进行具有标准纤维体积分数（约30vol％）的复合材料的致密化，然后在基体致密化的第三阶段达到饱和。因此，由于纤维在较低的温度下阻碍了SiC纳米颗粒的渗透，因此高体积分数（超过50vol％）的复合材料的致密化受到限制。随着烧结温度的升高，复合材料的密度急剧增加，同时，纤维与基体之间的相互作用增强。断面的SEM观察表明，纤维的拉出长度随烧结温度以及纤维体积分数的变化而变化，从而导致拉伸断裂行为的变化。通过NITE工艺成功开发了各种断裂类型的SiC / SiC复合材料，具体如下：（1）高延展性（高密度和多孔性）复合材料;（2）高强度（高密度）的复合材料。

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