...
首页> 外文期刊>日本セラミックス協会学術論文誌 >Role of Sintering Aids in Phase Transfomation, Microstructure and Mechanical Properties of Si_3N_4/SiC Nanocomposites
【24h】

Role of Sintering Aids in Phase Transfomation, Microstructure and Mechanical Properties of Si_3N_4/SiC Nanocomposites

机译:烧结助剂在Si_3N_4 / SiC纳米复合材料的相变,组织和力学性能中的作用

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       

摘要

Details of #alpha#->#beta# Si_3N_4 phase transformation, microstructural development and mechanical properties of SiC reinforced-SiN_4 matrix nanocomposites were investigated. Two sinterined aid systems were used: 7.5 mass% MgAl_2O_4 + 7.5 mass% ZrO_2 (MA-Z) and 10 mass% Y_2O_3 + 4 mass% Al_2O_3 (Y-A). The MA-Z system enhanced #alpha# -> #beta# phase transformation at low temperatures (1400-1550 deg C), which was interpreted to arise from nucloeation of #beta#->Si_3N_4 upon the SiC addition. This phenomenon was not observed in composites added with the Y-A system. Due to a large number of #beta#-Si_3N_4 nuclei, microstructure of Si_3N_4/SiC nanocomposites added with the MA-Z system exhibited a reduced grain growth and high flexural strength.
机译:研究了SiC增强SiN_4基纳米复合材料的#alpha#->#beta#Si_3N_4相变,微观结构发展和力学性能。使用了两种烧结助剂系统:7.5质量%MgAl_2O_4 + 7.5质量%ZrO_2(MA-Z)和10质量%Y_2O_3 + 4质量%Al_2O_3(Y-A)。 MA-Z系统增强了低温(1400-1550摄氏度)下的#alpha#->#beta#相变,这被解释为由于添加SiC后#beta#-> Si_3N_4的核化而产生。在添加Y-A系统的复合材料中未观察到此现象。由于存在大量的#beta#-Si_3N_4原子核,因此添加了MA-Z系统的Si_3N_4 / SiC纳米复合材料的微观结构表现出降低的晶粒长大和较高的抗弯强度。

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