炭化物粒子分散によるムライトの高強度化に関する研究 : 第2報, 添加SiC粒子径と熱処理の影響
炭化物粒子分散によるムライトの高強度化に関する研究 : 第2報, 添加SiC粒子径と熱処理の影響
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通过分散碳化物颗粒提高莫来石强度的研究：第二次报告，添加的 SiC 粒径和热处理的影响
DOI：
10.1299/kikaia.61.1023
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
柱 安藤
中科院分区：
文献类型：
--
作者：
繁美 佐藤;康良 小林;柱 安藤
莫来石复相陶瓷含20 vol. %分散的SiC颗粒（0. 12-1. 71μm），在1650°C、35 MPa下热压4 h制备。研究了分散颗粒尺寸对力学性能的影响。基体中弥散SiC颗粒的存在阻碍了莫来石晶粒的长大，莫来石/SiC复合材料的基体晶粒尺寸随着弥散SiC颗粒尺寸的减小而减小。结果表明，莫来石/SiC复合材料的抗弯强度随分散颗粒尺寸的减小而增大。在莫来石/SiC（0. 56μm），抗弯强度最大值为626 MPa，比莫来石整体抗弯强度提高了60%左右。研究了热处理气氛对莫来石/SiC复合材料抗弯强度的影响。得出的结论是，在空气中的热处理的强化是由于愈合的表面缺陷的试样。
Mullite composite ceramics contaning 20vol. % dispersed SiC particles (0. 12-1. 71μm) were prepared by hot-pressing at 1650°C under 35MPa for 4h. The effect of dispersed particle size on mechanical properties was investigated. Grain growth of mullite was prevented by the existence of dispersed SiC particles in the matrix, and the matrix grain size of mullite/SiC composites decreased with decreasing dispersed SiC particle size. As a result, bending strength for most mullite/SiC composites increased with decreasing dispersed particle size. In the case of mullite/SiC (0. 56μm), bending stregth showed a maximum value of 626MPa, which was about 60% higher than that of monolithic mullite. The influence of atmosphere of thermal treatment on bending strength of mullite/SiC composites was also investigated. It is concluded that the strengthening by thermal treatment in air was caused by healing of surface flaws in the specimen.