Thermal Stability Characterization of SiC Ceramic Fibers: II, Fractography and Structure
Thermal Stability Characterization of SiC Ceramic Fibers: II, Fractography and Structure
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DOI：
10.1002/9780470320341.ch19
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发表时间：
2008-03
期刊：
影响因子：
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通讯作者：
L. Sawyer;R. T. Chen;F. Haimbach;P. J. Harget;E. Prack;M. Jaffe
中科院分区：
文献类型：
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作者：
L. Sawyer;R. T. Chen;F. Haimbach;P. J. Harget;E. Prack;M. Jaffe
SiC陶瓷纤维（Nicalon）在高于1200 ℃的空气、氩气和氮气环境中热处理后表现出拉伸强度降低。通过X射线衍射和电子显微镜观察了处理后纤维的晶粒尺寸变化。断口分析研究表明，强度降低发生在所有的热处理，虽然纤维失效的机制取决于特定的环境。由于热处理纤维的力学测试和断口分析与拉伸强度损失机制有关，因此将开发结构-性能关系。16篇参考文献。
SiC ceramic fibers (Nicalon) exhibit tensile strength reduction following thermal treatment in air, argon and nitrogen environments above 1200 C. Grain-size variations have been observed in the treated fibers by X-ray diffraction and electron microscopy. Fractography studies show that strength reduction occurs in all thermal treatments, although the mechanism of fiber failure varies depending upon the specific environment. Structure-property relations will be developed as mechanical testing and fractography of the thermally treated fibers are associated with tensile strength loss mechanisms. 16 references.