Fabrication and high-temperature mechanical properties of 2.5DSi3N4f/BN fiber-reinforced ceramic matrix composite
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- 作者：Chunrong Zoua ; Bin Lia ; libin@nudt.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Siqing Wanga ; Changrui Zhanga ; Yangxi Songb ; Zhengfang Xiea ; Changwei Shaoa
- 关键词：Ceramic matrix composites ; High-temperature properties ; Mechanical properties ; Interface ; Oxidation
- 刊名：Materials & Design
- 出版年：2016
- 出版时间：15 February 2016
- 年：2016
- 卷：92
- 期：Complete
- 页码：335-344
- 全文大小：2963 K
文摘
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A dense boron nitride matrix composite with braided silicon fibers was fabricated by borazine infiltration and pyrolysis method.
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The precursor derived boron nitride matrix was turbostratic in microstructure with a low interlayer spacing of 3.44 Ǻ.
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A thin layer of highly ordered boron nitride matrix was observed to align parallel to the fiber surface.
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The composite retained a desirable in-situ bending strength of 73.4 MPa after held at 1300 °C for 30 min.
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The presence of viscous SiO2-rich glass above 1200 °C led to the passive oxidation of the composite.
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