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双涂层和梯度涂层改善SiC_f/Al界面性能的微观机制
Mecromechanism of improving the interface properties of SiC_f/Al composite by fiber modification with double and gradient coating
查看参考文献8篇
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文摘
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研究了双涂层（RD）和梯度涂层（RG）处理改善SiC_f /Al界面和复合材料性能的微观机制。发现RD试样中纤维外涂层氮化硼（BN）阻挡了Al向界面内层C的扩散。从而阻止Al、C脆性相的生成。同样RG试样中C、Si梯度分布阻碍Al、C脆性相的形成。故这二种涂层处理均较单C涂层较好地改善了界面和复合材料性能。 |
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其他语种文摘
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The micromechanism of improving the interface properties of SiC_f /Al composite using fiber surface modification with double and gradient coating has been studied by cold field emission scanning electromicroscope and acoustic emission method. It was found that BN coating outride of fiber prevented Al from diffusion toward inner C in interface. As a result, the brittle phase of Al、C compound could not be formed in interface. Similarly, RG coating prevented the brittle phase of Al, C compound from producing in interface. Therefore, the properties of interface and SiC_f /Al composite could be improved with above fiber surface modification. Whereas the protection of BN coating was destroyed by over high temperature and pressure which made violent diffusion of Al across BN obstruction. As a result, protection of interface with double coating degenerated. Moreover, the property of interface with rich C was poor due to forming the brittle compound of Al, C. |
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来源
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材料研究学报
,2002,16(1):67-73 【核心库】
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关键词
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SiC_f/A复合材料
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纤维涂层处理
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界面性能
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地址
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中国科学院金属研究所, 材料疲劳断裂国家重点实验室
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1005-3093 |
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学科
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一般工业技术 |
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基金
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国家自然科学基金
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文献收藏号
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CSCD:960033
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参考文献 共
8
共1页
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