Behaviour of coatings on reinforcements in some metal matrix composites
Behaviour of coatings on reinforcements in some metal matrix composites
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DOI：
10.1016/1359-835x(96)00072-3
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发表时间：
1996-01-01
影响因子：
8.7
通讯作者：
Zhou, BL
中科院分区：
文献类型：
--
作者：
Wang, YQ;Zhou, BL
在增强材料上涂覆涂层会影响复合材料的界面结合，因此通常用于改善复合材料的性能。研究了碳纤维增强铝铸件中碳化硅涂层、碳纤维增强铜件上的铁涂层和K2O上的氧化铝涂层的行为。以6TiO2晶须增强铝基复合材料为研究对象，采用透射电子显微镜、扫描电子显微镜等现代技术手段，研究了6TiO2晶须增强铝基复合材料的界面相互作用和润湿性。通过聚碳硅烷溶液工艺制备的碳化硅涂层有效地提高了强度，因为它成功地控制了碳纤维本身的氧化，以及在复合材料的制备过程和加热过程中碳纤维与铝熔体之间的有害反应。由电镀制成的金属涂层Fe通过将界面的结合状态从机械结合状态改变为部分化学结合状态，加强了碳纤维与铜的结合。因此，得到的复合材料的强度得到了提高。K2O表面的氧化铝涂层。6TiO2还控制了K元素从晶须向铝基的扩散，改变了晶须与铝的反应，优化了晶须与铝基复合材料的界面结合。版权所有(C)1996爱思唯尔科学有限公司
Coating on reinforcements affects the interface bonding of a composite, and is therefore usually used for improving the composite's properties. The behaviour of SiC coating on carbon fibre in reinforced aluminium metal castings, Fe on carbon fibre-reinforced copper and alumina coating on K2O . 6TiO(2) whisker-reinforced aluminium composites were investigated, respectively, by modern techniques such as TEM, SEM etc. with the goal of controlling the interfacial interaction and wettability of reinforcement with the matrices. SiC coating produced by a polycarbosilane solution process effectively improved the strength because it successfully controlled oxidation of the carbon fibres themselves and the harmful reaction between the carbon fibres and molten aluminium during the fabrication process and heating process of the composites. The metal coating, Fe, made by electrical plating, strengthened the bonding of carbon fibres with copper by changing the bonding state of the interface from a mechanical one to a partly chemical one. Therefore the strengths of the resulting composites were improved. The alumina coating on K2O . 6TiO(2) also controlled the diffusion of the K element from the whiskers into the aluminium matrix and altered the reaction with aluminium, and led to the optimization of interfacial bonding between the whiskers and a superior composite. Copyright (C) 1996 Elsevier Science Limited