材料科学
复合材料
涂层
纤维
镁
碳化物
锡
镁合金
合金
基质(化学分析)
冶金
作者
M. Ottmüller,Carolin Körner,Robert F. Singer
标识
DOI:10.1002/3527606165.ch25
摘要
The mechanical properties of carbon fiber reinforced magnesium alloys strongly depend on the nature of the fiber-matrix interface. The interface strength is very low for pure magnesium since magnesium and C-fibers are a non-reactive system. As a result, the off-axis properties of the composites are rather poor. Two different approaches to enhance the interface strength are investigated: a) by carbide formation and b) by a TiN-fiber coating. The intensity of carbide formation increases with increasing aluminum content of the Mg-alloy and fiber reactivity. The formation of carbides produces a significant improvement of the off-axis properties at the expense of the in-axis strength. A TiN-coating inhibits the carbide formation. Improving the adhesion between fiber and matrix by a TiN-fiber coating enables a significant increase of the off-axis properties without negative influence on the in-axis strength.
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