复合材料界面
(北京科技大学 新金属材料国家重点实验室, 北京 100083)
摘 要: 采用渗流铸造工艺制备了钨丝增强ZrTiCuNiBeNb金属玻璃基复合材料,利用X射线衍射、扫描电镜、电子探针以及Nano Indenter 纳米显微力学探针考察了复合材料的界面结构以及界面微区力学性能。 结果表明: 钨丝增强ZrTiCuNiBeNb金属玻璃基复合材料界面仅由单纯的界面溶解和扩散形成,并未发生界面反应,该界面应属于金属基复合材料的Ⅱ类界面; 并且溶解和扩散的存在使界面微区的硬度和弹性模量高于基体,界面结合较强,没有沿界面的裂纹扩展。
关键字: 渗流铸造; 金属玻璃; 复合材料; 界面结构
( State Key Laboratory for Advanced Metal and Materials, University of Science and Technology Beijing, Beijing 100083, China)
Abstract: W fiber reinforced ZrTiCuNiBeNb metallic-glass matrix composite was prepared by melt infiltration casting. The interface structure and mechanical properties were analyzed by using XRD, SEM, EPMA and Nano Indenter MPM(mechanical properties micro-probe). The results illustrate that the interface of ZrTiCuNiBeNb metallic-glass matrix composite is a simply diffusion-dissolution layer only and there is no interfacial reactions between W fibers and matrix. The composite is included as a class system according to the theory of interfaces in metal matrix composites. The hardness and elastic modulus of the interface are higher than those of the matrix. The interfacial bond is very strong and there isn’t propagation of the cracks along the interface.
Key words: melt infiltration casting; metallic glass; composite; interface structure