復合材料界面
(北京科技大學 新金屬材料國家重點實驗室， 北京 100083)
摘 要: 采用滲流鑄造工藝制備了鎢絲增強ZrTiCuNiBeNb金屬玻璃基復合材料，利用X射線衍射、掃描電鏡、電子探針以及Nano Indenter 納米顯微力學探針考察了復合材料的界面結(jié)構(gòu)以及界面微區(qū)力學性能。 結(jié)果表明： 鎢絲增強ZrTiCuNiBeNb金屬玻璃基復合材料界面僅由單純的界面溶解和擴散形成，并未發(fā)生界面反應，該界面應屬于金屬基復合材料的Ⅱ類界面； 并且溶解和擴散的存在使界面微區(qū)的硬度和彈性模量高于基體，界面結(jié)合較強，沒有沿界面的裂紋擴展。
關(guān)鍵字: 滲流鑄造； 金屬玻璃； 復合材料； 界面結(jié)構(gòu)
LIU Xiong-jun, CHEN Guo-liang
（ 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
