Formation, thermal stability and deformation behavior of graphite-flakes reinforced Cu-based bulk metallic glass matrix composites
Formation, thermal stability and deformation behavior of graphite-flakes reinforced Cu-based bulk metallic glass matrix composites
复制标题
石墨片增强铜基大块金属玻璃基复合材料的形成、热稳定性及变形行为
DOI：
10.1016/j.msea.2006.07.040
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发表时间：
2006-11-05
期刊：
影响因子：
6.4
通讯作者：
Geng, J. Y.
中科院分区：
文献类型：
--
作者：
Sun, Y. F.;Shek, C. H.;Geng, J. Y.
采用水冷铜模铸造法制备了片状石墨增强Cu 47 Ti 34 Zr 11Ni-8块体非晶复合材料。大部分的石墨片仍然保持未反应，并均匀地分布在非晶基体中，除了一些反应性润湿发生在周围的TiC颗粒的形成。结果表明，石墨片的存在不影响金属玻璃的玻璃化转变温度、晶化反应和液相线。在室温压缩载荷作用下，该材料表现出明显的锯齿状流动，断裂强度高于整体块体金属玻璃（BMG）。通过准静态单轴压缩试验和Vickers压痕结合界面技术，观察到剪切带与石墨片之间存在三种类型的相互作用，即剪切带终止、剪切带分叉和新剪切带在石墨片附近形成。(c)2006 Elsevier B. V.保留所有权利。
Graphite-flake reinforced Cu47Ti34Zr11 Ni-8 bulk metallic glass matrix composite was fabricated by water-cooled copper mould cast. Most of the graphite flakes still keep unreacted and distribute uniformly in the amorphous matrix except that some reactive wetting occurs by the formation of TiC particles around the flakes. It reveals that the presence of graphite flakes does not affect the onset of the glass transition temperature, crystallization reaction and liquidus of the metallic glass. The resulting material shows obvious serrated flow and higher fracture strength under room temperature compressive load, comparing with the monolithic bulk metallic glass (BMG). Three types of interaction between the shear bands and graphite flakes, namely, shear band termination, shear bands branching and new shear bands formation near the graphite flakes can be observed by quasi-static uniaxial compression test and bonded interface technique through Vickers indentation. (c) 2006 Elsevier B.V. All rights reserved.