金刚石/铜复合材料的界面反应研究  

Interfacial Reaction of Diamond/Copper Composites

作　　者：王鹏鹏[1] 郭宏[1,2] 张习敏[1] 尹法章[1] 范叶明[1] 韩媛媛[1] 

机构地区：[1]北京有色金属研究总院国家有色金属复合材料工程技术研究中心,北京100088 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《稀有金属》2015年第4期308-313,共6页Chinese Journal of Rare Metals

基　　金：国家自然科学基金项目(50971020)资助

摘　　要：金刚石/铜复合材料(Diamond/Cu)的界面层相比基体与增强体有显著的化学成分变化,具有促进彼此结合、传递载荷的作用。Diamond/Cu复合材料作为热管理材料,热导率是一个关键性能参数。在众多影响因素中,界面对热导率的影响尤为重要。主要研究Diamond/Cu复合材料的界面组成,及成分梯度分布情况。通过扫描电子显微镜(SEM)观察复合材料断口形貌和界面区碳化铬的形态及分布,在近铜端,发现碳化铬以类鳞片状随机零散分布于铜与界面层的互扩散区,界面层处则集中堆垛为层状;采用能谱分析测试仪(EDS)对金刚石/铜复合材料界面区进行元素分布分析,发现各元素具有明显的过渡区域,根据实验结果可估算出过渡区域大约厚700 nm,碳化铬层大约厚400 nm;利用X射线衍射仪(XRD)对金刚石/铜复合材料的界面层进行物相分析,研究表明Diamond/Cu Cr复合材料中界面反应生成的碳化铬以3种形式存在,分别为Cr3C2,Cr7C3,Cr23C6。通过这些实验手段获取界面信息,如界面类型、界面结构、界面组成等,为进一步深入研究Diamond/Cu复合材料界面与性能的关系奠定坚实基础。There were significant changes in chemical composition of the interface of diamond/copper composite （Diamond/Cu） com- pared to the substrate and the reinforcement, which promoted the binding to each other and the load transmission. As a kind of thermal management material, the thermal conductivity of Diamond/Cu was a key performance parameter. The interface was particularly important to the thermal conductivity among many influence factors. The interface composition and the composition gradient distribution of Diamond/ Cu were mainly studied. The morphology and distribution of fracture appearance and the chromium carbide interface of the composite were observed through a scanning electron microscopy （SEM）. Near the Copper side, chromium carbides were found randomly scattered in the interdiffusion zone of the copper and the interface in form of flakes, but concentrated at the interface in layers; by means of energy disper- sive spectrometer （EDS） , the elemental distribution of Diamond/Cu interface was analyzed. The results showed that each element had a distinct transition region, with the thickness of transition region of about 700 nm, and the chromium carbide layer of about 400 nm; phase analysis of Diamond/Cu interface was conducted by X-ray diffraction （XRD）, showing that the generated chromium carbide existed in three forms, namely, Cr3 C2, Cr7 C3 , Cr23 C6. Through these experiments, some interface information was obtained, such as the interface type, interface structure, interface components, etc. , which laid a solid foundation for further studies on the relationships between dia- mond/copper composite interface and properties.

关 键 词：金刚石/铜复合材料 界面 界面反应 成分梯度 

分 类 号：TF125.34[冶金工程—粉末冶金]