自蔓延法在金刚石表面形成碳硼化铝涂层的研究  

Formation of aluminum boron carbide coating on the surface of diamond by self-propagation

作　　者：王艳芝[1] 梁宝岩[1] 张旺玺[1] 刘嘉霖[1] 

机构地区：[1]中原工学院材料与化工学院,郑州450007

出　　处：《金刚石与磨料磨具工程》2014年第2期48-51,共4页Diamond & Abrasives Engineering

基　　金：河南省基础与前沿技术研究计划(132300410164);河南省省院科技合作项目(122106000051);河南省教育厅自然科学研究计划(12A430024;13A430128;14A430007)项目资助

摘　　要：采用Ti／Al／B／金刚石粉体为原料，通过自蔓延高温反应技术，制备了Al-TiB2结合剂金刚石复合材料，在金刚石表面合成了碳硼化铝涂层。采用X射线衍射（XRD）、扫描电镜（SEM）结合能谱仪（EDS）分析试样。研究结果表明：各种原料经自蔓延高温烧结后，产物的主相为Al、TiB2和金刚石。同时当Al质量分数较高时（60％～80％），在金刚石表面形成了致密的碳硼化铝涂层，呈薄片状，金刚石附近也生长出许多碳硼化铝晶粒，尺寸可达到几十微米。但是当Al质量分数较低（40％和50％）时，金刚石会发生严重的碎裂。Al-TiB2 boned diamond composites were sintering （SHS） from Ti/Al/B/Diamond powders fabricated by self-propagation high temperature The samples were analyzed by XRD, SEM and EDS. It was shown that Al-TiB2 boned diamond composites were obtained by SHS. The main phases of the products were Al, TiB2 and diamond by SHS from every raw material. Meanwhile, the Al4 BC coating was formed on the face of diamond. When mass fraction of Al was higher （60%-80%）, dense Al4BC coating with thin flake was formed. Meanwhile, many Al4BC grains also grown neighbor the diamond. These grains had dozes of micron. With mass fraction of Al decreasing to 40% and 50%,diamond broke because of its graphitization.

关 键 词：碳硼化铝涂层 金刚石 自蔓延高温烧结 

分 类 号：TQ164[化学工程—高温制品工业]