脱钴处理对YG8硬质合金刀片上金刚石形核的影响  

EFFECT OF COBALT-ETCHED TREATMENT ON DIAMOND NUCLEATION ONT0 C0BALT CEMENTED CARBIDE SUBSTRATE

作　　者：匡同春[1] 成晓玲[1] 白晓军[1] 张海燕[1] 吴朝东 邱万奇[2] 刘正义[2] 金展鹏[3] 

机构地区：[1]广东工业大学,广州510090 [2]华南理工大学,广州510641 [3]中南工业大学,长沙410083

出　　处：《硬质合金》1999年第4期215-217,共3页Cemented Carbides

基　　金：广东省博士启动基金!994383

摘　　要：对比分析了经金刚石磨盘研磨、脱铅、未脱钻YG8硬质合金上蒸镀非晶碳膜对金刚石形核的影响．结果表明未脱钴YG8硬质含金上沉积金刚石膜时，即使蒸镀非晶碳膜，金刚石的形核密度仍相当低．金刚石结晶质量差．颗粒呈“菜花状”。在长时间沉积金刚石过程中，基体内的Co会扩散或蒸发到刀片表面，产生明显的钴颗粒聚集、长大。而脱钴、蒸镀非晶碳膜YG8硬质含金上沉积金刚石膜时．成核密度可达108cm-2．金刚石结晶质量好，刻面轮廓分明．表面已基本成膜。The effects of diamond nucleation onto cobalt cemcn[ed carbide substrates ground with diamond diskes -cobalt-etched or not,plated with an amorphous carbon film have been compared and analyzed in the paper, Under the same conditions,the diamond deposited onto cobalt cemented carbide substrate without cobalt removal,even if deposited with an amorphous car-bon film. has a lower nucleatlon density and a poor quality .and shows a flower- like characteristic consisting of many micro-crystal diamonds. During the long time deposition of diamond film,cobalt particles were obviously assembed and grown by rneans of cobalt atom diffusion and evaporation from inner to insert surface. On the other hand .the diamond deposited onto Coba1t Cemented Carbide Substrate cobalt -etched and plaled with an amorphous carbon film has a higher nucleation density up to 108cm-2,good crystalline quality .well -defined facets .and forms a near continuous film.

关 键 词：脱钴 刀具 硬质合金 金刚石膜 预处理 形核密度 

分 类 号：TG711.04[金属学及工艺—刀具与模具]