CAJ | 학술논문

用钛熔盐沉积及热处理工艺分别制备碳化钛涂覆的立方碳化硼颗粒(TiN/cBN)及碳化钛涂覆的金刚石颗粒(TiC/金刚石)。将cBN或金刚石颗粒分别与钛粉和KCl、NaCl和K2TiF6熔盐混合。将所得混合物在Ar气氛中加热至900°C，然后在H2气氛中于1000°C进行热处理。采用扫描电镜、X射线衍射和聚焦离子束技术对所制得颗粒进行表征。结果表明：cBN和金刚石颗粒表面已覆盖了纳米钛层。对Ti/cBN和TiC/金刚石涂层颗粒进行热处理后，颗粒表面沉积的Ti层与cBN和金刚石颗粒发生了原位化学反应，分别转化为钛化合物TiN和TiC。
용태용염침적급열처리공예분별제비탄화태도복적립방탄화붕과립(TiN/cBN)급탄화태도복적금강석과립(TiC/금강석)。장cBN혹금강석과립분별여태분화KCl、NaCl화K2TiF6용염혼합。장소득혼합물재Ar기분중가열지900°C，연후재H2기분중우1000°C진행열처리。채용소묘전경、X사선연사화취초리자속기술대소제득과립진행표정。결과표명：cBN화금강석과립표면이복개료납미태층。대Ti/cBN화TiC/금강석도층과립진행열처리후，과립표면침적적Ti층여cBN화금강석과립발생료원위화학반응，분별전화위태화합물TiN화TiC。
Cubic boron nitride particles coated by titanium nitride (TiN/cBN) as well as diamond particles coated by titanium carbide (TiC/diamond) were prepared by Ti molten salt deposition followed by heat-treatment process. cBN or diamond particles were mixed separately with Ti powders and molten salts (KCl, NaCl and K2TiF6). The mixture was heated at 900 °C under argon atmosphere. The produced particles were heat-treated under hydrogen at 1000 °C. The morphologies and chemical compositions of the produced particles were investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD) and focused ion beam (FIB). The results show that the cBN and the diamond particles are coated by nano-sized Ti layers. By heat-treatment of the Ti/cBN and TiC/diamond coated particles under hydrogen atmosphere, the deposited Ti layers were interacted by the in-situ transformation reaction with the surfaces of cBN and diamond particles and converted to titanium compounds (TiN and TiC), respectively.