中国有色金属学报(英文版)
中國有色金屬學報(英文版)
중국유색금속학보(영문판)
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2014年
11期
3562-3570
,共9页
Walid M. DAOUSH%Hee S. PARK%Soon H. HONG
Walid M. DAOUSH%Hee S. PARK%Soon H. HONG
Walid M. DAOUSH%Hee S. PARK%Soon H. HONG
熔盐反应%钛%沉积%立方氮化硼%金刚石%涂层%TiN%TiC
鎔鹽反應%鈦%沉積%立方氮化硼%金剛石%塗層%TiN%TiC
용염반응%태%침적%립방담화붕%금강석%도층%TiN%TiC
molten salt reaction%titanium%deposition%cubic boron nitride%diamond%coating%TiN%TiC
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。
用鈦鎔鹽沉積及熱處理工藝分彆製備碳化鈦塗覆的立方碳化硼顆粒(TiN/cBN)及碳化鈦塗覆的金剛石顆粒(TiC/金剛石)。將cBN或金剛石顆粒分彆與鈦粉和KCl、NaCl和K2TiF6鎔鹽混閤。將所得混閤物在Ar氣氛中加熱至900°C,然後在H2氣氛中于1000°C進行熱處理。採用掃描電鏡、X射線衍射和聚焦離子束技術對所製得顆粒進行錶徵。結果錶明:cBN和金剛石顆粒錶麵已覆蓋瞭納米鈦層。對Ti/cBN和TiC/金剛石塗層顆粒進行熱處理後,顆粒錶麵沉積的Ti層與cBN和金剛石顆粒髮生瞭原位化學反應,分彆轉化為鈦化閤物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.