(1. 中南大學(xué) 粉末冶金國家重點(diǎn)實(shí)驗(yàn)室，長沙 410083；
2. 桂林特邦新材料有限公司，桂林 541004)
摘 要: 研究在金剛石表面鍍覆金屬鎢的新方法，即通過采用H2/H2O混合氣體在750~900 ℃下還原含催化劑的鎢的氧化物，利用鎢的氧化物在水蒸氣中的揮發(fā)特性及其化學(xué)氣相傳輸，在金剛石表面鍍覆金屬鎢。結(jié)果表明，該方法可在金剛石表面鍍覆上一層覆蓋面達(dá)到90%以上的金屬鎢膜，且生成穩(wěn)定的碳化物WC和W2C，得到由難熔金屬鎢包覆的金剛石。
關(guān)鍵字: 金剛石；鎢；鍍覆
（1.State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
2.Guilin Tebon New Material Corporation, Guilin 541004, China）
Abstract:A novel method for coating tungsten on diamond was put forward. In the method, using the volatilization of tungsten oxides in water vapor and chemical vapor transport, the tungsten coating on diamond was obtained by reducing the activator doped tungsten oxide powders in the atmosphere mixture of H2/H2O at 750−900 ℃. The morphology was observed by scanning electronic microscope and the phase composition was analysed by X-ray diffraction. The results show that the coverage area of tungsten film on diamond surface is above 90% and the steady tungstenic carbides WC and W2C are created by this technology. The tungsten film coated on diamond is realized.
Key words: diamond; tungsten; coating
