(1. 中南大学 粉末冶金国家重点实验室，长沙 410083；
2. 桂林特邦新材料有限公司，桂林 541004)
摘 要: 研究在金刚石表面镀覆金属钨的新方法，即通过采用H2/H2O混合气体在750~900 ℃下还原含催化剂的钨的氧化物，利用钨的氧化物在水蒸气中的挥发特性及其化学气相传输，在金刚石表面镀覆金属钨。结果表明，该方法可在金刚石表面镀覆上一层覆盖面达到90%以上的金属钨膜，且生成稳定的碳化物WC和W2C，得到由难熔金属钨包覆的金刚石。
关键字: 金刚石；钨；镀覆
（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
