(1. 中南大學 應用物理與熱能工程系， 長沙 410083;
2. 中南大學 粉末冶金研究所，長沙 410083)
摘 要: 采用磁控濺射的方法在金剛石表面鍍覆Ti，Mo，Cu以及TiN。測定了鍍Ti金剛石的單粒抗壓強度，用XPS分析了真空熱處理后的金剛石表面結構，利用抗彎強度試驗及掃描電鏡分析，研究了鍍膜金剛石在Co基結合劑中的界面結合狀態(tài)。結果表明：金剛石鍍膜后能夠提高其單粒抗壓強度。在840 ℃的熱壓條件下，鍍層金屬與金剛石能夠在局部生成碳化物而形成化學結合，但對結合強度的提高還沒有起著主導作用。鍍Mo金剛石能夠被Co基結合劑很好地浸潤，因而結合強度有較大的提高。
關鍵字: 磁控濺射; 鍍膜; 金剛石; 結合強度
between diamond and matrix
（1. Department of Applied Physics and Heat Engineering,
Central South University,Changsha 410083, P.R.China;
2. Institute of Powder Metallurgy,
Central South University, Changsha 410083, P.R.China）
Abstract:Ti, Mo, Cu and TiN were coated on diamond by the technology of magnetron sputtering. The compression strength of the diamond was measured. After diamond was taken heat treatment under vacuum condition, the surface structure of diamond was analyzed by XPS. The bonding states between cobalt-matrix and coated diamond havebeen studied using transverse rupture strength (TRS) testing, SEM and EDAX. Thecompression strength of the diamond could be increased by coatings. Only part of coated metal and diamond could be compound carbide and come into chemical bonding under hot-pressing condition of 830～840 ℃, which, however, have not greater effect to improve the binding strength. Mo-coated diamond could be rather impregnated by cobalt-matrix, and the binding strength between them has a greater increase.
Key words: magnetron sputtering； coatings; diamond; binding strength
