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粉末擴散法金剛石表面金屬化

Surface Metallization of Diamond by Powder Diffusion

  • 摘要: 研究粉末擴散法使金剛石表面金屬化的工藝。采用銅(或鈷)、碳化物形成元素鉻(或鈦)和金剛石混合粉在真空下進行擴散熱處理,金剛石表面形成由碳化物層和合金層組成的涂層。涂層可以通過固相擴散反應和液相存在下的擴散反應兩種模式形成。銅基和鈷基胎體材料和涂層金剛石間具有良好的結合強度。同無涂層金剛石比較,含涂層金剛石胎體材料的抗彎強度提高9%~20%。

     

    Abstract: A method of surface metallization of diamond, temper powder diffusion heat treatment, was developed. A powder mixture of elemental Cu (or Co), carbide-forming element Ti (or Cr) and diamond was heat-treatmented under vacuum. Carbide and metal film were formed on the diamond surface through solid diffusion reaction or diffusion reaction in presence of liquid phase. The bonding strenth of matrix material and the diamond was improved by using coated diamond. The bending strenth of matrix material with coated diamond was 9%-12% higher than that of matrix material with uncoated diamond.

     

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