Study on interface between titanium
coated-diamond and metalmatrices
coated-diamond and metalmatrices
(1. Department of Materials Science and Engineering,
Central South University, Changsha 410083, P.R.China;
2. Changsha Research Institute of Mining and Metallurgy,
Changsha 410012, P.R.China)
Central South University, Changsha 410083, P.R.China;
2. Changsha Research Institute of Mining and Metallurgy,
Changsha 410012, P.R.China)
Abstract: The XRD spectrum of titanium-coated diamond showed the existence of titanium carbide on the interface between diamond and its titanium coating. The diffusions between titanium coating and metal matrices were studied by SEM. The SEM photographs revealed that titanium can interdiffuse with nickel, cobalt, copper,iron and copper-based alloy to a great extent to lead to the disappearance of pure titanium layer and the formation of titanium diffusion layer. The results from transverse-rupture strength test showed that titanium coating on diamond improved the bonding strength between diamond and metal matrices by 3.2% for Co-based segment and 4.1% for Cu-10Sn based segment respectively.
Key words: interdiffusion; transverserupture strength; titaniumcoated diamond