Study on interface between titanium-coated diamond and metal matrices

The XRD spectrum of titanium coated diamond showed the existence of titanium ca rbide on the interface between diamond and its titanium coating. The diffusions between titanium coating and metal matrices were stud ied by SEM. The SEM photographs revealed that titanium can interdiffuse with nic kel, cobalt, copper,iron and copper based alloy to a great extent to lead to th e disappearance of pure titanium layer and the formation of titanium diffusion l ayer. The results from transverse rupture strength test showed that ti tanium 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.