Active braze alloy
alloys used for brazing PCD cannot be used to braze single crystals of
diamond as they do not 'wet' diamond. A reactive or 'active' braze alloy
These alloys contain a small percentage of
titanium metal. When heated, the carrier alloy melts and bonds to the
tool substrate which should be molybdenum or cemented carbide.
titanium reacts with the diamond surface forming titanium carbide
(TiC). It is this reaction layer which gives the bond to the diamond.