Diamond coated body and method of its production
AssigneeSanvik AB
InventorsIngrid Reineck, Maria Nordin
Life of this patent
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Abstract
There is now provided a body coated with at least one diamond layer on a substrate of cemented carbide or cermets. The substrate is before the diamond coating process provided with spotwise occurring particles containing an element either being any of W, Ta, Ti, Mo Cr, V, Nb, Mg, Ca, Na, K or, preferably, any of B, Si, S, Al or P. These particles are dispersed at a density giving an average distance between two particles of 20 .mu.m or less, preferably 5 .mu.m or less.
Claims8
A method for producing a diamond layered body comprising treating the body to obtain a suitable surface region depleted of cobalt, treating the bodies in an ultrasonic bath containing particles containing at least one element taken from the group consisting of W, Ta, Ti, Mo, Cr, V, Nb, Al, Mg, Ca, Na, K, B, Si, S, P and mixtures thereof in a concentration of 2-50 g/l for about 30-60 minutes to produce a body having particles of an average size of either less than 5 .mu.m, or between 7-20 .mu.m on the surface and then coating said bodies with diamond by plasma-CVD technique.
Dependencies are inferred from the claim text.