Process to produce void free refractory boride product

Claim 1

A PROCESS FOR PRODUCING A PORE-FREE PRODUCT WHICH COMPRISES: FORMING AN INTIMATE MIXTURE CONSISTING ESSENTIALLY OF NICKEL, SILVER AND A REFRACTORY MATERIAL WHICH IS NOT WET BY SILVER AND WHICH IS SELECTED FROM THE GROUP CONSISTING OF BORIDES OF THE METALS W, MO, CR, V AND TI, COMPACTING THE MIXTURE OF REFRACTORY MATERIAL AND METALS TO FORM A COMPACT HAVING A DENSITY SOMEWHAT LESS THAN THE THEORETICAL DENSITY OF SAID MIXTURE, MAINTAINING THE COMPACT IN PHYSICAL CONTACT WITH ADDITIONAL SILVER AND SIMULTANEOUSLY THEREWITH HEATING THE ADDITIONAL SILVER AND COMPACTED MATERIAL TO A TEMPERATURE AND FOR AN INTERVAL AT LEAST SUFFICIENT FOR THE ADDITIONAL SILVER TO MELT AND TO IMPREGNATE THE COMPACT TO SUBSTANTIALLY THEORETICAL DENSITY, THE RELATIVE AMOUNTS OF SILVER BEING SUCH THAT AT LEAST 15% OF THE TOTAL SILVER IS PRESENT IN THE ORIDGINAL MIXTURE AND THE REMAINDER OF THE SILVER BEING AT LEAST SUFFICIENT TO COMPLETELY FILL THE VOIDS IN SAID COMPACT.