CONTACT INTERACTIONS AND WETTABILITY OF CUBIC BORON-NITRIDE POLYCRYSTAL WITH GOLD-ALLOYS CONTAINING TRANSITION-METAL ADDITIVES

The wettability of cubic boron nitride with gold alloys containing van adium, tantalum, niobium, and titanium additives as well as contact in teractions between cBN and alloy were studied. Experiments were carrie d out in vacuum of 1E-03 Pa in the temperature range of 1100-1400 degr ees C. For the systems studied, the adhesion work of cBN towards the a lloys was calculated. From the results it can be concluded that the we ttability and adhesion in the system cBN-alloy increase as the tempera ture and concentration of the active component in the alloy grow. The order of the increase of the Theta angle Value for the alloy additions studied is as follows: V-Ti-Nb-Ta. (C) 1997 Elsevier Science Limited and Techna S.r.l.