Vol. 30, Issue 4, pp. 627-633

Abstract

Presents the results of investigation on the physicochemical properties of the lead-zinc-boron system intended for use as vitrified bonds for cubic boron nitride (cBN) tools in which the glass of a sodium-aluminium-borosilicon system is applied as a modified filler. For investigation purposes the following techniques were employed: DTA, XRD, and helium pycnometry, EDAX, scanning microscopy with EDS microanalysis and capillary condensation of nitrogen. The sinters tested have been found useful as vitrified bonds for cubic boron nitride tools. The addition of microporous glass in an amount of 1% by vol. has the most favourable effect on the mechanical parameters of sinters.