The effect of nickel sulfide on the process of spontaneous damage of hardened glass

Studies have shown that the "heat-soak" method used for rejection of tempered glasses does not fully guarantee that during the operation of these glasses, their self-destruction from the presence of NiS inclusions of smaller sizes is completely excluded. We believe that the cause of glass self-destruction is not so much NiS polymorphism as high stresses around NiS inclusions, and, as a consequence, limitation of the glass "life" time in accordance with the kinetic theory of long-term strength. Tab. 1, ill. eight.