SATURATION OF GLASS PARTICLES WITH METAL DURING SINTERING OF A COMPOSITE MATERIAL OF THE IRON–CAST IRON–GLASS SYSTEM
Abstract
Sintering of multicomponent systems is characterized by a number of features, consisting in the fact that sintering of dissimilar materials is a complex eutectic process. Along with self-diffusion, which causes the transfer of mass to the contact area of the particles, there is mutual diffusion, which ensures the homogenization of the composition by equalizing the concentrations of unlike atoms within the sample. Under conditions of limited solubility or complete insolubility of the components, sintering of the system is complicated by the isolation of homogeneous particles from mutual contact, hindering self-diffusion and thereby worsening the sintering conditions.
The saturation of particles of vacuum glass brand S88–5 (GOST 11.027.010–75, Russia) and glass “Pyrex” (TS, Russia), which are part of iron and “iron-cast iron glass” materials, depending on the sintering temperature, has been studied.
To improve the interfacial interaction, and, consequently, to increase the mechanical and tribotechnical properties of powdered iron-glass materials, the effect of the glass melting temperature on the saturation of glass with metal was investigated. The dependences of the content of base metal and silicon ions in glass on the sintering temperature are plotted. The effect of the glass melting temperature on increasing the saturation of glass with metal is predicted.
The saturation of the glass with the base metal depends on the viscosity of the glass at sintering temperatures and is accompanied by an increase in microhardness and refractive indices up to 1.2 times compared to the initial state of the glass.
The microhardness of particles of vacuum glass of grade S88-5 after sintering of metal-glass samples increases noticeably than in samples with Pyrex glass.
When sintering "iron-cast iron-glass" materials, the metal base is saturated with silicon, which leads to an increase in the hardness of iron up to 1.8 times
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