The impact of a sintering additive from Al, Mg, Y-oligomer on the physicochemical properties of MoSi2 ceramic

Abstract

Abstract We investigated the effect of a triple oxide additive (Al2O3-MgO-Y2O3) obtained by a new method on ceramics properties based on MoSi2. The ternary oxide was obtained from a ceramic-forming oligomer. Ceramic MoSi2 samples were obtained by hot pressing of molybdenum disilicide with ternary oxide 1, 3, 5, 10 wt% at 1650 °C and 30 MPa. The graphs of the dependence of density, bending strength and electrical resistance on the content of Al2O3-MgO-Y2O3 are presented. It was found that as the additive level was increased, the flexural strength increased to 89 MPa. The specific electrical resistance, depending on the oxide additive content, is extreme with a maximum for a composition containing 1 wt% Al2O3-MgO-Y2O3.