Abstract
Abstract In this study, a monolithic MoSi2 matrix reinforced with 20 vol% SiC particles, a SiC/MoSi2 composite matrix reinforced with 20 vol% ZrO2 particles, and a ZrO2/MoSi2 composite were fabricated using hot press sintering at 1350 for 1 h under a pressure of 30 MPa. The Vickers hardness and sliding wear resistance of the monolithic MoSi2, ZrO2/MoSi2, and SiC/MoSi2 composite were investigated at room temperature. A wear behavior test was carried out using a disk-type wear tester with a silicon nitride ball. The ZrO2/MoSi2 composite showed an aver-age Vickers hardness value and excellent wear resistance compared with the monolithic MoSi2 and SiC/MoSi2 composite at room temperature. Keywords: Friction coefficient, Monolithic MoSi2, Scanning Electron Microscopy, Sliding wear resistance 1. Introduction MoSi 2 , Mo 5 Si 3 , and other transition metal sili-cides have drawn considerable attention as struc-tural materials in oxidizing environments at ele-vated temperatures [1,2]. MoSi 2 is known to have excellent oxidation resistance, a high melting point (2020 ), moderate density, high thermal conductivity, and thermodynamic compatibility with other potential reinforcements [3,4]. MoSi
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