Abstract
Wear behaviors of MoSi 2 doped with La 2O 3 against SiC under different loads at 1000 °C in air were investigated by using an XP-5 type high temperature friction and wear tester. The worn surfaces and phases of the samples were analyzed by scanning electron microscopy (SEM) and X-ray diffraction, respectively. Results showed that the addition of La 2O 3 could obviously improve wear resistance of MoSi 2. Because of the formation of MoO 3 phase on the worn surface, La 2O 3/MoSi 2 composite mainly exhibited oxidation and abrasive wear, which was different from the wear form of MoSi 2 such as adhesion, oxidation and abrasion.
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