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The corrosion behaviour in closed system of a pressureless sintered ZrB 2 –20vol% MoSi 2 composite was studied in 1.8M H 2 SO 4 solution at RT, 40 and 70°C up to 90h. The corrosion resistance is quite poor because of the easy leaching of ZrB 2 phase. MoSi 2 phase and secondary phases such as ZrO 2 and Mo 5 Si 3 are less affected...
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