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The effect of ZrO2 addition on the mechanical properties of B4C ceramics prepared by pressureless sintering was investigated. Submicron B4C powders, phenolic resin as binders and submicro-sized ZrO2 as sintering aids were used. Results show that the addition of ZrO2 improves the relative density and mechanical properties of B4C remarkably. The highest relative density was 96.7%, meanwhile bending...
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