Abstract
B₄C ceramics were fabricated by a hot-press sintering method and their sintering behavior, microstructure and mechanical properties were evaluated. Relative density of B₄C ceramics were obtained by a hot-press sintering method reached as high as 99% without any sintering additives. The mechanical properties of B₄C ceramics was improved by a methanol washing process which can remove B₂O₃ phase from a B₄C powder surface. This improvement results from the formation of homogeneous microstructure because the grain coarsening was suppressed by the elimination of B₂O₃ phase. Particularly, mechanical properties of the sintered specimen using a methanol washed powder improved compared with the specimen using an as-received commercial powder.
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