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Low‐Temperature Hot Pressing of ZrB

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Densification of zirconium diborides (ZrB2) was examined by hot pressing at different temperatures ranging from 1350°C to 1500°C with sintering additives of zirconium disilicide (ZrSi2), ranging from 10 vol% to 40 vol%. The effect of the amount of ZrSi2 additives on the densification of ZrB2 was assessed. The sinterability of ZrB2 with ZrSi2 additives was significantly improved, and this improvement was enhanced with the increasing ZrSi2 added. The relative density exceeding 94% was obtained for the studied ZrB2 ceramics with ZrSi2 additives at a temperature equal to or above 1450°C, depending on the amount of additive. With 10 vol% ZrSi2 additions, the relative density increased from 79.3% at 1350°C to 96.5% at 1500°C. With additions equal to or above 20 vol% ZrSi2, a relative density exceeding 96% was obtained at 1450°C, and the nearly fully dense ZrB2 compacts were obtained at 1500°C.
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Document Type: Research Article

Affiliations: 1: Hybrid Materials Center, National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan 2: Nano Ceramic Center, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan

Publication date: 2011-11-01

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