Preparation and Characterization of the Coated ZrB2 @ ZrO2 Ceramic |
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| Journal | Advanced Materials Research (Volume 66) |
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| Volume | Advanced Synthesis and Processing Technology for Materials |
| Edited by | Takashi Goto, Yibing Cheng, Zhengyi Fu and Lianmeng Zhang |
| Pages | 226-229 |
| DOI | 10.4028/www.scientific.net/AMR.66.226 |
| Citation | Jian Rong Song et al., 2009, Advanced Materials Research, 66, 226 |
| Online since | April, 2009 |
| Authors | Jian Rong Song, Qiang Shen, Jun Guo Li, Lian Meng Zhang |
| Keywords | Coating, PECS, ZrB2, Zro2 |
| Abstract | In this work, ZrB2 powder coated with ZrO2 (ZrB2 @ ZrO2) were applied to promote the densification of ZrB2 prepared by pulsed electric current sintering (PECS). The coating process and sintering behavior were investigated. While the pH value was about 9, the ZrB2 particles were successfully coated with ZrO2 by co-precipitation methods. The thickness of ZrO2 layer was about 3-5nm. The coated powder was sintered at 1600C ~1950C by PECS in vacuum. For comparison, the pure ZrB2 powder was sintered at the same conditions. The relative density of the sample coated with ZrO2 was 97.8% at PECS 1950C, which was higher than that of sample without coating. The densification process can be divided into three stages. The ZrO2 coating layer plays an important role on the densification of ZrB2. |
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