Effect of SiC and WC additon on Oxidation Behavior of Spark-Plasma-Sintered ZrB2
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
ZrB2 ceramic and ZrB2 ceramic composites with the addition of SiC, WC, and SiC/WC are successfully synthesized by a spark plasma sintering method. During high-temperature oxidation, SiC additive form a SiO2 amorphous outer scale layer and SiC-deplete ZrO2 scale layer, which decrease the oxidation rate. WC addition forms WO3 during the oxidation process to result in a ZrO2/WO3 liquid sintering layer, which is known to improve the antioxidation effect. The addition of SiC and WC to ZrB2 reduces the oxygen effective diffusivity by one-fifth of that of ZrB2. The addition of both SiC and WC shows the formation of a SiO2 outer dense glass layer and ZrO2/WO3 layer so that the anti-oxidation effect is improved three times as much as that of ZrB2. Therefore, SiC- and WC-added ZrB2 has a lower two-order oxygen effective diffusivity than ZrB2; it improves the anti-oxidation performance 3 times as much as that of ZrB2.
Abstract
ZrB2 ceramic and ZrB2 ceramic composites with the addition of SiC, WC, and SiC/WC are successfully synthesized by a spark plasma sintering method. During high-temperature oxidation, SiC additive form a SiO2 amorphous outer scale layer and SiC-deplete ZrO2 scale layer, which decrease the oxidation rate. WC addition forms WO3 during the oxidation process to result in a ZrO2/WO3 liquid sintering layer, which is known to improve the antioxidation effect. The addition of SiC and WC to ZrB2 reduces the oxygen effective diffusivity by one-fifth of that of ZrB2. The addition of both SiC and WC shows the formation of a SiO2 outer dense glass layer and ZrO2/WO3 layer so that the anti-oxidation effect is improved three times as much as that of ZrB2. Therefore, SiC- and WC-added ZrB2 has a lower two-order oxygen effective diffusivity than ZrB2; it improves the anti-oxidation performance 3 times as much as that of ZrB2.
참고문헌 (16)
- F. Monteverde, , J. Electrochem. Soc, 150, pp.B552~ (2003)
- W. C. Tripp, , J. Electrochem. Soc, 118, pp.1195~ (1971)
- A. Rezaie, , J. Eur. Ceram. Soc, 27, pp.2495~ (2007)
- G. -J. Zhang, , J. Am. Ceram. Soc, 83, pp.2330~ (2000)
- S. S. Hwang, , Mater. Sci. Eng. A, 464, pp.216~ (2007)
- J. Han, , Scr. Mater, 57, pp.825~ (2007)
- S. N. Karlsdottir, , J. Am. Ceram. Soc, 92, pp.481~ (2009)
- W. -M. Guo, , J. Eur. Ceram. Soc, 30, pp.2387~ (2010)
- W. G. Fahrenholtz, , J. Am. Ceram. Soc, 90, pp.143~ (2007)
- M. Mallik, , J. Eur. Ceram. Soc, 31, pp.199~ (2011)
- S. C. Zhang, , J. Am. Ceram. Soc, 91, pp.3530~ (2008)
- S. C. Zhang, , J. Am. Ceram. Soc, 94, pp.1198~ (2011)
- J. Zou, , J. Am. Ceram. Soc, 94, pp.1575~ (2011)
- J. Zou, , J. Am. Ceram. Soc, 95, pp.874~ (2012)
- T. A. Parthasarathy, , J. Am. Ceram. Soc, 92, pp.1079~ (2009)
- T. A. Parthasarathy, , Acta Mater, 55, pp.5999~ (2007)