Toughening mechanism of lined Al2O3-ZrO2 multiphaseceramics in SHS composite pipes

Guibo Yu; Wen Yan; Shuhai Wang; Baoxin Su; Baolai Tan

doi:10.1016/S1005-8850(06)60039-X

Volume 13 Issue 2

Apr. 2006

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文章导航 > 矿物冶金与材料学报（英文） > 2006 > 13(2): 178-182

Guibo Yu, Wen Yan, Shuhai Wang, Baoxin Su, and Baolai Tan, Toughening mechanism of lined Al₂O₃-ZrO₂ multiphaseceramics in SHS composite pipes, J. Univ. Sci. Technol. Beijing, 13(2006), No. 2, pp. 178-182. https://doi.org/10.1016/S1005-8850(06)60039-X

Cite this article as:

Guibo Yu, Wen Yan, Shuhai Wang, Baoxin Su, and Baolai Tan, Toughening mechanism of lined Al2O3-ZrO2 multiphaseceramics in SHS composite pipes, J. Univ. Sci. Technol. Beijing, 13(2006), No. 2, pp. 178-182. https://doi.org/10.1016/S1005-8850(06)60039-X

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Materials

Toughening mechanism of lined Al₂O₃-ZrO₂ multiphaseceramics in SHS composite pipes

Mechanical Engineering College of Shijiazhuang, Shijiazhuang 050003, China

通讯作者:
Guibo Yu E-mail: oec_ygb@yahoo.com.cn

中文摘要

Hypoeutectic and hypereutectic Al₂O₃-ZrO₂ multiphase ceramics-lined composite pipes were produced by using the gravitational separation self-propagate high-temperature synthesis (SHS) process. The microstructure of the ceramics was observed by means of SEM and EPMA. The fracture toughness of the multiphase ceramics was tested by using the Vickers indentation method. The fracture toughness of hypoeutectic Al₂O₃-ZrO₂ multiphase ceramics is 15.96 MPa·m^1/2 and that of hypoeutectic Al₂O₃-ZrO₂ multiphase ceramics is 15.23 MPa·m^1/2. The toughening mechanisms were systematically investigated by means of SEM and XRD. The results show that the bridging toughening mechanism, stress induced ZrO₂ transformation toughening mechanism, and microcrack toughening mechanism are the predominant toughening mechanism.

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Materials

Toughening mechanism of lined Al₂O₃-ZrO₂ multiphaseceramics in SHS composite pipes

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Abstract

Abstract

Hypoeutectic and hypereutectic Al₂O₃-ZrO₂ multiphase ceramics-lined composite pipes were produced by using the gravitational separation self-propagate high-temperature synthesis (SHS) process. The microstructure of the ceramics was observed by means of SEM and EPMA. The fracture toughness of the multiphase ceramics was tested by using the Vickers indentation method. The fracture toughness of hypoeutectic Al₂O₃-ZrO₂ multiphase ceramics is 15.96 MPa·m^1/2 and that of hypoeutectic Al₂O₃-ZrO₂ multiphase ceramics is 15.23 MPa·m^1/2. The toughening mechanisms were systematically investigated by means of SEM and XRD. The results show that the bridging toughening mechanism, stress induced ZrO₂ transformation toughening mechanism, and microcrack toughening mechanism are the predominant toughening mechanism.
- SHS;
- multiphase ceramics;
- eutectic structure;
- toughening mechanism