Isothermal Oxidation Resistance of Zr3[Al(Si)]4C6-Based Composite Ceramics at 1000-1300°C in Air

Lei Yu; Hui Liu; Kai Liang; Zhen Di Zang; Jia Cheng Shi; Yi Ru Shen; Qi Tian; Xu Hong Wang

doi:10.4028/www.scientific.net/SSP.281.444

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Isothermal Oxidation Resistance of Zr₃[Al(Si)]₄C₆-Based Composite Ceramics at 1000-1300°C in Air

Abstract:

The isothermal oxidation behavior of Zr₃[Al(Si)]₄C₆-ZrB₂-ZrC composite ceramics at 1000-1300 °C in air has been investigated. The oxidation kinetics of the composites and generally follows a parabolic law. At the same oxidation temperature and time, the weight gain per unit surface area, oxidation rate constant and oxide thickness of the composites are higher than those of monolithic Zr₃[Al(Si)]₄C₆ ceramic. With the incorporation of ZrB₂ and ZrC, the oxidation resistance of the composites becomes poor. The surfaces of the oxide layer have a loose and porous structure, consisting of mainly ZrO₂ and little mullite, and there are no dense oxide films preventing the inward diffusion of oxygen element effectively.

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Periodical:

Solid State Phenomena (Volume 281)

Pages:

444-449

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.281.444

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Online since:

August 2018

Authors:

Lei Yu, Hui Liu, Kai Liang, Zhen Di Zang, Jia Cheng Shi, Yi Ru Shen, Qi Tian, Xu Hong Wang*

Keywords:

Oxidation Kinetics, Oxidation Mechanism, Zr₃[Al(Si)]₄C₆-ZrB₂-ZrC

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