Oxidation Behaviour Of Zrb2–Sic (Al/Y) Ceramics At 1700 °C

Keywords

Doped; Oxidation; Oxidation kinetics; Oxidation resistance; ZrB –SiC 2

Abstract

ZrB2–SiC(Al/Y) ceramic composites were prepared by hot-pressing a mixture of ZrB2 and polymer-derived SiC doped with either aluminium or yttrium (SiC(Al/Y)). The obtained composites were oxidized at 1700 °C in air. The weight change as a function of the oxidation time was measured to study the oxidation kinetics. It was found that the ZrB2–SiC(Al/Y) composites exhibited significantly improved oxidation resistance, as compared to the composite of ZrB2 with un-doped SiC. The structure of the oxide resulted from the oxidation of the composites was characterized by scanning electron microscopy and X-ray diffraction. The results suggested that the improvement can be attributed to the formation of yttrium/aluminium-doped silica and/or yttrium disilicate, which effectively protect the composites.

Publication Date

11-1-2016

Publication Title

Journal of the European Ceramic Society

Volume

36

Issue

15

Number of Pages

3769-3774

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.jeurceramsoc.2016.02.037

Socpus ID

84959222215 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84959222215

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