کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1473502 | 991046 | 2016 | 6 صفحه PDF | دانلود رایگان |
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.
Journal: Journal of the European Ceramic Society - Volume 36, Issue 15, November 2016, Pages 3769–3774