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OALib Journal期刊
ISSN: 2333-9721
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(zrb2+zrc)/zr3[al(si)]4c6复相陶瓷在1000～1300℃空气中的恒温氧化行为
DOI: 10.3969/j.issn.1671-7627.2014.05.001, PP. 1-6
Keywords: (zrb2+zrc)/zr3[al(si)]4c6,氧化动力学,氧化层,氧化机制
Abstract:
对原位热压烧结制备的(zrb2+zrc)/zr3[al(si)]4c6复相陶瓷在1000～1300℃空气中的恒温氧化行为进行研究。结果表明:随着氧化温度的升高和氧化时间的延长,复相陶瓷的氧化增量和氧化速率均逐渐增大,材料的氧化过程遵循抛物线规律。zrb2+zrc的引入降低了材料的抗氧化性能,复相陶瓷的氧化层表面主要由m-zro2、少量t-zro2和莫来石组成,疏松多孔,未能形成有效阻止氧扩散的致密氧化膜。在相同氧化温度和氧化时间下,(zrb2+zrc)/zr3[al(si)]4c6复相陶瓷的单位面积氧化增量、氧化速率以及氧化层厚度均大于单相zr3[al(si)]4c6陶瓷。
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