SiC-AlON陶瓷复合材料的高温抗氧化性能

IF 0.9 4区 材料科学 Q3 MATERIALS SCIENCE, CERAMICS
Lai Xiao, Yu-de Xiao, Xiao-long Zhao, Xing Li, Lv Chen, T. Xuan, Ya Zhang, Z. Cai, Xiao Wang
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引用次数: 1

摘要

在700 ~ 1500℃温度下,研究了纯AlON陶瓷和8wt % SiC-AlON复合材料的微观结构和氧化行为。随着氧化温度的升高,两种陶瓷的表面形貌呈现出由针状到片状再到粒状的变化。在1100℃以上,纳米SiC颗粒的加入显著提高了陶瓷的抗氧化性能。这是由于形成了由Al2O3、SiO2和莫来石组成的致密氧化层,覆盖了整个基体,抑制了氧的进一步渗透。由于氧化层致密,8wt .% SiC-AlON复合材料的氧化动力学服从抛物线规律,而纯AlON的氧化动力学服从线性规律。在1500℃氧化40 h后,8 wt.%的SiC-AlON复合材料增重3.07mg/cm2,仅为纯AlON的22.5%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Oxidation resistance performance of SiC-AlON ceramic composites at high temperature
The microstructure and oxidation behaviour of the pure AlON ceramics and 8 wt.% SiC-AlON composite were investigated at 700-1500?C. With increasing oxidation temperature, the surface morphology of two ceramics showed a change from acicular to flaky-like and then to granular features. With the addition of nanosized SiC particles, the oxidation resistance of the ceramics was remarkably enhanced above 1100?C. This is attributed to the formation of a dense oxide layer composed of Al2O3, SiO2 and mullite, which could cover the whole matrix and suppress further penetration of oxygen. Due to the dense oxide layer, the oxidation kinetics of the 8 wt.% SiC-AlON composites conformed to a parabolic law, while that of the pure AlON conformed to a linear law. After oxidation at 1500 ?C for 40 h, the weight gain of the 8 wt.% SiC-AlON composites was 3.07mg/cm2, which was only 22.5% of that of the pure AlON.
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来源期刊
Processing and Application of Ceramics
Processing and Application of Ceramics MATERIALS SCIENCE, CERAMICS-
CiteScore
1.90
自引率
9.10%
发文量
14
审稿时长
10 weeks
期刊介绍: Information not localized
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