Oxidation of ZrC–30 vol% SiC composite in air from low to ultrahigh temperature
Oxidation of ZrC–30 vol% SiC composite in air from low to ultrahigh temperature
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DOI：
10.1016/j.jeurceramsoc.2011.10.024
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发表时间：
2012-04
影响因子：
5.7
通讯作者：
L. C. Zhao;D. Jia;X. Duan;Zhihua Yang;Yu Zhou
中科院分区：
文献类型：
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作者：
L. C. Zhao;D. Jia;X. Duan;Zhihua Yang;Yu Zhou
ZrC-30vol氧化。用电炉和氧乙炔炬在空气中研究了% SiC。通过SEM、XRD和拉曼光谱分析了氧化皮的微观结构和物相组成。在800°和1100°C时，SiC被嵌入到多孔和裂纹的zro2鳞片中，这些鳞片具有单层结构，几乎没有保护作用。在1300和1500℃时，氧化皮的保护作用被形成的SiO2增强。在1300°C氧化≥1h， 1500°C氧化≥15min时，鳞片由外层和内层两个子鳞片组成。分析了两层的生长动力学。在~ 1700°C，在外层和内层之间观察到一个新的层，它应该比内层含有更少的碳。在~ 2100℃时，氧化膜是多孔的，含有许多大孔。该比例尺为单层结构，主要由ZrO2组成。
Oxidation of ZrC–30vol.% SiC is investigated in air using furnace and oxyacetylene torch. The microstructure and phase composition of oxide scales are analyzed via SEM, XRD, and Raman. At 800 and 1100°C, SiC is embedded in the porous and cracked ZrO2scales, which have a single-layer structure and are almost non-protective. At 1300 and 1500°C, the protective effect of oxide scales is enhanced by the formed SiO2. The scales consist of two subscales, outer and inner layers, during oxidation at 1300°C for ≥1h, and 1500°C for ≥15min. The growth kinetics of both layers is analyzed. At ∼1700°C, a new layer is observed between the outer and inner layers, which should contain less carbon than the inner layer. At ∼2100°C, the oxide scale is porous and contains many big holes. This scale shows a single-layer structure, which mainly consists of ZrO2.