Oxidation resistance of carbon-ceramics composite materials sintered from ground powder mixtures of raw coke and ceramics
Oxidation resistance of carbon-ceramics composite materials sintered from ground powder mixtures of raw coke and ceramics
复制标题
原焦与陶瓷磨粉混合物烧结碳陶瓷复合材料的抗氧化性能
DOI：
10.1007/bf01154601
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发表时间：
1988
影响因子：
4.5
通讯作者：
Susumu Nishikawa
中科院分区：
文献类型：
--
作者：
I. Ogawa;Kazuo Kobayashi;Susumu Nishikawa
以石油生焦、碳化硅和碳化硅为原料，不使用任何特殊的粘结剂和热压工艺，采用粉末烧结法制备了碳-碳化硅-碳化硼复合材料。获得了致密的复合材料，具有良好的微观结构。在1000~1300°C的空气条件下，对复合材料进行了氧化试验。复合材料的抗氧化性强烈依赖于复合材料中的碳化硅/(碳化硅+碳化硅)比和碳化硅和碳化硅的总含量，这决定了氧化过程中在复合块体表面形成的保护膜中B2O3和二氧化硅的组成。在最佳配比下，从63%到87%，复合材料表现出如此高的抗氧化性，在1200℃时可以与Si3N4相媲美。
Carbon-SiC-B4C composite materials were prepared from ground powder mixtures of petroleum raw coke, SiC and B4C by powder sintering, without the use of any special binder and hot-pressing process. Dense composites with a fine microtexture were obtained. Oxidation tests were carried out on the composites at temperatures from 1000 to 1300° C under an air flow. The oxidation resistance depended strongly on the SiC/(SiC + B4C) ratio and total contents of SiC and B4C in the composites, which determined the compositions of B2O3and SiO2in the protective film formed at the surface of the composite block during oxidation. In optimum ratios, from 63 to 87%, the composites showed such a high oxidation resistance that they were comparable with Si3N4at 1200° C.