Preparation of SiC Ceramics from Charcoal
Preparation of SiC Ceramics from Charcoal
复制标题
木炭制备碳化硅陶瓷
DOI：
10.2472/jsms.52.576
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
T. Nishida
中科院分区：
文献类型：
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作者：
Y. Matsumura;Ikuko Kamada;T. Shiono;T. Nishida
木炭因其可再生、有利于解决地球资源流失和环境问题而被公认为新型碳资源。在SiC陶瓷的生产中，本研究采用木炭作为碳源。为了验证炭粉的实用性，用炭、炭黑和石墨三种碳进行了碳化硅生成反应，并对其与硅的反应性进行了研究。炭制碳化硅结晶度好。炭粉由于其特有的多孔结构，与硅表现出较好的反应性。人们发现木炭是陶瓷生产的碳源。利用炭的特性结构，采用硅渗透法制备多孔碳化硅。在1450℃下，氩气流下浸透2h。所得试样几乎与SiC反应，但XRD检测到少量硅。而与Si反应后，炭的特征结构保持不变。与活性炭相比，多孔碳化硅材料的力学性能得到了改善。
Charcoal has been recognized as new carbon resource because it is reproducible and good for earth resource drain and environmental problems. For production of SiC ceramics, in the present study, charcoal was utilized as a carbon source. In order to examine the usefulness of charcoal powder, three kinds of carbon, charcoal, carbon black and graphite were used for the reaction of SiC formation and the reactivity with silicon was investigated. SiC from charcoal had good crystallinity. Charcoal powder showed better reactivity with silicon due to the characteristic porous structure. Charcoal was found to become carbon source for ceramics production. Porous SiC was prepared utilizing the characteristic structure of charcoal by Si-infiltration technique. The infiltration was carried out at 1450°C for 2h under a flow of Ar gas. Obtained specimen was almost reacted to SiC but a little bit of silicon was observed via XRD. However, the characteristic structure of charcoal was maintained after the reaction with Si. The mechanical properties of the porous SiC materials were improved compared with as-received charcoal.