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Joining of silicon carbide ceramic for optical application by reaction bonded technology
Aifang Zhang; Yichao Chen; Zhiqiang Chen; Hong Liu; Jingzhong Fang
Volume7654
Pages765410 (5 pp.)
2010
Language英语
Indexed ByEi ; ISTP
Subtype会议论文
AbstractSilicon carbide ceramic is a prospective candidate for the next generation space telescope with a large-scale reflector. In order to reduce the cost of the fabrication of complex shaped component, the joining technology of SiC ceramic is investigated. In this work, SiC ceramic was joined by reaction bonded technology using SiC green preforms successfully. SiC green preforms were fastened together by epoxy resin and joined during the process of one-step Si infiltration. The microstructure and composition of SiC substrate ceramic and the joint is homogeneous and there have no micro-cracks or defects in the joint. The interface reaction layer become smaller and even disappears with carefully surface grinding of the SiC green preforms. The surface roughness of the joined SiC in the area of the joint is 0.95nm rms and there has no significant difference in the surface roughness of the joint area and SiC substrate ceramic. The bending strength of the joined SiC is about 300MPa and the crack occurred inside the SiC substrate but not in the joint. The most important advantage of the method is the joining of SiC ceramics was achieved via one-step Si infiltration process and the joints are homogeneous with the substrate, which is economical and effective. The mechanical and optical properties of the joined SiC can satisfy the requirement of the large-scale telescope in many astronomical instruments.; Silicon carbide ceramic is a prospective candidate for the next generation space telescope with a large-scale reflector. In order to reduce the cost of the fabrication of complex shaped component, the joining technology of SiC ceramic is investigated. In this work, SiC ceramic was joined by reaction bonded technology using SiC green preforms successfully. SiC green preforms were fastened together by epoxy resin and joined during the process of one-step Si infiltration. The microstructure and composition of SiC substrate ceramic and the joint is homogeneous and there have no micro-cracks or defects in the joint. The interface reaction layer become smaller and even disappears with carefully surface grinding of the SiC green preforms. The surface roughness of the joined SiC in the area of the joint is 0.95nm rms and there has no significant difference in the surface roughness of the joint area and SiC substrate ceramic. The bending strength of the joined SiC is about 300MPa and the crack occurred inside the SiC substrate but not in the joint. The most important advantage of the method is the joining of SiC ceramics was achieved via one-step Si infiltration process and the joints are homogeneous with the substrate, which is economical and effective. The mechanical and optical properties of the joined SiC can satisfy the requirement of the large-scale telescope in many astronomical instruments.
Conference NameProceedings of the SPIE - The International Society for Optical Engineering
Conference Date2010
Document Type会议论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/7904
Collection轻量化中心
Corresponding AuthorAifang Zhang
Affiliation中国科学院光电技术研究所
Recommended Citation
GB/T 7714
Aifang Zhang,Yichao Chen,Zhiqiang Chen,et al. Joining of silicon carbide ceramic for optical application by reaction bonded technology[C],2010:765410 (5 pp.).
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