Microstructure of SiC-Si-Al2O3 composites derived from silicone resin - metal aluminum filler compounds by low temperature reduction process
Microstructure of SiC-Si-Al2O3 composites derived from silicone resin - metal aluminum filler compounds by low temperature reduction process
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DOI：
10.1088/1757-899x/18/4/042003
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发表时间：
2011-06
期刊：
影响因子：
--
通讯作者：
M. Narisawa;Y. Abe
中科院分区：
文献类型：
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作者：
M. Narisawa;Y. Abe
制备了一种低碳含量的有机硅树脂、3 μm铝粉和乙醇的浓浆料。经浇铸、交联、干燥后，得到厚片状的硅树脂铝复合材料。将制备的片材在933或1073 K下以各种保持时间进行热处理，以表征热处理期间形成的相。XRD和FT-IR分析表明，在933 K时，样品中有游离Si生成，并存在Si-O-Si键。而在1073 K时，Si-O-Si键消失，形成碳化硅。SEM观察表明，在933 K时形成了由许多微小支柱桥接的裂纹，并在1073 K时转化为完全多孔结构。
Concentrated slurry of a silicone resin with low carbon content, 3 μm aluminum particles and ethanol were prepared. After casting, addition of cross-linking agent and drying, silicone resin-aluminum composite with thick sheet form was obtained. The prepared sheet was heat-treated at 933 or 1073K with various holding times to characterize formed phases during the heat treatments. XRD patterns and FT-IR spectra revealed free Si formation and existence of Si-O-Si bond at 933K. The Si-O-Si bond, however, disappeared and silicon carbide was formed at 1073K. SEM observation indicated formation of cracks bridged with a number of tiny struts at 933K and conversion to wholly porous structure at 1073K.