Pulse electric current sintering of 3D interpenetrating SiC/Al composites

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• 作者：Bo Wang^a ; ; Shan Zhao^a ; Fumihiko Ojima^b ; Jian-Feng Yang^a ; Kozo Ishizaki^b
• 关键词：Silicon carbide ; Composite ; Pulse electric current sintering ; Infiltration ; Young's modulus
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：1 February 2017
• 年：2017
• 卷：43
• 期：2
• 页码：2867-2870
• 全文大小：1082 K
• 卷排序：43

文摘

A novel technique is proposed for fabricating 3D interpenetrating SiC/Al composites by pressure infiltration of molten aluminum into porous SiC ceramic utilizing a pulse electric current sintering method. The porous SiC ceramics was prepared by low temperature sintering at 850 °C using glass bonding materials. Then, the porous SiC ceramic preform “sandwiched” between two aluminum discs was sintered at 660 °C for 2 min. The microstructures, Young's modulus, and internal frication of the composites were investigated. Up to more than 98% of all open pores were infiltrated with molten metal even after a very short processing time. Aluminum was homogeneously dispersed throughout the SiC ceramic, and the SiC/Al interface was well bonded without any obvious reaction.