NiAl(Si)/Al₂O₃ co-continuous composites by double reactive metal penetration into silica preforms

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• 作者：Diego Manfredi ; Matteo Pavese ; Sara Biamino ; Paolo Fino ; Claudio Badini
• 关键词：A. Composites ; A. Nickel aluminides ; based on NiAl ; B. Mechanical properties at ambient temperature ; C. Near-net-shape manufacturing ; G. Wear-resistant applications
• 刊名：Intermetallics
• 出版年：2008
• 出版时间：April 2008
• 年：2008
• 卷：16
• 期：4
• 页码：580-583
• 全文大小：957 K

文摘

NiAl(Si)/Al₂O₃ composites with co-continuous structure were prepared by a double reactive metal penetration technique. Silica preforms were in a first step immersed in an Al bath, obtaining an Al(Si)/Al₂O₃ composite, then a reactive penetration of Ni was performed, bringing to the substitution of Al with NiAl. The obtained composites present both phases continuous, and the whole process is a near-net-shape one. Various tests were performed, showing that the composites present high hardness and melting point and good modulus.