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The Effect of Fabrication Process Parameters on the Microstructures of Intermetallic/Metal Laminated Composite by Self-propagating High-temperature Synthesis  

김희연 (한국과학기술원 재료공학과)
정동석 (창원기능대학, 재료과)
홍순형 (한국과학기술원 재료공학과)
Publication Information
Composites Research / v.16, no.3, 2003 , pp. 68-74 More about this Journal
Abstract
In this paper, intermetallic/metal laminated composites have been successfully produced that utilizes SHS reactions between Ni and Al elemental metal foils. The reaction between Ni and Al started from the nucleation and growth of NiA1$_3$ and was followed by the diffusional growth of Ni$_2$A1$_3$ between Ni and NiA1$_3$. The SHS reaction was thermodynamically analyzed through the final volume fraction of the non-reacted Al related with the initial thickness ratio of Ni:Al and prior heat treatment. Thermally aging these 1aminates resulted in formation of a functionally gradient series of intermetallic phases. Microstructure showed that the intermetallic volume percent was 82, 59.5, 40% in the 1:1, 2:1, 4:1 thickness ratio specimen. Main phases of the intermetallic were NiAl and Ni$_3$Al having higher strength at room and high temperatures.
Keywords
Self-propagating High-temperature Synthesis; Laminated Composite; Intermetallic/metal; Ni-Al;
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