발간논문

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Vol.30, No.10, 1205 ~ 1211, 1992
Title
Swelling Behaviour of Cu - coated Fe Powder Compacts in Fe - Cu System
양현삼Hyun Sam Yang, 이경구Kyung Ku Lee, 문길원Kil Won Moon, 이도재Doh Jae Lee
Abstract
The swelling and alloying behaviour of ferrous metal powder compacts have been studied using TMA(thermomechanical analysis) and optical microscope. Binary Fe-Cu compacts containing 3wt% Cu and up to 7wt% Cu were prepared from blends of Fe and Cu powders, and Cu coated Fe powders respectively. The TMA observations indicated that penetration of Cu-liquid phase into Fe particle and grain boundary leads to swelling of the powder compacts during heating and early stage of isothermal sintering at 1150˚C. Those swelling can be suppressed by using Cu coated Fe powder. The alloying process was accompanied by grain boundary penetration of Cu-rich liquid phase.
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