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Vol.27, No.6, 529 ~ 537, 1989
Title
A Study on the Sintering Phenomena of Al - cu Powder Compact
이광민Kwang Min Lee, 문인형In Hyung Moon, 이도재Doh Jae Lee
Abstract
The effects of sintering temperature, sintering atmosphere and sintering time on dimensional changes, microstructures and mechanical properties of Al-4.3wt.% Cu powder compacts have been investigated. The compact sintered at 560℃ shows a considerable expansion, while the swelling is followed by a rapid contraction at higher temperature. Dimensional changes are also affected by sintering atmosphere, with sintering in H₂atomsphere resulting in greater expansion. The compacts sintered at above 600℃ have been homogenized within 10 minutes and the prolonged sintering time have promoted the grain growth of sintered compact. The optimum mechanical properties are obtained by sintering at 600℃ for 30 minutes in N₂atmosphere. The model experiment used spherical coarse Cu powder haute been performed to observe the formation and behaviour of the liquid phase during sintering of Al-Cu powder compacts.
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