Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 23    No. 2    February 2013

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Solid-state bonding between Al and Cu by vacuum hot pressing
Kwang Seok LEE, Yong-Nam KWON

Materials Deformation Department, Korea Institute of Materials Science,
797 Changwondaero, Changwon, Gyeongnam 641-831, Korea

Abstract:Diffusion bonding between aluminum and copper was performed by vacuum hot pressing at temperatures between 623 and 923 K through two thermal processes: hot compression under the deformation rate of 0.2 mm/min for 10 min at pre-set temperatures, and additional pressing at 0.2 mm/min for 20 min during furnace cooling. After analyzing interface, the feasible diffusion bonding temperature was suggested as 823 K. The three major intermetallic layers generated during diffusion bonding process were identified as Al2Cu, AlCu+Al3Cu4 and Al4Cu9. Furthermore, local hardness values of Al2Cu, AlCu+Al3Cu4 and Al4Cu9 layers average at (4.97±0.05), (6.33±0.00) and (6.06±0.18) GPa, respectively.

 

Key words: vacuum hot pressing; diffusion bonding; Al-Cu intermetallic compound; composite interface; interface microstructures; nanoindentation

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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