NDLI: Evaluation of intermediate phases formed on the bonding interface of hot pressed Cu/Al clad materials

Content Provider	Springer Nature Link
Author	Lee, Kwang Seok Lee, Sangmok Lee, Jong Sup Kim, Yong Bae Lee, Geun An Lee, Sang Pill Bae, Dong Su
Copyright Year	2016
Abstract	The aim of the present study is to identify the properties of intermediate phases formed on the bonding interface of hot pressed Cu/Al clad materials by transmission electron microscopy and nano-indentation analyses. Cu/Al clad materials were fabricated by hot pressing under 200 MPa at 250 °C for 1 h and then heat treated at 400 °C for 1 h. Nano-indentation measurement was conducted to evaluate the nanohardness and modulus of the intermediate phases formed between the Cu/Al interfaces. A 3-tier diffusion layer was observed at the Cu/Al interfaces. Knoop microhardness values at the bonding interface were 7 to 11 times that of the Cu and Al matrix metals. The intermediate phases formed at the bonding interface were Al4Cu9, AlCu, and Al$_{2}$Cu. A mapping analysis confirmed that the Al and Cu particles moved via mutual diffusion toward the intermediate phases formed at the bonding interface. The nanohardness values of η$_{2}$-AlCu and γ1-Al$_{4}$Cu$_{9}$ were 4 to 7 times that of the Cu and Al matrix metals. Nanohardness and Knoop microhardness measurement curves exhibited similar tendencies. The rigidity values of the respective intermediate phases can be arranged in descending order as follows: γ$_{1}$-Al$_{4}$Cu$_{9}$ > η$_{2}$-AlCu > θ-Al$_{2}$Cu.
Starting Page	849
Ending Page	855
Page Count	7
File Format	PDF
ISSN	15989623
Journal	Metals and Materials
Volume Number	22
Issue Number	5
e-ISSN	20054149
Language	English
Publisher	The Korean Institute of Metals and Materials
Publisher Date	2016-08-19
Publisher Place	Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cu/Al clad material intermetallics hot working diffusion transmission electron microscopy Metallic Materials Operating Procedures, Materials Treatment Magnetism, Magnetic Materials Engineering Thermodynamics, Heat and Mass Transfer Characterization and Evaluation of Materials Continuum Mechanics and Mechanics of Materials
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Mechanics of Materials Metals and Alloys Condensed Matter Physics

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