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Microstructure and thermal conductivity of hypereutectic Al-high Si produced by casting and spray deposition

Published online by Cambridge University Press:  09 September 2016

Yandong Jia ,
Fuyang Cao ,
Pan Ma ,
Sergio Scudino ,
Jürgen Eckert ,
Jianfei Sun  and
Gang Wang
Yandong Jia
Affiliation:
Institute of Materials, Shanghai University, Shanghai 200444, China; and School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Fuyang Cao
Affiliation:
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Pan Ma
Affiliation:
School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
Sergio Scudino
Affiliation:
IFW Dresden, Institute for Complex Materials, D-01171 Dresden, Germany
Jürgen Eckert
Affiliation:
Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstraße 12, A-8700 Leoben, Austria; and Department Materials Physics, Montanuniversität Leoben, Jahnstraße 12, A-8700 Leoben, Austria
Jianfei Sun
Affiliation:
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Gang Wang*
Affiliation:
Institute of Materials, Shanghai University, Shanghai 200444, China
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

The Al–50Si alloy, as a kind of potential electronic packaging material, is manufactured by different methods, such as casting and spray deposition. The possible influences of the P refiner on the microstructure of the Al–50Si alloy are investigated at different cooling rates. The refinement mechanism of primary Si phase is discussed in view of the P refiner addition, and the variation of the cooling rates. The thermal conductivity (TC), as a key parameter for electronic materials, is measured. The coupled effects of the cooling rate and the addition of the P refiner during the solidification of the Al–50Si alloy on the TC are elucidated based on structural observations. Furthermore, the porosity in the Al–50Si alloy is treated as a second phase influencing the TC.

Keywords

spray-depositedhypereutectic Al-high Si alloysmicrostructurethermal conductivity
Type
Articles
Information
Journal of Materials Research , Volume 31 , Issue 19 , 14 October 2016 , pp. 2948 - 2955
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Copyright
Copyright © Materials Research Society 2016 

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