JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Effect of Cu Addition on Thermal Properties of Mg-6Zn-xCu alloys
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
  • Journal title : Journal of Korea Foundry Society
  • Volume 35, Issue 4,  2015, pp.67-74
  • Publisher : The Korean Foundrymens Society
  • DOI : 10.7777/jkfs.2015.35.4.067
 Title & Authors
Effect of Cu Addition on Thermal Properties of Mg-6Zn-xCu alloys
Ye, Dea-Hee; Kim, Hyun-Sik; Kang, Min-Cheol; Jeong, Hae-Yong;
  PDF(new window)
 Abstract
In this study, Mg-Zn alloys are investigated in terms of their thermal properties after an addition of Cu. Al element is added to improve the mechanical properties and castability in general case. However, it was excluded here because it significantly decreases the thermal conductivity. On the other hand, Zn was added as a major element, which had less influence on reducing the conductivity and can complement the mechanical properties as well. Cu was also added, and it improved the heat transfer characteristics as the amount was increased. The composition ranges of Zn and Cu are 6 wt.% and 0~1.5 wt.%, respectively. Mg-6Zn-xCu alloy was prepared by a gravity casting method using a steel mold and then the thermal conductivity and the microstructure of the as-cast material were investigated. By measuring the density_(), specific heat_(Cp) and thermal diffusivity_(), the thermal conductivity_() was calculated by the equation . As the amount of Cu increased in the Mg-6Zn-xCu alloy, the heat transfer characteristics were improved, resulting in a synergistic effect which is slow when the added Cu exceeds 1 wt.%. In order to investigate the relative thermal conductivity/emission of the Mg-6Zn-xCu alloy, AZ91 and AZ31 were experimentally evaluated and compared using a separate test equipment. As a result, the Mg-6Zn-1.5Cu alloy when compared to AZ91 showed improvements in the thermal conductivity ranging from 30 to 60% with a nearly 20% improvement in the thermal emission.
 Keywords
Mg-6Zn-xCu alloys;Thermal diffusivity;Thermal conductivity;Thermal emission;Effect of Cu addition;
 Language
Korean
 Cited by
 References
1.
Ehrenberger S and Friendrich HE, 9th International Conference on Magnesium Alloys and their Application, "Greenhouse gas balance of magnesium parts for automotive application", Vancouover (2012) 5-12.

2.
Dong CM, IMA 70th Annual World Mg Conf. Proc., "New opportunity & market for enlarging magnesium application", Xi'an (2013) 103-112.

3.
Andres DV and Revilla VA, IMA 71th Annual World Mg Conf. Proc., "New magnesium application", Munich (2014) 43-51.

4.
Kim HS, Ye DH and Kang MC, J. Korea Foundry Society, "Development trend of magnesium technology", 31 (2011) 243-248. crossref(new window)

5.
Kim JK, Nakayama W and Lee SK, J. Kor. Soc. Pre. Eng., "Characterization of a thermal interface material with heat spreader", 27 (2010) 91-98.

6.
Son IS and Shin SS, J. KIEEME., "A study of characteristics of heat dissipation carbon magnesium new material of LED lighting", 26 (2013) 915-919.

7.
ASM Specialty Handbook, "Magnesium and Magnesium Alloys", (1999) 237-245.

8.
Yamasaki M and Kawamura Y, Scripta Mater., "Thermal diffusivity and thermal conductivity of Mg-Zn-Rare earth element alloys with long-period stacking ordered phase", 60(2009) 264-267. crossref(new window)

9.
Kyocera Chemical Corp., JP Patent P2006-170063, "Magnesium Alloy, and OA equipment parts", (2006).

10.
Jeal N, Advanced Material & Processes, ASM Int., "High-Performance Magnesium", (2005) 65-67.

11.
Hamiton J et. al., Proceedings of the TMS 141st Annual Meeting and Exhibition, "Microstructural characteristics of high rate plastic deformation in $Elektron^{TM}$ WE43 magnesium alloy", Orlando (2012) 443-438.

12.
Lee SH et. al., Int. J. Thermophys, "Thermal conductivity of magnesium alloys in the temperature range from $-125^{\circ}C\;to\;400^{\circ}C$", 30 (2012) 2343-2350.

13.
Japan Mg Asso., "Handbook of Advanced Magnesium Technology", (2000) 55-70.

14.
Rudajevova A, Stanek M and Lukac P, Mater. Sci. Eng. A, "Determination of thermal diffusivity and thermal conductivity of Mg-Al alloys", 341 (2003) 152-157. crossref(new window)

15.
Hwang JH et. al, Kor. J. Mater. Res., "Grain refining and age hardening of Mg-Zn alloys by addition of Cu and Si", 5 (1995) 682-689.

16.
Hur NS, Kim IH and Kim YY, J. Industrial Technology Res. Inst., Chinju Nat. Univ., "Grain refining of Mg-Zn alloys by the addition of copper", 3 (1996) 99-105.

17.
Nayeb-Hashemi AA and Clark JB, "Binary Alloy Phase Diagrams, 2nd ed.", (1988) Vol. 2 1433-1435.

18.
Ye DH, Kim HS, Kang MC, Kim JD and Jeoung HY, J. Korea Foundry Society, "Electrical conductivity by addition of Zn and Cu on Mg-Zn-Cu alloys", 34 (2014) 100-106. crossref(new window)

19.
Yuan JW et. al., J. Alloys and Compound, "Thermal characteristics of Mg-Zn-Mn alloys with high specific strength and high thermal conductivity", 578 (2013) 32-36. crossref(new window)