Effect of Ce addition on thermal conductivity of Mg-2Zn-1Mn alloy

The concentration dependence of thermal conductivity of as-cast and as-extruded Mg-2 wt.%Zn-1 wt.%Mn-[x] wt.%Ce (x = 0, 0.2 and 0.6) alloys was investigated using flash method at room temperature, respectively. According to the present experimental results, the thermal conductivity of as-cast ZM210.2-Ce alloy was higher than that of as-cast ZM21 and ZM21-0.6Ce alloys, while thermal conductivity of as-extruded alloys increased unconventionally with the Ce content increasing. The obtained highest thermal conductivity of as-extruded ZM21-0.6Ce alloy at room temperature was 133.29 W/(m.K). Meanwhile, as-extruded ZM21-xCe alloys exhibited higher thermal conductivity than their as-cast counterparts because of the precipitation of Mn particles and some intermetallic compounds containing Ce. Furthermore, the texture had an important effect on the thermal conductivity of as-extruded ZM21-xCe alloys. (C) 2015 Elsevier B.V. All rights reserved.