Design of Mg-Zn-Si-Ca casting magnesium alloy with high thermal conductivity  

作　　者：V.E.Bazhenov A.V.Koltygin M.C.Sung S.H.Park A.Yu.Titov V.A.Bautin S.V.Matveev M.V.Belov V.D.Belov K.V.Malyutin 

机构地区：[1]National University of Science and Technology“MISiS”,Leninskiy pr.4,Moscow 119049,Russia [2]LG Electronics Inc.,Yeoui-daero,Yeongdeungpo-gu.128,LG Twin Tower,Seoul 07336 Republic of Korea

出　　处：《Journal of Magnesium and Alloys》2020年第1期184-191,共8页镁合金学报（英文）

摘　　要：Magnesium alloys are commonly used to produce lightweight parts.While most magnesium alloys exhibit low thermal conductivities,high thermal conductivities are needed for electronic devices.In this study,we attempted to develop new magnesium casting alloys with high thermal conductivities.The Mg-Zn-Si-Ca alloy compositions were chosen using CALPHAD(CALculation of PHAse Diagrams)calculations,and alloy samples were prepared.The fluidity and hot-tearing resistance were measured.The results indicated that these properties were similar to those of AZ91 alloy.Tensile tests showed that high-pressure die casting could produce Mg-Zn-Si-Ca alloys possessing mechanical properties 1.5-3 times higher than those produced via sand casting.The alloy thermal conductivity was 126 W/mK at room temperature.The corrosion rates of the as-cast samples in NaCl/water solutions were two times higher than that of AZ91.

关 键 词：Magnesium alloy Thermal conductivity Phase composition Corrosion rate Sand casting High-pressure die casting 

分 类 号：TG146.22[一般工业技术—材料科学与工程]