Influence of GdCl₃ addition on purifying effectiveness and properties of Mg-10Gd-3Y-0.5Zr alloy

来源期刊：中国有色金属学报(英文版)2010年第7期

论文作者：吴国华 王玮 孙明 王渠东 丁文江

文章页码：1177 - 1183

Key words：magnesium alloy; rare earth element; nonmetallic inclusions; refining; corrosion; fluidity

Abstract: In order to improve the purifying efficiency of RJ6 flux, 5% (mass fraction) GdCl₃ was introduced into the flux for refining Mg-10Gd-3Y-0.5Zr (GW103K) alloy. The results show that the RJ6 flux containing 5% GdCl₃ exhibits better adsorption ability to nonmetallic inclusions than the one without GdCl₃. Moreover, the mechanical, corrosion properties and fluidity of the alloy refined with RJ6 flux and RJ6 flux containing 5% GdCl₃ were investigated, respectively. It is found that these properties are improved to a certain degree due to the removal of nonmetallic inclusions in the alloy. Thermodynamic analysis and surface tension experiments indicate that the main reason can be ascribed to the decrease of the surface tension of the flux with 5% GdCl₃, which promotes the combination of flux and nonmetallic inclusions.

基金信息：Program of Shanghai Subject Chief Scientist
the National Basic Research Program of China