稀土加入镁合金或铝合金(一般含量1.5～5.0％)可提高室温与高温机械性能。纯铝中加入2％左右稀土可使硬度提高一倍。在青铜和黄铜中加入微量稀土可提高材料的强度、加工性能、耐热性和导电性。紫铜中加入微量稀土混合金属可以脱氧除气,使合金晶粒变细。南京工学院材料系最新研究表明,在铝及其合金中加入适量稀土,具有净化、去除杂质 Rare earth to join magnesium alloy or aluminum alloy (general content 1.5 ~ 5.0%) can improve the mechanical properties at room temperature and high temperature. Adding about 2% pure aluminum can make the hardness doubled. Addition of trace rare earths to bronze and brass improves the strength, processability, heat resistance and electrical conductivity of the material. Adding trace rare earth copper mixed metal deaeration degassing, the alloy grain thinning. Nanjing Institute of Technology Department of Materials latest research shows that adding aluminum and its alloys in the right amount of rare earth, with purification, removal of impurities