一、前言随着科学技术的发展,人们对稀土元素(以下简称稀土)的认识越来越深刻,稀土在工业实践和日常生活中的作用越来越显著。由稀土“七五”规划可知,在有色金属领域内,国家仍然将稀土在铝及其合金中的应用列为首要地位来考虑。稀土在铝及其合金中的机理和行为,通 I. Introduction With the development of science and technology, people’s understanding of rare earth elements (hereinafter referred to as rare earth) is more and more profound. The role of rare earth in industrial practice and daily life is more and more obvious. According to the “Seventh Five-Year Plan” of rare earths, we can see that in the non-ferrous metal industry, the country still considers the application of rare earths in aluminum and its alloys as a priority. Mechanism and Behavior of Rare Earth in Aluminum and Its Alloys