湖南大学学报（自然科学版）2026，Vol.53Issue(6)：235-241,7.DOI:10.16339/j.cnki.hdxbzkb.2026324
Al8Mn5化合物制备及其提高铝合金耐蚀性机理的研究
Preparation of Al8Mn5 intermetallic powder and its mechanism for improving aluminum alloy corrosion resistance
摘要
Abstract
Micron-scale Al8Mn5 intermetallic powder was prepared by vacuum arc melting and high-energy ball milling.The composition,microstructure,and thermal stability of the Al8Mn5 intermetallic were analyzed by scanning electron microscopy,X-ray diffraction,and differential thermal analysis.Combined with corrosion experiments and first-principles calculations,the mechanism by which Al8Mn5 addition enhances the corrosion resistance of commercial purity aluminum containing iron impurity was studied.The results show that bulk Al8Mn5 intermetallic was successfully prepared by vacuum arc melting according to its chemical formula.The bulk Al8Mn5 intermetallic does not undergo phase transformation during high-energy ball milling and remains stable before 900℃.Adding Al8Mn5 intermetallic to commercial purity aluminum containing iron impurity can greatly improve the corrosion resistance.First-principles calculations show that iron atoms can replace Mn atoms in the Al8Mn5 crystal and form an Al8(Mn,Fe)5 substitutional solid solution to improve the corrosion resistance of pure Al.关键词
Al8Mn5/Fe杂质元素/耐蚀性/第一性原理计算Key words
Al8Mn5/Fe impurity element/corrosion resistance/first-principles calculations分类
矿业与冶金引用本文复制引用
彭国胜,杨胜东,顾亦诚..Al8Mn5化合物制备及其提高铝合金耐蚀性机理的研究[J].湖南大学学报（自然科学版）,2026,53(6):235-241,7.基金项目
安徽省高等学校自然科学研究重点项目(KJ2021A0406),Natural Science Foundation of Anhui Provincial Education Department(KJ2021A0406) （KJ2021A0406）
安徽省高校理工教师工程实践计划(2024jsqygz15),Enterprises Practice Plan of University Teachers Major in Science and Engineering in Anhui Province(2024jsqygz15) （2024jsqygz15）
校级大学生创新创业训练计划(2024003Y),University Innovation and Entrepreneur-ship Training Program for College Students(2024003Y). （2024003Y）
