铜业工程Issue(1)：19-29,11.DOI:10.3969/j.issn.1009-3842.2026.01.002
C19400铜合金带材缺陷分析
Defect Analysis of C19400 Copper Alloy Strip
摘要
Abstract
Surface defects in C19400 copper-iron alloys significantly degrade both electrical conductivity and mechanical properties,posing a key limitation on their application in high-end semiconductor packaging and electronic components.In this paper,origins and microscopic morphology of compositional defects in C19400 copper strips were systematically investigated.Distribution behavior of elements in the copper matrix was first predicted using Miedema model for thermodynamic calculations of Cu-Fe-P system.Subsequently,the defective samples were characterized in terms of microstructure and composition through methods including spark discharge optical emission spectrometry,scanning electron microscopy,and energy-dispersive spectroscopy.Results revealed the presence of various inclusion defects and precipitation in C19400 copper strips.Specifically,oxide inclusions appeared as irregular flakes;carbides aggregated as dark fine particles in localized areas;phosphides were distributed inside pits;hard inclusions were embedded as irregular particles within the pits,and precipitates aligned in elongated forms along the rolling direction.Traceability analysis indicated that compositional defects introduced during the melting and casting stages remained through manufacturing process to strip stage.Subsequent rolling and annealing treatments further altered the size and distribution of these inclusions.This study clarified the evolution path and microstructural characteristics of these defects,providing a theoretical and experimental basis for optimizing processing of C19400 and enhancing reliability of this material in high-end electronic applications.关键词
C19400铜合金带材/成分缺陷/微观组织/夹杂物/性能分析Key words
C19400 copper strip/composition defect/microstructure/inclusion/performance analysis分类
矿业与冶金引用本文复制引用
魏迎辉,梁晖洁,刘伟,柴胜利,吕俊栋,杨景召..C19400铜合金带材缺陷分析[J].铜业工程,2026,(1):19-29,11.基金项目
运城市2024年科技计划项目(YCKJ-2024014)资助 （YCKJ-2024014）
