چکیده مقاله
The miniaturization and compaction trends in electronic equipment and the removal oflead Pb element from solder alloys due to environmental considerations have created agreat challenge in the field of designing and developing of new solder alloys Therefore,researchers have recently focused on composite solder alloys using reinforcing particlesto improve the reliability of lead free solders In this research, SAC0307 solder alloys 99 wt % Sn, 0 3 wt % Ag, and 0 7 wt % Cu with different percentages of cobaltmicroparticles were made by the Accumulative Roll Bonding ARB method Then, theeffect of the particles on wettability, microstructures and mechanical characteristics ofsolder alloys was investigated The lowest contact angle was 23◦ in 0 2 wt % cobaltsample By adding cobalt to the solder matrix, the size of intermetallic compounds IMCs , Cu6Sn5 and Ag3Sn, decreased and the percentage of eutectic phases increased The shape of the interfacial intermetallic compounds changed from scallop to layer shapeby adding cobalt, and their average thickness increased about 13 73% in compositesamples The shear strength of solders increased up to 28% by enhancement of cobaltmicroparticles in the solder alloy containing 0 4 wt % cobalt; however, shear strengthwas decreased in the composite solder containing 1 wt % cobalt due to the agglomerationof microparticles The shear fracture surfaces showed that the nature of the fracturechanged from ductile fracture in the form of elongated dimples to brittle fracture in theform of cleavage with the increase in the percentage of cobalt microparticles Thecomposite solder alloys containing 0 2 0 4 wt % Co have the best wettability behaviorand tensile shear strength
کلیدواژه‌ها
نویسندگان
M. H Nourmohammadi
MSc student, Faculty of Materials Science and Engineering, Sharif University of Technology
M Movahedi
Associate Professor, member of the Faculty of Materials Science and Engineering, Sharif University ofTechnology
A. H Kokabi
Professor, member of the faculty of Materials Science and Engineering, Sharif University ofTechnology
M Tamizi
PhD student, Faculty of Materials Science and Engineering, Sharif University of Technology
شیوه ارجاع
Nourmohammadi, M. H and Movahedi, M and Kokabi, A. H and Tamizi, M,1401,Investigation of microstructure and mechanical properties of lead freecomposite solder containing cobalt microparticles produced byaccumulative roll bonding,5th International Conference on Welding and Non Destructive Testing & 23rd National Conference on Welding & Inspection & 12th National Conference on NDT,Isfahan
ارائه‌شده در
مجموعه مقالات پنجمین کنفرانس بین المللی جوشکاری و آزمایش های غیرمخرب،بیست و سومین کنفرانس ملی جوش و بازرسی و دوازدهمین کنفرانس ملی آزمایش های غیرمخرب و اولین کنفرانس ملی ساخت افزایشی10 اسفند 1401 · اصفهان