Document Details

Document Type : Thesis 
Document Title :
A Study of Microstructure and Mechanical Properties of Some Sn-Zn- In Lead Free Soldering Alloys
دراسة الخواص التركيبية والميكانيكية لبعض سبائك اللحام ( قٌصدير- زنك – انديوم) الخالية من الرصاص
 
Subject : physics department 
Document Language : Arabic 
Abstract : Solder joints supply a good mechanical strength and appropriate electrical conductivity for electronic devices. Despite the fact that, various solder alloys are available, a Sn-37Pb eutectic is the most favored solder alloy in electronic applications owing to its superior surface tension, melting temperature and wettability. Unfortunately, it did not show promising application in the electronic industry due to a ground water pollution problem and toxicity owing to the difficult environmental issues related to the use of lead containing solders. Many attempts have been devoted in the last decades for developing solder alloys free of lead to avoid the hazards of these leads on the human health and to enlarge its industrial applications especially in the microelectronic packing technology. The developed substitutes must be eutectic alloy with melting temperature near from the melting temperature of Sn-Pb alloys. These features were found in Sn-Zn alloys. Herein, various compositions of the Sn-Zn-In solder alloy were prepared. In this study we have prepared Sn-9wt.Zn-1wt%In, Sn-9wt.Zn-2wt%In, Sn-9wt.Zn-3wt%In, Sn-9wt.Zn-4wt%In and Sn-9wt.Zn-5wt%In for improving soldering instead of using Sn-9Zn and get proper soldering characteristics and suitable creep behavior. Owing to the relative low melting temperature of the Sn-Zn alloys, the appropriate operating temperature range of 40-100 oC corresponds to high homologous temperatures(>0.65 Tm) at which creep is the most important deformation mechanism. It has been reported thermal mismatch between electronics packages and substrates and /or power on /off cycles, is of high attention. In this work we have studied the mechanical and structural properties using different thermal analysis techniques such as X-ray diffraction (XRD) and metallurgical microscope for the proposed alloys. 
Supervisor : Dr. Farag Al-Hazmi 
Thesis Type : Master Thesis 
Publishing Year : 1434 AH
2013 AD 
Co-Supervisor : Dr. Ali Abdel-Daiem 
Added Date : Wednesday, October 2, 2013 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
امنه مساعد العوفيALofi, Amnh MusedResearcherMaster 

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