The Microstructural, Mechanical and Electrical Properties of Pb-Sn and Lead-Free SC0.7 Solders Containing Sub Micron Active Carbon Particles

Year 2024, , 1505 - 1514, 25.09.2024

Şükrü Talaş , Elif Özkan , Bahattin Ayar

https://doi.org/10.2339/politeknik.1313792

Abstract

Soldering is performed in order to easily assemble electronic components and also to provide electrical conductivity. The strengths, hardness, physical properties and electronic properties of the solders, i.e. reduced energy loss, hardness, melting point and longer service life, can be achieved when their usage is improvised by the help of necessary alloying or neutral additions. In this study, the effect of the addition of sub micron sized activated carbon on the mechanical, physical and electrical properties of industrially used solders, i.e. Pb-Sn and lead free SC0.7 solder was investigated.The thermal studies showed that the melting point of Pb-Sn was lowered against lead free solders with increasing amount of activated carbon. The tensile shear strength of both solders did not improve with increasing amount of activated carbon. In lead-free solders, the electrical resistance values decrease with respect to increasing active carbon ratio, however, the resistance of Pb-Sn solders increased. The addition of active particles have positively affected the microstructure of Pb-Sn solders, resulting in a finer grains, whereas, the addition of active carbon particles have no effect on the grain structures of lead free solder.

Keywords

Soldering, Lead –Free SC 07 Solders, Activated Carbons, Mechanical Properties, Electrical Properties

Supporting Institution

TÜBİTAK (2209A) ve Afyon Kocatepe Üniversitesi BAPK

Project Number

15.FEN.BİL.43

Thanks

The authors are grateful to TÜBİTAK and Afyon Kocateoe University Scientific Research Project Commission for financially supoorting this project.

Mikron Altı Aktif Karbon Parçacıkları İçeren Pb-Sn ve Kurşunsuz SC0.7 Lehimlerin Mikroyapısal, Mekanik ve Elektriksel Özellikleri

Abstract

Lehimleme, elektronik bileşenlerin kolayca monte edilebilmesi ve aynı zamanda elektriksel iletkenliğin sağlanması amacıyla yapılmaktadır. Lehimlerin mukavemetleri, sertlikleri, fiziksel özellikleri ve elektronik özellikleri, yani azaltılmış enerji kaybı, sertlik, ergime noktası ve daha uzun hizmet ömrü, kullanımları, gerekli alaşımlama veya nötr ilaveler yardımıyla doğaçlama yapıldığında elde edilebilir. Bu çalışmada, endüstriyel olarak kullanılan lehimlerin yani Pb-Sn ve kurşunsuz SC0.7 lehiminin mekanik, fiziksel ve elektriksel özelliklerine mikron altı boyutta aktif karbon ilavesinin etkisi incelenmiştir. Termal çalışmalar, Pb-Sn'nin erime noktasının, artan aktif karbon miktarı ile kurşunsuz lehimlere karşı düştüğünü göstermiştir. Her iki lehimin çekme kesme mukavemeti, artan aktif karbon miktarı ile gelişmemiştir. Kurşunsuz lehimlerde artan aktif karbon oranına göre elektriksel direnç değerleri düşerken, Pb-Sn lehimlerin direnci artmıştır. Aktif partiküllerin eklenmesi, Pb-Sn lehimlerinin mikro yapısını olumlu yönde etkileyerek daha ince taneler oluşmasına neden olurken, aktif karbon partiküllerinin eklenmesinin kurşunsuz lehimin tane yapıları üzerinde hiçbir etkisi olmamıştır..

Keywords

Lehimleme, Kurşunsuz SC 07 Lehimler, Aktif Karbonlar, Mekanik Özellikler, Elektriksel Özellikler

Project Number

15.FEN.BİL.43

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