2024

Nedeljković, Milan 
Mladenović, Srba 
Petrović, Jasmina 
Stamenković, Uroš 
Mitrović, Milijana 

Mining and Metallurgy Institute Bor

Proceedings - 55th International October Conference on Mining and Metallurgy - IOC 2024, 15-17 October 2024, Kladovo, Serbia

295

300

English

M33 - Conference paper at an international conference, printed in full

The development of various types of so-called "environmentally friendly" solders has been extensively investigated worldwide as an alternative to lead-based solders. This study investigated the influence of graphene nanoparticles on the microstructure and thermal properties of lead-free solders. Nanocomposite solders were produced using the powder metallurgy method. Graphene nanoparticles were used as reinforcement in the form of graphene nanosheets (GNS). Microstructural analysis showed that the GNS particles were homogeneously distributed along the grain boundaries, resulting in a refined β-Sn structure. At room temperature, density was measured using the Archimedes method, while thermal diffusivity was determined using the flash method. The thermal conductivity of the Sn-0.7Cu nanocomposite solders was calculated using a fundamental equation. Increasing the GNS content up to 0.08 wt% in the Sn-0.7Cu solder matrix led to a slight decrease in the density of the nanocomposite solders compared to the base solder, while the highest thermal conductivity was achieved with a 0.05 wt% GNS addition, reaching 44.74 Wm⁻¹ K⁻¹.

The research presented in this paper was done with the financial support of the Ministry of Science, Technological Development and Innovation of the Republic of Serbia, with the funding of the scientific research work at the University of Belgrade, Technical Faculty in Bor, according to the contract with registration number 451-03-65/2024-03/200131.

Lead-free solder alloys, powder metallurgy, graphene nanosheets

DOI

10.5937/IOC24295N

ISBN

978-86-7827-053-6

URI

https://repozitorijum.tfbor.bg.ac.rs/handle/...