Microstructural Evolution and Shear Strength of Nano-Ag Paste Joints with Variable Sintering Temperatures and Particle Sizes
Publication Date
1-1-2025
Document Type
Conference Proceeding
Publication Title
Minerals Metals and Materials Series
DOI
10.1007/978-3-031-80748-0_82
First Page
941
Last Page
947
Abstract
This study investigates the effects of different sintering temperatures and nano-silver (Ag) particle sizes on the microstructure and shear strength of Ag/nano Ag paste/Ag joints. Three types of nano-Ag pastes with varying particle sizes were prepared. Results revealed that higher sintering temperatures improved both densifi cation andshearstrength. Specifically, joints made with 70 nmAgparticlesexhibited better densification and shear strength compared to those with 20 nm Ag particles, due to the higher packing density and more effective diffusion of the larger particles. However, shear strength of 20 nm, 70 nm, and 20/70 nm Ag joints decreased after testing at 250 °C and after 500 hours of aging at the same temperature, although it remained above 30 MPa. This reduction was attributed to atomic diffusion at grain boundaries and coarsening of the sintered nano-Ag structure. These findings high light the potential of nano-Ag paste for use in die attachment in electronic power devices.
Keywords
Mechanical properties, Nano-Ag paste, Sintering mechanisms, Sintering temperature
Department
Aviation and Technology
Recommended Citation
Changcheng Zheng, Roman Bolzowski, Ming Liu, Dekui Mu, and David Yan. "Microstructural Evolution and Shear Strength of Nano-Ag Paste Joints with Variable Sintering Temperatures and Particle Sizes" Minerals Metals and Materials Series (2025): 941-947. https://doi.org/10.1007/978-3-031-80748-0_82
