Comparison of mechanical and dynamic techniques for measurements of young's modulus and poisson's ratio: C-J. Yu and T. Prucher (Concurrent Technologies Corp, USA)

Abstract

The aim of this study is to gain a better understanding of the behaviour of sintered silver layers for e.g. power electronic applications in corrosive environments. It explicitly deals with the influence of corrosion products on the mechanical properties using Nanoindentation measurements. In addition to these measurements, analytical investigations and porosity analyses are performed. Existing studies mainly deal with the investigation of unaged sintered silver layers or the influence of thermomechanical ageing on the mechanical properties. In contrast, this study focuses on the investigation of the influence of corrosion on the mechanical properties of sintered silver layers. The results show that an increased Young's modulus can be detected by Nanoindentation measurements on corrosion-stressed highly porous sintered silver. In addition, increased indentation hardness is also determined. Besides the already known influences on the Young's modulus, a significant influence on the corrosion pattern of the sintered silver layers can be shown. The results are discussed with regard to a filled pore system of the samples.