Characterization of Stochastically Distributed Voids in Sintered Nano-Silver Joints

To better understand the mechanical behaviour of a sintered nano-silver joint, it is quite necessary to develop a characterization method to quantitatively describe the stochastically distributed voids existing in it. In this paper, by virtue of a Cartesian coordinate system, the stochastically distributed voids in the sintered nano-silver joint are characterized with three parameters, which are the distance “l”, radius “r” and location angle “$\alpha$”. And then by fitting these extracted parameters into certain distributions, for instance Normal distribution for “l” and “r”, and Uniform distribution for “$\alpha$”, the distribution feature of the voids can be quantitively characterized. It is also found that the accuracy of these distribution parameters is highly dependent on the number of voids in the nano-silver joint. The proposed method is successfully to account for the pressure effect on void distribution in sintered nano-silver joints.