X-Ray Diffraction Characteristics of Kovar Alloy and Al₂O₃ Ceramics

Abstract

In order to study the residual stress of Al2O3 ceramics and kovar alloy after brazing, this article conducted both X-ray diffraction and strain gauges measurement. Using Stress diffractometer and constant strength beam calibration method to examine the x-ray diffraction characteristics of these two materials. And compare measured results and theoretical results. It is shows that the Al2O3 ceramics has two obvious diffraction peaks in 140°~170°, where the diffraction peak at 2θ=153° can reflect the changes of stress more accurately then one at 2θ=146°. For kovar alloy, there is only one diffraction peak at 2θ=149° in range of 140°~170° and it has good linear relationship with stress.

Using the Size Strain Plot Method to Specity Lattice Parameters

“…It is especially important in adsorption, heterogeneous catalysis, and surface reactions. SSA denotes the Surface Area (SA) per mass according to [13] (Zhang et al, 2016). The specific surface area and the surface-to-volume ratio of materials increase dramatically as their size decreases [14].…”