Priority Research Centre for
GEOTECHNICAL SCIENCE AND ENGINEERING

Interdiffusion and Demixing in Materials

Many materials depend on interdiffusion in their formation. In service, the components of many materials demix as a result of the high temperatures and large driving forces present. This can lead to a degradation of designed properties. In this long-standing program we have been investigating all aspects of the interdiffusion and demixing processes in technologically important materials. At present, we are examining cation demixing processes in the solid electrolytes: yttria-stabilized zirconia and magnesium and strontium doped lanthanum gallate as well as interdiffusion in a number of multicomponent alloys including austenitic stainless steels.