Degradation of Spark Plasma Sintered (0, 5, 10 and 15 mol%) CeO2 + YSZ Composites in Supercritical Water
Cubic Yttria-stabilized zirconia (c-YSZ) is a candidate material for high temperature applications due to its chemical inertness, high thermal stability and low thermal conductivity. In addition, due to c-YSZ’s high radiation stability, there is a new interest in this ceramic for thermal insulating cladding material in Supercrticial Water Nuclear Reactors (SCWR). However, due to the aggressive environment of supercritical water, the degradation behaviour of the ceramic must be well understood prior to its industrial application. In this research, moderately dense 8 mol% Yttria stabilized zirconia (YSZ) as well as YSZ composites containing 5, 10 and 15 mol% CeO2 were fabricated via Spark Plasma Sintering (SPS) and subjected to static corrosion testing in supercritical water (SCW) at 400°C and 31MPa. Weight loss and crystal lattice changes associated with SCW exposure were studied.
B. Mishra, M. Ionescu and T. Chandra
A. Siebert-Timmer and L. Bichler, "Degradation of Spark Plasma Sintered (0, 5, 10 and 15 mol%) CeO2 + YSZ Composites in Supercritical Water", Materials Science Forum, Vols. 783-786, pp. 1093-1098, 2014