Industry/University Cooperative Research Activity: Funda- mental Experimental Studies of the Micro-transformation in Hafnia Containing Materials (Materials Research)

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This is the second year continuation of a cooperative project in techniques to strengthen ceramic materials. Fundamental studies of hafnia-containing materials will be performed to understand the ceramic martensitic transformations, under very high chemical driving forces. Two contrasting matrix materials--a refractory bcc metal containing a dispersion of hafnia particles, and an all-ceramic material containing similar particales--will be studied. This is a new ceramic material systems and will allow a wider variation in physical parameters believed to be important in transformation toughening. Specifically, there are higher parameters than for zirconia alloys, the only other system researched. By studying this second ceramic system (HfO2), insight into transformation toughening for both hafnia and zirconia ceramics will be gained.