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

这是加强陶瓷材料技术合作项目的第二年延续。对含铪材料的基础研究将被执行，以了解陶瓷马氏体转变，在非常高的化学驱动力。将研究两种对比的基体材料——一种含有分散铪粒子的难熔bcc金属，以及一种含有类似粒子的全陶瓷材料。这是一种新的陶瓷材料体系，将允许更广泛的物理参数变化，这被认为是相变增韧的重要因素。具体来说，它比氧化锆合金的参数更高，氧化锆合金是唯一研究过的其他体系。通过研究第二种陶瓷体系（HfO2），将对半氧化锆和氧化锆陶瓷的相变增韧有更深入的了解。

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.