首页>
外国专利>
Material and method of forming yttria-stabilized zirconia to minimize low-temperature degradation
Material and method of forming yttria-stabilized zirconia to minimize low-temperature degradation
展开▼
机译:形成氧化钇稳定的氧化锆以最小化低温降解的材料和方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
The invention is directed to a material and a method of substantially eliminating destructive low-temperature, humidity-enhanced phase transformation of yttria-stabilized zirconia in general, as well as eliminating low-temperature degradation of yttria-stabilized tetragonal zirconia polycrystalline ceramic (Y-TZP). The martensitic-type phase transformation from tetragonal to monoclinic is accompanied by severe strength degradation in a moist environment at low-temperature, specifically at room temperature as well as at body temperature. This class of materials has been chosen as the packaging material for small implantable neural-muscular sensors and stimulators because of the high fracture toughness and high mechanical strength. This destructive phase transformation has been substantially eliminated, thus ensuring the safety of long-term implants, by subjecting the sintered components to post-machining hot isostatic pressing, such that the average grain size is less than about 0.5 microns.
展开▼