稀土氧化物稳定氧化锆陶瓷的铁弹增韧  

Ferroelastic Toughening in Rare Earth Oxide Stabilized Zirconia Ceramic

作　　者：赵蒙[1] 贾秋阳[1] 刘瀚文[1] 雷宇雄 潘伟[1] 

机构地区：[1]清华大学 新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《稀有金属材料与工程》2013年第S1期473-476,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51272120)

摘　　要：采用化学共沉淀法制备了5种不同成分的稀土氧化物部分稳定氧化锆的粉体,并通过无压烧结制备了致密的陶瓷块体。测试了样品的物相和晶格结构,并用显微压痕法测定了样品的断裂韧性。结果表明,铁弹增韧效应对陶瓷样品断裂韧性的提高起到了重要的作用。Chemical co-precipitation method was used to synthesize five kinds of rare earth partial stabilized zirconia powder and pressureless sintering was used to prepare dense monolith samples of those compositions. By X-ray diffraction, the phase and lattice structure were investigated. And micro-indentation method was applied to measure the fracture toughness of all the samples. Confirmed by the relationship between fracture toughness and lattice structure, the toughening is attributed to the ferroelastic mechanism.

关 键 词：部分稳定氧化锆 断裂韧性 铁弹增韧 四方度 

分 类 号：TQ174.1[化学工程—陶瓷工业]