摘要
采用化学共沉淀法制备了Al_2O_3数量分数为0％～30％的ZrO_2(3Y)／Al_2O_3纳米复合粉体,研究了Al_2O_3含量和煅烧温度对粉体相结构、晶粒尺寸和晶格畸变的影响。结果表明：800℃×2h煅烧的复合粉体只出现t-ZrO_2相,不出现Al_2O_3的任何晶相；Al_2O_3的添加抑制了ZrO_2 (3Y)晶粒的增长和四方相向单斜相的结构相变,使相变温度显著提高,晶格畸变增大。
ZrO2 （3Y） nano-sized powders containing 0% - 30mass% Al2O3 were prepared by coprecipitation method. The effects of Al2O3 content and calcining temperature on phase structure, grain size and lattice distortion were studied. Only t-ZrO2 phase was found when powders were calcined at 800 ℃ for 2 h. The dopants of Al2O3 greatly inhibited the increase of crystallite size and the phase transformation from tetragonal to monoclinic, also made the phase transformation temperature and crystal lattice distortion increase.
出处
《机械工程材料》
CAS
CSCD
北大核心
2006年第7期75-78,共4页
Materials For Mechanical Engineering
基金
国家创新研究群体基金(50421502)
国家自然科学基金(50575218
50575217)
