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不同Al2O3含量ZrO2(3Y)/Al2O3纳米复合粉体的制备与表征
Preparation and Characterization of ZrO2(3Y)/Al2O3 Nano-sized Powders with Various Al2O3 Contents
【摘要】 采用化学共沉淀法制备了Al2O3数量分数为0%~30%的ZrO2(3Y)/Al2O3纳米复合粉体,研究了Al2O3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-ZrO2相,不出现Al2O3的任何晶相;Al2O3的添加抑制了ZrO2 (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。
【Abstract】 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.
【关键词】 ZrO2(3Y)/Al2O3纳米复合粉体;
相变;
晶格畸变;
【Key words】 ZrO2(3Y)/Al2O3 compound nano-sized powder; phase transforrnation; distortion;
【Key words】 ZrO2(3Y)/Al2O3 compound nano-sized powder; phase transforrnation; distortion;
【基金】 国家创新研究群体基金(50421502);国家自然科学基金(50575218,50575217)
- 【文献出处】 机械工程材料 ,Materials for Mechanical Engineering , 编辑部邮箱 ,2006年07期
- 【分类号】TB383.1
- 【被引频次】5
- 【下载频次】121