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HA-n-ZrO2核壳层复合陶瓷微粉材料的制备与表征

, PP. 170-173

Keywords: 四方相氧化锆,羟基磷灰石,复合陶瓷,水热,力学性能

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Abstract:

采用水热-沉积原位分步反应法,制备了羟基磷灰石(HA)-氧化锆(ZrO2)复合微粉,采用XRD和TEM对复合微粉的物相、形貌和大小进行了表征。对复合微粉进行模压成型、热处理制备了复合陶瓷试样,并测试其力学性能。结果表明:所得复合微粉以纳米级四方相ZrO2为"核心",逐层包覆HA,形成核-壳层结构(HA-n-ZrO2);复合微粉也呈纳米尺度,且晶化度良好,随着HA含量的增加,包覆层逐步加厚。复合微粉中HA质量分数由0增大至100%时,所得成型陶瓷的抗弯强度和平均维氏硬度分别由183MPa降至61MPa以及781.75MPa降到131.76MPa,表明ZrO2的存在对于增大陶瓷体的力学性能确能起到"核心"关键作用。

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