Al2TiO5Al2O3陶瓷复合材料的晶粒异向生长.pdf

39卷第4期 人 工 晶 体 学 报 v01．39N。．4 A12Ti05／A1203陶瓷复合材料的晶粒异向生长 崔旭，陈晓虎 (华侨大学材料物理化学研究所，泉州362021) ℃)，棒状A1：Tie，的长径比继续增加。而A1：03则始终为片状和等轴晶粒，且异向生长的A1：TiO，晶粒填充于 A1：03三角晶界处。研究表明，烧结温度的升高会促进晶体异向生长并增加其体积分数。AI：TiO，会阻碍A1：03基 体颗粒进一步生长，所以当A12TiO，颗粒平均尺寸随着烧结温度增加而增大，AI：O，基体晶粒生长几乎停滞。 关键词：A1203；A12TiO，；机械激活；各向异性生长 中图分类号：TB34 文献标识码：A GrainGrowthof Ceramic Anisotropic A12Ti05／A1203 Composite Xiao-hu CU／Xu，CHEN ofMaterials (Institute PhysicalChemistry，HuaqiaoUniversity，Qumhou362021，China) 2March 29March (Received 2010，accepted2010) of ceramic withthemoleratio1：4WaS mechanical Abstract：A12Ti05／A1203 composite preparedby activation．The of ceramic atdifferent wasstudied grain 03 composite temperature by growthA12Ti05／A12 electron energy spectroseopy X·raydiffraction(XRD)，scanningmicroscope(SEM)andX-ray dispersive XRD indicatedthatthe ofsintered age (EDS)．Thepatterns primarycrystallinephases samplesa-A1203 and SEMobservationsandEDS revealedthat ananisotropic A12Ti05．The microanalysis A12Ti05develope mierostructureatlow the to1450 startedto temperature(1350℃)．Astemperatureup oC，A12Ti05 grow of to with androd—like were ratio continuedincrease anisotropicallygrains developed．Thea