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氧化锆(ZrO_2)马氏体相变增韧是改善陶瓷材料性能的重要途径,研究 ZrO_2的马氏体形态对相变增韧具有重要意义,本文利用透射电镜研究了 ZrO_2(Y_2O_3)-Al_2O_3陶瓷中各相的形态。观察分析表明 ZrO_2(Y_2O_3)固溶体中马氏体相变有两种类型:第一类马氏体(M_Ⅰ),其孪生面为(010)、(001)、(011)和(011);第二类马氏体(M_Ⅱ),其孪生面只可能是(011)和(011)。并在 M_Ⅰ中发现相变后形成的形变李晶,在 M_Ⅱ中发现二次衍射参与成象后形成的水纹图。还发现在未转变的面心四方(FCT)相 ZrO_2(Y_2O_3)固溶体中,局部区域出现调幅结构。
Zirconia (ZrO_2) martensitic transformation toughening is an important way to improve the properties of ceramic materials. Studying the martensite morphology of ZrO_2 is of great significance for phase transition toughening. In this paper, the effects of ZrO_2 (Y_2O_3) -Al_2O_3 ceramics In each phase of the form. The observation and analysis show that there are two types of martensite transformations in the ZrO_2 (Y_2O_3) solid solution: the first type of martensite (M_Ⅰ) with the twin planes of (010), (001), (011) and (011) The second type of martensite (M_Ⅱ), its twin surface may only be (011) and (011). And found in the M_ Ⅰ phase change formed after the deformation of Li Jing, found in M_ Ⅱ secondary diffraction involved in the image formed after the water pattern. It is also found that in the untransformed FCT ZrO_2 (Y_2O_3) solid solution, the amplitude modulation structure appears in the local area.