| 电子束激发氧化锆马氏体相变的研究 |
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| 引用本文： | 徐昕,徐炜,李永红.电子束激发氧化锆马氏体相变的研究[J].上海有色金属,1989(1). |
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| 作者姓名： | 徐昕 徐炜 李永红 |
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| 作者单位： | 北京有色金属研究总院，北京有色金属研究总院，北京有色金属研究总院 |
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| 摘 要： | 用JEM-2000FX分析型透射电镜研究了以Al_2O_3为基体、ZrO_2为第二相的氧化锆增韧氧化铝(ZTA)陶瓷。发现马氏体条在ZrO_2/Al_2O_3界面上产生,长大极快,止于ZrO_2/Al_2O_3及ZrO_2/ZrO_2界面,薄膜表面或晶粒内其它马氏体表面上。增强电子束,马氏体条就可穿过ZrO_2/ZrO_2界面,使相邻晶粒中产生马氏体相变。含Y高的ZrO_2相变困难。少数t-ZrO_2,在强电子束照射下不发生相变。
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| 关 键 词： | 电子束激发 氧化锆 马氏休 相变 透射电镜 |
Study on Matensitic Transformation of Zirconia Excited by Electron Beam |
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| Xu Xin,Xu Wei,Li Yonghong.Study on Matensitic Transformation of Zirconia Excited by Electron Beam[J].Shanghai Nonferrous Metals,1989(1). |
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| Authors: | Xu Xin Xu Wei Li Yonghong |
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| Affiliation: | Beijing General Research Institute of Non-ferrous Metals |
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| Abstract: | A study by means of JEM-2000 FX transmission microscope is carried out on ZTA ceramics in which A1_2O_3 is the major phase and ZrO_2 is the second phase for enhancing its toughness. It is found that matensite stripe forms on the ZrO_2/Al_2O_3 boundaries, grows very fast and terminates on Zr_2O_2/Al_2O_3 and ZrO_2/ZrO_2 boundaries, thin film surfaces, or the surface of other martensite inside grains. If electron beam is strengthened, the martensite stripe would penetrate ZrO_2/ZrO_2 baundary and cause martensitic transformation in the adjoining grains. It is also found that in ZrO_2 rich in yttrium, martensitic transformation is not likely to occur and that in some t-ZrO_2, martensitic transformation will not occur at all when it is bombarded by electron beam. |
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| Keywords: | Electron beam excitation Zirconia Martensite Phase transformation Transmission microscope |
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