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环境对MgB₂氧化过程中MgO晶须生长形状的影响

Influence of Environment on the Shape of MgO Whiskers Growing during the Oxidation Process of MgB₂

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【Author】 Lu Hongxia 1,2 , Yang Delin 1, Sun Hongwei 3, Li Guoxing 1, Hu Xing 1 ( 1School of Physical Engineering and Material Physics Laboratory, 2School of Materials Engineering, 3Institute of High-Temperature Materials, Zhengzhou University, 450052)

【机构】郑州大学物理工程学院材料物理实验室,郑州大学物理工程学院材料物理实验室,郑州大学高温材料研究所,郑州大学物理工程学院材料物理实验室,郑州大学物理工程学院材料物理实验室 450052；郑州大学材料工程系450002,450052,450052,450052,450052；

【摘要】用扫描电镜研究了在 Mg B2 氧化过程中环境对 Mg O晶须生长形状的影响。仅有 Mg B2 时 ,在 80 0℃左右空气气氛中 ,可生长出纳米尺寸的 Mg O晶须。若把 Mg B2 添加到氧化铝陶瓷基体中 ,则生长成竹节状晶须。Mg O晶须生长形状的差别可能是由于氧浓度以及位错等因素造成的。更多还原

【Abstract】 The influence of environment on the shape of MgO whiskers growing during the oxidation process of MgB 2 is studied by using scanning electron microscopy. If there are MgB 2 powders only, MgO whiskers with diameter in nanometer scale will appear at about 800℃ in air. If MgB 2 is added into Al 2O 3, then the MgO whiskers will have a shape of bamboo. This difference in shape of MgO whiskers may be caused by the difference in the concentration of oxygen and the existence of dislocation.更多还原