| 等离子熔凝Al2O3/GdAlO3共晶陶瓷的制备与组织 |
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| 引用本文： | 孙帅,徐强,朱时珍,刘颖. 等离子熔凝Al2O3/GdAlO3共晶陶瓷的制备与组织[J]. 稀有金属材料与工程, 2011, 0(Z1): 619-622 |
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| 作者姓名： | 孙帅 徐强 朱时珍 刘颖 |
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| 作者单位： | 北京理工大学 |
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| 基金项目： | 国家自然科学基金(50702008) |
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| 摘 要： | 以77mol%Al2O3和23mol%Gd2O3的共晶配比混粉,以高温等离子为热源,加热粉体使其熔融,随后以空冷和水冷的不同冷却方式实现凝固,得到不同的冷凝试样。采用X射线衍射仪和场发射扫描电镜对试样的相组成和微观形貌进行表征。结果表明,采用不同冷却工艺制备的熔凝试样均具有部分连续的Al2O3/GdAlO3共晶组织,组织致密,相界面结合良好,没有气孔和杂质;与空冷试样相比,水淬试样组织得到细化,共晶间距达到0.2μm左右。
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| 关 键 词： | 共晶陶瓷 等离子熔凝 Al2O3 GdAlO3 组织 |
Preparation and Microstructure of Al2O3/GdAlO3 Eutectic Ceramic by Plasma Melting |
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| Sun Shuai, Xu Qiang, Zu Shizhen, Liu Ying. Preparation and Microstructure of Al2O3/GdAlO3 Eutectic Ceramic by Plasma Melting[J]. Rare Metal Materials and Engineering, 2011, 0(Z1): 619-622 |
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| Authors: | Sun Shuai Xu Qiang Zu Shizhen Liu Ying |
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| Affiliation: | (Beijing Institute of Technology, Beijing 100081, China) |
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| Abstract: | According to the eutectic percentage, the sample that was rapidly melted at high temperature by the plasma technology was prepared with 77mol% Al2O3 and 23mol% Gd2O3. The samples were cooled in two different ways i.e. air cooling and water quenching. Phases and microstructures of the investigated sample were examined by X-ray diffraction and field-emission scanning electrical microscopy. The results show that Al2O3/GdAlO3 eutectic ceramics are both obtained by plasma rapid melting, though cooled in different ways. Their microstructures that both consist of two partially continuous phases are free of pores and impurities. Compared with the air cooled sample, finer eutectic microstructure whose spacing is approximately 0.2 μm is gained by the water quenching method. |
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| Keywords: | eutectic ceramic plasma melting Al2O3 GdAlO3 microstructure |
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