| 放电等离子烧结原位制备LaB6多晶纳米块体阴极材料 |
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| 引用本文： | 周身林,刘丹敏,张久兴,金 帅.放电等离子烧结原位制备LaB6多晶纳米块体阴极材料[J].稀有金属材料与工程,2009,38(2):313-317. |
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| 作者姓名： | 周身林 刘丹敏 张久兴 金 帅 |
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| 作者单位： | 北京工业大学新型功能材料教育部重点实验室,北京,100022 |
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| 基金项目： | 教育部创新工程重大项目培育资金项目 |
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| 摘 要： | 用氢直流电弧法制备La-LaH2纳米粉末,再采用放电等离子烧结技术,在原位、"无氧"条件下成功制备高纯LaB6多晶纳米块体热阴极材料,并系统研究放电等离子烧结温度、压强对材料物相、结构和性能的影响.结果表明,材料中形成单相的LaB6,纯度达到99.867%,平均晶粒尺寸为120 nm,LaB6纳米块体相对密度达到99.2%,维氏硬度达到17.4 GPa,抗弯强度高达245.6 MPa,己达单晶材料的理论抗弯强度值.
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| 关 键 词： | 放电等离子烧结 多晶LaB6 纳米块体 热阴极 |
| 收稿时间： | 2008/1/24 0:00:00 |
Nanostructured Bulk Polycrystal LaB6 Cathode Prepared by in-Situ Spark Plasma Sintering |
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| Zhou Shenlin,Liu Danmin,Zhang Jiuxin and Jin Shuai.Nanostructured Bulk Polycrystal LaB6 Cathode Prepared by in-Situ Spark Plasma Sintering[J].Rare Metal Materials and Engineering,2009,38(2):313-317. |
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| Authors: | Zhou Shenlin Liu Danmin Zhang Jiuxin and Jin Shuai |
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| Affiliation: | The Key Laboratory of Advanced Functional Materials;Ministry of Education;Beijing University of Technology;Beijing 100022;China |
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| Abstract: | In order to obtain LaB6 cathode with high-purity and excellent properties,La and LaH2 nanopowders were prepared by hydrogen arc plasma method, and then La-LaH2 and B nanopowders were sintered to fabricate the high-purity LaB6 polycrystal nano-bulk cathode by in situ SPS (Spark Plasma Sintering) in a oxygen free system. The effects of sintering temperature and pressure on the phases, microstructure and properties of the nano-bulk were systematically studied. The results show that the single-phase LaB6 was fo... |
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| Keywords: | spark plasma sintering (SPS) LaB6 polycrystal nanostructure bulk hot cathode |
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