石墨表面熔盐电镀制备铝金属层

曹瑞雄; 陶则超; 王宏宝; 郭全贵

石墨表面熔盐电镀制备铝金属层

1.
中国科学院山西煤炭化学研究所, 山西太原 030001;
2.
中国科学院大学, 北京 100049

基金项目: 国家自然科学基金(51303198);中科院山西煤化所青年人才基金(2011SQNRC11).

详细信息

通讯作者:
郭全贵,研究员. E-mail:qgguo@sxicc.ac.cn

中图分类号: TQ153
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- 被引次数: 0
出版历程
- 收稿日期: 2015-02-20
- 录用日期: 2015-09-07
- 修回日期: 2015-06-01
- 刊出日期: 2015-06-28

Electrodeposition of an aluminum coating on a graphite surface from a molten AlCl₃-NaCl-KCl mixture

1.
Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds: National Natural Science Foundation of China(51303198);Young Scientist of SXICC(2011SQNRC11).

摘要

摘要: 采用AlCl₃-NaCl-KCl混合熔盐(质量比8:1:1)在石墨表面电镀得到铝金属镀层/石墨复合材料。通过调节电流密度和电镀时间可实现对铝金属镀层厚度和表面形貌的控制。在相同电流密度(1.06 A/dm²)下,电镀时间在240 min以内时,电镀时间越长,镀层越厚(最大厚度140 μm),但电镀时间达到300 min时,铝金属镀层表面出现枝状结构;电流密度越大铝金属沉积速率越快,在相同电镀时间(120 min)时,电流密度达到3.28 A/dm²,得到铝镀层最厚(148 μm)。铝金属镀层与石墨基体间的附着强度较高,铝金属层可提高复合材料的热导率,热导率从最初的115.7 W/(m·K)提高至199.0 W/(m·K)。
- 电镀 /
- 熔盐 /
- 石墨 /
- 铝 /
- 结合性能 /
- 热导率
Abstract: An electrochemical method was used to deposit aluminum on a graphite plate in a molten NaCl-KCl-AlCl₃ mixture with a weight ratio of 1:1:8 to form a coatings with different thicknesses. The thickness and morphology of the coating were controlled by the current density and electrochemical deposition time. Results indicated that the thickness of the coating increased with deposition time up to 240 min at a current density of 1.06 A/dm² and a dendritic structure coating was formed by increasing the deposition time beyond 300 min. The greater the current density, the faster the deposition rate. When the current density was increased to 3.28 A/dm², the thickness of the coating reached a maximum of 148 μm for an electrochemical deposition time of 120 min. Excellent adhesion strength between the aluminum coating and graphite substrate was proved by thermal shock resistance and scratch hardness tests. The thermal conductivity of the samples was increased significantly from an initial value of 115.7 to 199.0 W/(m·K).
- Electrochemical deposition /
- Molten salt /
- Graphite /
- Aluminum /
- Adhesion stress /
- Thermal conductivity

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