纳米Al<sub>2</sub>O<sub>3</sub>晶须与镁基体间的电势差对镁基复合材料分散性的影响

钱晓英; 杨鸿; 胡春峰; 曾迎; 黄原定; 尚欣; 万杨杰; 蒋斌; 冯庆国

doi:10.1007/s12613-022-2550-0

Volume 30 Issue 1

Jan. 2023

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文章导航 > 矿物冶金与材料学报（英文） > 2023 > 30(1): 104-111

Xiaoying Qian, Hong Yang, Chunfeng Hu, Ying Zeng, Yuanding Huang, Xin Shang, Yangjie Wan, Bin Jiang, and Qingguo Feng, Effect of potential difference between nano-Al₂O₃ whisker and Mg matrix on the dispersion of Mg composites, Int. J. Miner. Metall. Mater., 30(2023), No. 1, pp. 104-111. https://doi.org/10.1007/s12613-022-2550-0

Cite this article as:

Xiaoying Qian, Hong Yang, Chunfeng Hu, Ying Zeng, Yuanding Huang, Xin Shang, Yangjie Wan, Bin Jiang, and Qingguo Feng, Effect of potential difference between nano-Al2O3 whisker and Mg matrix on the dispersion of Mg composites, Int. J. Miner. Metall. Mater., 30(2023), No. 1, pp. 104-111. https://doi.org/10.1007/s12613-022-2550-0

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研究论文

纳米Al₂O₃晶须与镁基体间的电势差对镁基复合材料分散性的影响

1)
重庆大学材料科学与工程学院，重庆 400044，中国
2)
重庆大学国家镁合金工程技术研究中心，重庆 400044，中国
3)
西南交通大学材料科学与工程学院，成都 610031，中国
4)
Institute of Metallic Biomaterials, Helmholtz-Zentrum Hereon, Max-Planck-Str. 1, D-21502 Geesthacht, Germany
5)
东莞科技大学机械工程学院，东莞 523808，中国

通讯作者:
杨鸿    E-mail: hong.yang@cqu.edu.cn

蒋斌    E-mail: jiangbinrong@cqu.edu.cn

冯庆国    E-mail: qfeng@swjtu.edu.cn

文章亮点

(1) 系统研究了电势差法中溶剂类型和表面修饰剂含量对Al₂O₃晶须增强镁基复合粉末分散性的影响。

(2) 结合第一性原理计算说明了表面修饰剂对Al₂O₃晶须与镁基间粘结强度的影响。

(3) 通过电势差法和粉末冶金成功制备晶粒细化，硬度离散程度低的Al₂O₃晶须增强镁基复合材料。

中文摘要

镁基复合材料具有较高的强度而受到广泛关注，但增强体的分散性仍是亟需解决的问题之一。本文旨在利用正负离子的电位差来改善纳米Al₂O₃晶须在Mg基复合材料中的均匀分散性。用十二烷基苯磺酸钠(C₁₈H₂₉NaO₃S，SDBS)修饰Mg粉末，并将其表面引入阴极基团。用十六烷基三甲基溴化铵(C₁₉H₄₂BrN，CTAB)对Al₂O₃晶须进行了改性，在其表面引入阳极基团。研究了CTAB和SDBS的含量、使用氛围和溶剂类型对分散性的影响。结果表明，与常规球磨相比，在镁粉中添加2wt% SDBS和在Al₂O₃晶须中添加2wt% CTAB可促进均匀复合粉末的形成。与此同时，第一性原理计算结果也表明，Al₂O₃晶须增强剂与Mg基体之间的粘聚力比未修饰复合粉体更强。随后，采用粉末冶金法制备复合材料后，对复合材料的形貌、晶粒尺寸、硬度和标准差系数进行了分析，以评价复合材料的分散效率。结果表明，经均匀分散的Al₂O₃晶须改性后，复合材料的晶粒尺寸和硬度分别比纯Mg提高了26%和20%，硬度标准差系数比球磨试样降低了32.5%。

关键词:

Research Article

Effect of potential difference between nano-Al₂O₃ whisker and Mg matrix on the dispersion of Mg composites

+ Author Affiliations

1)
National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China
2)
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
3)
Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Material Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
4)
Institute of Metallic Biomaterials, Helmholtz-Zentrum Hereon, Max-Planck-Str. 1, D-21502 Geesthacht, Germany
5)
School of Mechanical Engineering, Dongguan University of Technology, Dongguan 523808, China

Corresponding authors:
Hong Yang    E-mail: hong.yang@cqu.edu.cn

Bin Jiang    E-mail: jiangbinrong@cqu.edu.cn

Qingguo Feng    E-mail: qfeng@swjtu.edu.cn
Received: 4 July 2022; Revised: 22 August 2022; Accepted: 9 September 2022; Available online: 10 September 2022

Abstract

Abstract

The potential difference between positive and negative ions was utilized to improve the homogenized dispersion of nanoscale Al₂O₃ whiskers in Mg matrix composites. The Mg powders were decorated with sodium dodecylbenzene sulfonate (C₁₈H₂₉NaO₃S, SDBS) and were introduced to the cathode group on their surface. The Al₂O₃ whiskers were modified by the cetyl trimethyl ammonium bromide (C₁₉H₄₂BrN, CTAB) and were featured in the anode group. The suitable contents of CTAB and SDBS, the application atmosphere, and the type of solvents were investigated. Dispersion results showed that adding 2wt% SDBS into Mg powders and adding 2wt% CTAB into Al₂O₃ whiskers promoted the formation of more uniformly mixed composite powders, compared to those of conventional ball milling via scanning electron microscopy (SEM) analysis. Meanwhile, the calculated results derived from first-principle calculations also demonstrated the stronger cohesion between Al₂O₃ whisker reinforcements and Mg matrix than undecorated composite powders. After preparation by powder metallurgy, the morphology, grain size, hardness, and standard deviation coefficient of composites were analyzed to evaluate the dispersed efficiency. The results indicated that the modification of homogenized dispersed Al₂O₃ whiskers in composites contributed to the refinement of 26% in grain size and the improvement of 20% in hardness compared with pure Mg, and the reduction of 32.5% in the standard deviation coefficient of hardness compared with the ball-milling sample.
- magnesium-based composites;
- Al₂O₃ whiskers;
- potential difference;
- dispersion

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纳米Al₂O₃晶须与镁基体间的电势差对镁基复合材料分散性的影响

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Effect of potential difference between nano-Al₂O₃ whisker and Mg matrix on the dispersion of Mg composites

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纳米Al2O3晶须与镁基体间的电势差对镁基复合材料分散性的影响

文章亮点

中文摘要

Effect of potential difference between nano-Al2O3 whisker and Mg matrix on the dispersion of Mg composites

Abstract

References

数据统计

Catalog

纳米Al₂O₃晶须与镁基体间的电势差对镁基复合材料分散性的影响

Effect of potential difference between nano-Al₂O₃ whisker and Mg matrix on the dispersion of Mg composites