Microstructure and Properties of Aluminum Alloy-Ceramic Gradient Materials by Laser Deposition

被引：0

作者：

He B. ^{[1
]}

Lei T. ^{[1
]}

Zhuang J. ^{[1
]}

Sun C. ^{[2
]}

Yang G. ^{[3
]}

机构：

[1] School of Mechatronics Engineering, Shenyang Aerospace University, Shenyang

[2] Mechanical College, Shenyang Institute of Engineering, Shenyang

[3] Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process, Shenyang Aerospace University, Shenyang

来源：

Xiyou Jinshu/Chinese Journal of Rare Metals | 2019年 / 43卷 / 04期

关键词：

Aluminum alloy; Ceramic; Gradient material; Microstructure; Wear resistance;

D O I：

10.13373/j.cnki.cjrm.XY18030013

中图分类号：

学科分类号：

摘要：

In order to improve the hardness and wear resistance of aluminum alloy, an aluminum alloy-ceramic gradient composite coating was prepared by laser deposition manufacturing technology. The microstructure of the gradient material was observed. The microhardness and friction wear properties of the gradient material were tested. The wear mechanism and strengthening mechanism of the gradient material were also analyzed. The results showed that the substrate and the gradient layer were well bonded and crack-free, and that the microstructure of the gradient material layer was more fine and uniform than that of the aluminum alloy substrate. The more the ceramic content was, the finer the grains were. The hardness of the material showed an upward trend from the substrate to 12% ceramic content, the hardness of the substrate was about HV 80, the hardness of the material layer was up to HV 170. With the increase of ceramic content, the abrasion resistance would be enhanced, the coefficient of friction of 12% ceramic layer was the smallest and its wear mass loss was minimal and was only 4.2 mg. The main reasons for the increase of microhardness and wear resistance of the gradient layer were the enhanced dispersion of ceramic particles and the grain-fining and strengthening of laser deposited microstructure. © Editorial Office of Chinese Journal of Rare Metals. All right reserved.

引用

页码：375 / 381

页数：6

共 18 条

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