Improving interfacial, mechanical and tribological properties of alumina coatings on Al alloy by plasma arc heat-treatment of substrate | |
Department | 先进润滑与防护材料研究发展中心 |
Hou GL(侯国梁)1; An YL(安宇龙)1; Zhao XQ(赵晓琴)1; Zhou HD(周惠娣)1; Chen JM(陈建敏)1; Li SJ(李双建)1,2; Liu X(刘侠)1,2; Deng W(邓雯)1,2; An YL(安宇龙); Chen JM(陈建敏) | |
The second department | 固体润滑国家重点实验室 |
2017 | |
Source Publication | Applied Surface Science |
ISSN | 0169-4332 |
Volume | 411Pages:53-66 |
Abstract | Plasma sprayed ceramic coatings can be used to improve the mechanical properties and wear resistance of aluminum alloys, but there are still some challenges to effectively increase their interfacial adhesion. Thus we conducted plasma arc-heat treatment (PA-HT) of Al alloy substrate before plasma spraying, hoping to tune the microstructure of Al2O3 coatings and improve their interfacial strength as well as mechanical and tribological properties. The influences of PA-HT on the microstructure of alumina coatings were analyzed by X-ray diffraction, transmission electron microscopy and scanning electron microscopy, while its effect on mechanical and tribological properties were evaluated by a nano-indentation tester and a friction and wear tester. Results demonstrate that a few columnar δ-Al2O3 generated on substrate surface after PA-HT at 200–250 °C can induce the epitaxial growth of γ-Al2O3 grains in Al2O3 coatings, thereby enhancing their interfacial bonding. Besides, elevating substrate temperature can help alumina droplets to melt into the interior of substrate and eliminate holes at the interface, finally increasing the interfacial anchorage force. More importantly, no interfacial holes can allow the heat of droplets to be rapidly transmitted to substrate, which is beneficial to yield smaller crystals in coatings and greatly enhance their strength, hardness and wear resistance. |
Keyword | Al Alloy Ceramic Coating Epitaxial Growth Interfacial Properties Mechanical Properties Wear Resistance |
Subject Area | 材料科学与物理化学 |
DOI | 10.1016/j.apsusc.2017.03.170 |
Funding Organization | National Natural Science Foundation of China (Grant Nos. 51441005;51302272);West Light Foundation of the Chinese Academy of Sciences;Youth Innovation Promotion Association of the Chinese Academy of Sciences (Grant No. 2014378) |
Indexed By | SCI |
If | 3.387 |
Language | 英语 |
Funding Project | 磨损与表面工程研究组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/21871 |
Collection | 中国科学院材料磨损与防护重点实验室/先进润滑与防护材料研究发展中心 固体润滑国家重点实验室(LSL) |
Corresponding Author | An YL(安宇龙); Chen JM(陈建敏) |
Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
Recommended Citation GB/T 7714 | Hou GL,An YL,Zhao XQ,et al. Improving interfacial, mechanical and tribological properties of alumina coatings on Al alloy by plasma arc heat-treatment of substrate[J]. Applied Surface Science,2017,411:53-66. |
APA | Hou GL.,An YL.,Zhao XQ.,Zhou HD.,Chen JM.,...&陈建敏.(2017).Improving interfacial, mechanical and tribological properties of alumina coatings on Al alloy by plasma arc heat-treatment of substrate.Applied Surface Science,411,53-66. |
MLA | Hou GL,et al."Improving interfacial, mechanical and tribological properties of alumina coatings on Al alloy by plasma arc heat-treatment of substrate".Applied Surface Science 411(2017):53-66. |
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