Mechanical and tribological properties of nano/micro composite alumina coatings fabricated by atmospheric plasma spraying | |
Department | 先进润滑与防护材料研究发展中心 |
An YL(安宇龙)1; Li SJ(李双建)1,2; Hou GL(侯国梁)1; Zhao XQ(赵晓琴)1; Zhou HD(周惠娣)1; Chen JM(陈建敏)1; Hou GL(侯国梁); Zhao XQ(赵晓琴) | |
The second department | 固体润滑国家重点实验室 |
2017 | |
Source Publication | Ceramics International |
ISSN | 0272-8842 |
Volume | 43Issue:6Pages:5319-5328 |
Abstract | Adding nano particles can significantly improve the mechanical properties and wear resistance of thermal sprayed Al2O3 coating. However, it still remains a challenge to uniformly incorporate nano particles into traditional coatings due to their bad dispersibility. In the present work, nanometer Al2O3 (n-Al2O3) powders modified by KH-560 silane coupling agent were introduced into micrometer Al2O3 (m-Al2O3) powders by ultrasonic dispersion to afford nano/micro composite feedstock, and then four resultant coatings (weight fraction of n-Al2O3: 0%, 3%, 5% and 10%) were fabricated by atmospheric plasma spraying. The features and constitutes of feedstock and as-sprayed coatings, as well as their porosity, bonding strength, microhardness and frictional behaviors were investigated in detail. Results show that the nano/micro composite feedstock with uniform microstructure can be better melted in the spraying process, thereby obtaining coatings with denser microstructure, higher hardness and bonding strength. Added n-Al2O3 has no obvious effect on the friction coefficient of composite coatings, whereas can improve their wear-resistant and reduce the worn degree of counterpart. The wear mechanism of traditional coating is brittle fracture and lamellar peeling, while that of composite coating with weight fraction of n-Al2O3 of 10% is adhesive wear. |
Keyword | Nano Alumina Atmosphere Plasma Spraying Microstructure Mechanical Properties Friction And Wear Behavior |
Subject Area | 材料科学与物理化学 |
DOI | 10.1016/j.ceramint.2017.01.072 |
Funding Organization | National Natural Science Foundation of China (Grant Nos. 51302272;51601203);Youth Innovation Promotion Association of the Chinese Academy of Sciences (Grant No. 2014378);West Light Foundation of the Chinese Academy of Sciences |
Indexed By | SCI |
If | 2.986 |
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/362003/21639 |
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 | Hou GL(侯国梁); Zhao XQ(赵晓琴) |
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 | An YL,Li SJ,Hou GL,et al. Mechanical and tribological properties of nano/micro composite alumina coatings fabricated by atmospheric plasma spraying[J]. Ceramics International,2017,43(6):5319-5328. |
APA | An YL.,Li SJ.,Hou GL.,Zhao XQ.,Zhou HD.,...&赵晓琴.(2017).Mechanical and tribological properties of nano/micro composite alumina coatings fabricated by atmospheric plasma spraying.Ceramics International,43(6),5319-5328. |
MLA | An YL,et al."Mechanical and tribological properties of nano/micro composite alumina coatings fabricated by atmospheric plasma spraying".Ceramics International 43.6(2017):5319-5328. |
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