| DU San-ming,JIN Jun-jie,XIAO Hong-bin,ZHANG Yong-zhen.Preparation and Properties Analysis of Plasma Sprayed Nano Alumina Coatings[J],44(6):1-6,16 |
| Preparation and Properties Analysis of Plasma Sprayed Nano Alumina Coatings |
| Received:February 09, 2015 Revised:June 20, 2015 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2015.06.001 |
| KeyWord:plasma spraying nano-Al2 O3 coatings wear abrasion resistance |
| Author | Institution |
| DU San-ming |
1. School of Material Science and Engineering, Henan University of Science and Technology, Luoyang , China; 2. Key Laboratory for Material Tribology of Henan Province, Henan University of Science and Technology, Luoyang , China |
| JIN Jun-jie |
1. School of Material Science and Engineering, Henan University of Science and Technology, Luoyang , China; 2. Key Laboratory for Material Tribology of Henan Province, Henan University of Science and Technology, Luoyang , China |
| XIAO Hong-bin |
1. School of Material Science and Engineering, Henan University of Science and Technology, Luoyang , China; 2. Key Laboratory for Material Tribology of Henan Province, Henan University of Science and Technology, Luoyang , China |
| ZHANG Yong-zhen |
1. School of Material Science and Engineering, Henan University of Science and Technology, Luoyang , China; 2. Key Laboratory for Material Tribology of Henan Province, Henan University of Science and Technology, Luoyang , China |
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| Abstract: |
| Objective To study the microstructures, mechanical and tribological properties of Al2O3 micro-nano coatings. Methods Nanosized Al2O3 powders were deposited using atmospheric plasma spraying technique. Particle size distributed from 35 to 75 μm, consisted of nano-Al2O3, were obtained by spray drying. Micro-coatings of commercial Al2O3 feedstocks were also prepared as control. Microstructure of powders and coatings, as well as the worn surface of coatings, were characterized. Moreover, microstructure, mechanical and tribological behaviors of both nano and micro coatings were analyzed, respectively. Results Al2O3 nano-coatings showed a better interface bonding between the layers compared with Al2O3 micro coatings which resulted in great improvement of adhesion strength and microhardness of Al2O3 nano coatings. The friction coefficient of Al2O3 micro coating is 0. 41 while Al2O3 nano coating 0. 34 at the speed of 1000 r/ min and 750 g load. Conclusion Al2O3 nano coatings showed a better mechanical properties and wear resistance due to the excellent microstructure. |
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