| JI Zhao-hui,ZHANG Shuai,MA Xiang,DING Kun-ying,CHENG Tao-tao.Phase Structure Characterization and High-speed Scraping Behavior Analysis of Abrasable Coatings Based on Multifractal[J],49(2):165-171 |
| Phase Structure Characterization and High-speed Scraping Behavior Analysis of Abrasable Coatings Based on Multifractal |
| Received:August 03, 2019 Revised:February 20, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2020.02.020 |
| KeyWord:aluminum silicon polyphenyl ester sealing coating multifractal spectrum friction coefficient high speed scraping scraping force |
| Author | Institution |
| JI Zhao-hui |
1.Tianjin Key Laboratory for Civil Aircraft Airworthiness and Maintenance, Civil Aviation University of China, Tianjin , China |
| ZHANG Shuai |
1.Tianjin Key Laboratory for Civil Aircraft Airworthiness and Maintenance, Civil Aviation University of China, Tianjin , China |
| MA Xiang |
2.Ameco, Beijing , China |
| DING Kun-ying |
1.Tianjin Key Laboratory for Civil Aircraft Airworthiness and Maintenance, Civil Aviation University of China, Tianjin , China |
| CHENG Tao-tao |
1.Tianjin Key Laboratory for Civil Aircraft Airworthiness and Maintenance, Civil Aviation University of China, Tianjin , China |
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| Abstract: |
| The work aims to study the relationship between the polystyrene phase distribution of low-temperature seal coatings in AlSi-PHB (aluminum-silicon polyphenylene ester) with different structures and the coating scraping force under high-speed scraping conditions. Three AlSi-PHB seal coatings with different structures were prepared by atmospheric plasma spraying method. The metallographic photographs of the cross-section of the coating were measured by scanning electron microscopy and laser confocal equipment. The multi-fractal spectrum of polystyrene phase distribution after characterization was obtained by Matlab software. The friction coefficient was measured by a UMT-2 micro-friction wear tester. The scraping force of the coating under a given high speed scraping condition was measured by a high speed rotor test bench and the friction and wear mechanism of the coating was analyzed. The multifractal spectrum could quantitatively characterize the distribution of polyphenyl ester phase and the proportion of particles in size. The friction coefficients of the three friction pairs were 0.64, 0.56 and 0.55, respectively. The scraping forces during high speed scraping were 104, 154 and 90 N, respectively. The friction and wear mechanisms of micro-cutting and adhesive wear occurred in all three coatings. In the case of similar content of polyphenylene ester phase, the average friction coefficient is related to polyphenyl ester phase content, distribution uniformity and proportion of particle size: the more polyphenyl ester content, the smaller the average friction coefficient. When the content is similar, the distribution of the polyphenyl ester phase is more uniform, the particles become finer, and the friction coefficient is smaller. At the same time, the uniformity of the distribution of polyphenyl ester phase will affect the scraping force during high-speed scraping. The more uniform distribution of polyphenyl ester phase can lead to higher bonding strength of the coating and greater scraping force, so the coating will be less likely to fall off. |
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