| LI Zhang,TIAN Hao-liang,WANG Chang-liang,XIAO Chen-bing,JIN Guo,WANG Hao,WEI Shi-cheng.Effect of Explosive Spraying Process Parameters on Mechanical Properties of AlCuFeSc Quasicrystalline Coatings[J],52(9):439-450 |
| Effect of Explosive Spraying Process Parameters on Mechanical Properties of AlCuFeSc Quasicrystalline Coatings |
| Received:September 01, 2022 Revised:November 23, 2022 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2023.09.040 |
| KeyWord:explosive spraying quasicrystalline coating orthogonal test surface hardness bonding strength |
| Author | Institution |
| LI Zhang |
Aviation Key Laboratory of Science and Technology on advanced Corrosion and Protection for Aviation Material, AECC Beijing Institution of Aeronautical Materials, Beijing , China |
| TIAN Hao-liang |
Aviation Key Laboratory of Science and Technology on advanced Corrosion and Protection for Aviation Material, AECC Beijing Institution of Aeronautical Materials, Beijing , China |
| WANG Chang-liang |
Aviation Key Laboratory of Science and Technology on advanced Corrosion and Protection for Aviation Material, AECC Beijing Institution of Aeronautical Materials, Beijing , China |
| XIAO Chen-bing |
Aviation Key Laboratory of Science and Technology on advanced Corrosion and Protection for Aviation Material, AECC Beijing Institution of Aeronautical Materials, Beijing , China |
| JIN Guo |
College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin , China |
| WANG Hao |
College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin , China |
| WEI Shi-cheng |
National Key Laboratory for Remanufacturing, Academy of Army Armored Forces, Beijing , China |
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| Abstract: |
| Quasicrystals are solid-state ordered phases with both long-range quasi-periodic translational order and non-crystallographic rotational symmetry. They form specific metal alloys and are intermetallic compounds with a narrow composition range. The material exhibits unique rotational symmetry, low density, good thermal insulation performance, low friction coefficient and corrosion resistance, and it has good compatibility with Al/Ti alloy substrates. In recent years, the AlCuFeSc quasicrystalline protective coating has gradually become a popular high-performance protective coating material, which has broad applications and prospects in surface protection in complex environments. However, the currently reported quasicrystalline coating preparation technology is difficult to meet the application requirements of strong bonding and high hardness. Because the crystal state change of the coating during the preparation process is hard to be controlled, resulting in large internal stress and quasicrystalline phase content of the coating. Compared with other spraying methods, explosive spraying has the characteristics of fast particle flight speed, high density, strong bonding strength and uniform structure of the prepared coating. At the same time, it also has the advantage of easy adjustment of flame temperature and spraying rate, and can accurately control the coating. The layer preparation process preserves the quasicrystalline phase components in the powder to the greatest extent and ensures the quality of the coating. In order to study the effect of explosive spraying process parameters on the micro-structures and properties of AlCuFeSc quasicrystalline coatings, and further improve the performance of AlCuFeSc quasicrystalline coatings on aluminum alloy surfaces. In this paper, the quasicrystalline coating was prepared by the explosive spraying process, and three key parameters affecting the properties of the coating, such as the ratio of oxygen-fueled guns, spraying distance and spraying frequency, were optimized by orthogonal tests. The mechanical properties of the coatings were studied with a micro-hardness tester and a tensile testing machine. The microscopic phase structures of the powders and coatings were characterized with a scanning electron microscopy (SEM) and an X-ray diffraction (XRD). The research results showed that within the range of test parameters, the surface hardness and bonding strength of the coating were used as the main judging indicators, and the effect of each factor on the coating performance was in descending order of oxygen-fuel gun ratio, spraying distance, and spraying frequency. Comprehensively considering the two aspects of coating surface hardness and bonding strength, the optimal preparation process of the AlCuFeSc coating was 56% oxygen-fuel filling gun ratio, 210 mm spraying distance, and 1 time/s spraying frequency. The quasicrystalline coating prepared under the optimal process parameters was dense and well bonded to the aluminum alloy substrate. The surface hardness of the coating was 583.4HV0.3, the bonding strength was 63.24 MPa, the porosity was 0.648%, and the quasicrystalline phase content was 69%. The AlCuFeSc quasicrystalline coating prepared with the optimal process parameters has an excellent improvement in properties compared with the spray coating with the non-optimal process parameters, which would provide a reference for the application of quasicrystalline coatings in the future. |
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