Study on the Microstructure and Wear Resistance of Flame Sprayed High Entropy Alloy Reinforced Copper - Based Composite Coatings
In order to study the effect of AlCoCrFeNi high entropy alloy (HEA) on the morphology, microhardness and wear resistance of copper - based composite coatings, the AlCoCrFeNi / Cu composite coatings were prepared on the surface of 40Cr steel by flame spraying. The microstructure and wear resistance o...
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Materials Protection
2021-05-01
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| Series: | Cailiao Baohu |
| Subjects: | |
| Online Access: | http://www.mat-pro.com/fileup/1001-1560/PDF/20210504.pdf |
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| Summary: | In order to study the effect of AlCoCrFeNi high entropy alloy (HEA) on the morphology, microhardness and wear resistance of copper - based composite coatings, the AlCoCrFeNi / Cu composite coatings were prepared on the surface of 40Cr steel by flame spraying. The microstructure and wear resistance of coatings were analyzed by X - ray diffraction, microhardness tester, scanning electron microscope and high - speed friction wear testing machine. Results showed that the phase structure of high entropy alloy (HEA) was composed of BCC and FCC two - phase solid solution, and the morphology of AlCoCrFeNi/Cu composite coating was lamellar. With the increase of the content of high entropy alloy, the microhardness of the composite coating increased. When AlCoCrFeNi high entropy alloy reached the maximum of 40%, the microhardness of the composite coating increased to the maximum of 490.8 HV, and the wear rate decreased to the minimum of 1.06 mg, which was 94.9% lower than that without high entropy alloy(HEA) addition. Besides, the friction coefficient increased with the increase of high entropy alloy content. |
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| ISSN: | 1001-1560 |