|
Vol.62, No.4, 257 ~ 267, 2024
|
| Title |
| A Novel Al-Al2O3 Non-Skid Composite Coating with Improved Wear Resistance Fabricated by Twin Wire Arc Spraying |
| 권한솔 Hansol Kwon , 박영진 Youngjin Park , 강용진 Yongjin Kang , 김도현 Dohyun Kim , 남욱희 Uk Hee Nam , 변응선 Eungsun Byon |
|
|
|
| Abstract |
| In this study, novel non-skid Al-Al2O3 coatings with improved wear resistance were fabricated using twin wire arc spray (TWAS). TWAS Al coating was prepared as a reference sample and representative TWAS parameters (working distance, process gas pressure, arc current) were controlled to fabricate different Al-Al2O3 coatings. The Al-Al2O3 coatings showed a superior static coefficient of friction and higher surface roughness than the Al coating. The microstructural analysis of the Al-Al2O3 coatings revealed that the coatings contained Al splats, partially-melted Al2O3 particles, fully-melted Al2O3 splats and pores. The porosity and Al2O3 content of the Al-Al2O3 coatings varied with different process parameters. The Vickers hardness of the Al matrix showed a similar value in all samples, which means the deposition phenomena was the same. Ball-on-disc wear test with a Si3N4 ball was used to evaluate the wear resistance of the TWAS coatings. The weight loss of the Al-Al2O3 coatings were only 4.8 ~ 17.0 % of the Al coating, indicating that the wear resistance of the TWAS Al-Al2O3 coatings was superior. The TWAS coatings showed a complex wear mechanism, such as splat wear and abrasive wear. The distributed Al2O3 particles in Al-Al2O3 coating successfully suppressed the abrasive wear of the Al matrix, which contributed to the enhanced wear resistance. The results in this study indicated that the Al-Al2O3 composite coating has potential use as a novel non-skid coating.
(Received 15 November, 2023; Accepted 19 January, 2024) |
|
|
| Key Words |
| Twin wire arc spray, TWAS, Non-skid coating, Composite coating, Process optimization, Ball-on-disc test |
|
|
 |
|
