Twin wire arc spray 공정을 통해 제작된 Al-Al2O3 복합소재미끄럼 방지 코팅의 우수한 마모 저항성 = A Novel Al-Al2O3 Non-Skid Composite Coating with Improved Wear Resistance Fabricated by Twin Wire Arc Spraying

다국어 초록 (Multilingual Abstract)

In this study, novel non-skid Al-Al2O3 coatings with improved wear resistance were fabricatedusing twin wire arc spray (TWAS). TWAS Al coating was prepared as a reference sample and representativeTWAS parameters (working distance, process gas pressure, arc current) were controlled to fabricate differentAl-Al2O3 coatings. The Al-Al2O3 coatings showed a superior static coefficient of friction and higher surfaceroughness than the Al coating. The microstructural analysis of the Al-Al2O3 coatings revealed that thecoatings contained Al splats, partially-melted Al2O3 particles, fully-melted Al2O3 splats and pores. The porosityand Al2O3 content of the Al-Al2O3 coatings varied with different process parameters. The Vickers hardnessof 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. Theweight loss of the Al-Al2O3 coatings were only 4.8 ~ 17.0 % of the Al coating, indicating that the wearresistance of the TWAS Al-Al2O3 coatings was superior. The TWAS coatings showed a complex wearmechanism, such as splat wear and abrasive wear. The distributed Al2O3 particles in Al-Al2O3 coatingsuccessfully suppressed the abrasive wear of the Al matrix, which contributed to the enhanced wearresistance. The results in this study indicated that the Al-Al2O3 composite coating has potential use as a novelnon-skid coating.