Dry Sliding Wear Behavior of Cr-Al-N Diffusion Coatings against Silicon Nitride

• Published in: Journal of materials engineering and performance Vol. 30; no. 3; pp. 2113 - 2123
• Main Authors: Kılınç, Bülent, Kocaman, Engin, Şen, Şaduman, Şen, Uğur
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.03.2021
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Corrosion and Coatings; Engineering Design; Materials Science; Quality Control; Reliability; Safety and Risk; Tribology; steel; profilometry; diffusion treatments; coating; sliding wear
• ISSN: 1059-9495; 1544-1024
• DOI: 10.1007/s11665-021-05498-6

In this study, the friction and wear behavior of uncoated and chromium aluminum nitride (Cr-Al-N)-coated AISI D2 tool steel disks were studied using a ball-on-disk system. Thermo-reactive diffusion technique was utilized to the coat desired phases onto pre-nitrided AISI D2 steel. The morphology and the phases formed on the coating layer were characterized by optical and scanning electron microscopy along with x-ray diffraction analysis. Friction and wear tests were conducted under atmospheric conditions with 2.5, 5 and 10 N loads at 0.1, 0.3 and 0.5 m/s sliding speeds against a silicon nitride ball. A dense and homogeneous coating layer with the thickness and hardness of 11.8 ± 1.3 µm and 2067 ± 160 HV 0.01 was obtained. The results revealed that the friction coefficient values varied between 0.6-0.942 and 0.025-0.479 for uncoated and Cr-Al-N-coated AISI D2 steels, respectively. The wear rate of the uncoated and Cr-Al-N-coated AISI D2 steel fluctuated in the range of 5.01 × 10 −4 -3.47 × 10 −3 mm 3 /m and 9.38 × 10 −5 -9.31 × 10 −4 mm 3 /m, respectively. The wear rate of the Cr-Al-N coating was much lower than that of the AISI D2 steel.