Abstract
MoAlB ceramic coatings were prepared on a 316 steel surface by atmospheric plasma spraying with different arc power levels. The phase composition, microstructure and wear resistance of coatings against GCr15 and Si3N4 counterparts were studied. The MoAlB ceramic decomposed and was oxidized to form MoB and Al2O3 during plasma spraying. With the increase of the arc power, MoAlB experienced more decomposition, but the coatings became denser. When the arc power increased from 30 to 36 kW, the wear rates of coatings against GCr15 and Si3N4 balls reduced by 91% and 78%, respectively. The characterization of wear tracks shows that when against GCr15 counterparts, the main wear mechanisms are abrasive and adhesive wear, and when against Si3N4 counterparts, fatigue and abrasive wear are dominant. The refinement of wear resistance by increasing arc power can be attributed to the improvement of density and adhesive strength among splats.
Highlights
316 stainless steel (316L) has been broadly used in mechanical components for its excellent mechanical properties and cost effectiveness [1,2]
This is in the coatings rose with the arc power, which indicates that more MoAlB decomposed and suffered a rapid solidification during the deposition process good agreement with the results reported by Misra et al [40,41]
MoAlB coatings were deposited with different arc powers by APS technique
Summary
316 stainless steel (316L) has been broadly used in mechanical components for its excellent mechanical properties and cost effectiveness [1,2]. The wear failure of components, which leads to great economic losses, is the main mechanical failure mode during service. How to ameliorate the wear resistance of mechanical parts is an urgent problem. Ceramic coatings have been extensively studied as wearresistant layers, such as WC-WCoB, WC-Cr3 C2 -Ni, NiCrBSi-Zr and YSZ coatings [3,4,5,6], which greatly ameliorated the friction performance of the metallic part. The wear resistance of these coatings is severely challenged by adverse industrial conditions. Researchers need to explore coatings with excellent tribological performance
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
