Enhanced in-situ reinforcement evolution and superior wear resistance by changing Y2O3 addition in Ti6Al4V-based WC gradient coatings through laser cladding
Shuo Fu , Yaxin Xu , Lijuan Zhu , Haifei Lu , Wenya Li
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Abstract
A Y2O3-modified wear-resistant coating with a gradient structure of the WC content was produced by laser cladding on a Ti6Al4V matrix. Different Y2O3 contents (0 vol%, 1.5 vol%, 3 vol% and 4.5 vol%) were employed to investigate the effect of Y2O3 content on the microstructure morphology and tribological properties of Ti6Al4V-base WC gradient coatings. Results indicate that the coating containing 3 vol% Y2O3 exhibited the most significant improvement in both microstructure refinement and tribological properties, resulting in 2.58 times increase in wear resistance compared to 0 vol% Y2O3 addition and 42.6 times increase compared to the Ti6Al4V matrix. This work provides a preparation method for super wear-resistant coatings and reveals the internal strengthening mechanism of the coatings.
期刊介绍：
Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International.
Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.
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