About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
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Symposium
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Advanced Coatings for Wear and Corrosion Protection
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Presentation Title |
Tribological Resistance and Anti-corrosive Properties of Cr-based Electrochemical Nano-composite Coatings Reinforced with Yttria Stabilised Zirconia and Carbon Nanotubes |
Author(s) |
Pragya Tripathi, Prvan Kumar Katiyar, Janakarajan Ramkumar, Kantesh Balani |
On-Site Speaker (Planned) |
Pragya Tripathi |
Abstract Scope |
In the present work, chromium-based electrochemical coatings consisting of 3mol% yttria-stabilized zirconia nanoparticles (YSZ) and carbon nanotubes (CNT) as reinforcements were studied wear and corrosion performance. The results constitute maximum hardness of ~24 GPa, minimum scratch volume ~3.8×10-11 m3/Nm, coefficient of friction ~0.11, and highest corrosion resistance of ~3.9 KΩcm2 for Cr-YSZ-CNT. Enhanced corrosion and tribological resistance obtained through synergistic incorporation of YSZ and CNT are assigned to the presence of YSZ nanoparticles providing matrix strengthening, finer crystallite size ~15 nm, and inhibit CNT pull out. While, CNTs provide crack bridging, act as a solid lubricant, and pin the dislocations resulting in high dislocation density of the order ~ ×1015 m-2. Thus, the synergistic role of YSZ and CNT in hybrid coating (Cr-YSZ-CNT) makes it a suitable candidate coating material for protecting vital components exposed to wear conditions and corrosive media. |