|About this Abstract
||Materials Science & Technology 2012
||Coatings for Corrosion and Wear Resistance Applications
||A Study on the Oxidation Behavior of HVOF-Sprayed Cr3C2-NiCr Coating on 310L Stainless Steel at Elevated Temperatures
||V.N. Shukla, R. Jayaganthan, V. K. Tewari
|On-Site Speaker (Planned)
The high temperature oxidation behavior of HVOF sprayed Cr<SUB>3</SUB>C<SUB>2</SUB>–NiCr coatings on 310L stainless steel has been studied. Oxidation kinetics of the coated specimen in air at high temperatures (800 <SUP>0</SUP>C and 900 <SUP>0</SUP>C) under cyclic conditions was investigated using thermo-gravimetric technique. XRD, FE-SEM/EDS techniques were used to analyse the scales formed on the surface of the oxidised samples. It was observed that the coated specimen obey a parabolic rate law of oxidation at all elevated temperatures. High volume fraction of carbides contributed for the higher microhardness of the coating (640-1014HV). The coated specimen showed negligible microspalling of the scales. The scale remained intact and adherent due to its good compatibility and similar thermal expansion coefficient between coating and the 310L SS substrate. The development of continuous and protective oxides of chromium, nickel and spinel of nickel and chromium might have contributed for the better oxidation resistance at elevated temperatures.
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