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Please use this identifier to cite or link to this item: http://hdl.handle.net/2080/1578

Title: Effect of Cr content on isothermal oxidation behaviour of nano – Y2O3 dispersed ferritic alloys prepared by mechanical alloying and hot isostatic pressing
Authors: Karak, S K
Keywords: Mechanical alloying
Hot isostatic pressing
isothermal oxidation
Activation engery
Issue Date: Dec-2011
Citation: International Conference on Advances in Materials and Materials Processing (ICAMMP-2011) during 9-11 December, 2011, Indian Institute of Technology Kharagpur
Abstract: The isothermal oxidation behaviour of 1.0 wt % nano-Y2O3 dispersed 83.0Fe-13.5Cr-2.0Al-0.5Ti (alloy A), 79.0Fe-17.5Cr-2.0Al-0.5Ti (alloy B),, 75.0Fe-21.5Cr-2.0Al-0.5Ti (alloy C), and 71.0Fe-25.5Cr-2.0Al-0.5Ti (alloy D) alloys (all in wt %) prepared by solid state mechanical alloying route and subsequent consolidation of the milled powder by hot isostatic pressing (HIP) at 1000 °C using 1.2 GPa uniaxial pressure for 1 h have been studied in dry air in the temperature range 700 – 900 ºC for 50 hrs. Evolution of microstructure and phase aggregate of oxide scale during isothermal oxidation were studied using scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction analysis. Gross weight-gain kinetics was parabolic in nature with respect to time, with an activation energy range 155-235 kJ/mol. The alloy D which contained 25.5 wt% Cr shows higher oxidation resistance than that of alloy A, alloy Band alloy C that contained in the range of 13.5 to 21.5 wt% Cr. Oxid...
Description: Copyright belongs to proceeding publisher
URI: http://hdl.handle.net/2080/1578
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