|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Materials for High Temperature Applications: Next Generation Superalloys and Beyond
||Oxidation Behavior of Silicide Coatings Produced by Molten Salt Technique on the Nb-1Zr-0.1C Alloy
||Megha Tyagi, Vishwanadh B, S. K. Ghosh, Raghvendra Tewari
|On-Site Speaker (Planned)
In this study molten salt technique has been used to produce silicide coating on the Nb-1Zr-0.1C alloy using NaCl–KCl–NaF–Na2SiF6–Si melt. Microstructural characterization of the coated samples were carried out using scanning electron microscopy (SEM) and X-ray diffraction (XRD) . SEM of the cross section samples showed the formation of 12μm thick NbSi2 layer on the substrate. Also, XRD pattern obtained revealed the presence of NbSi2 as a major phase. Isothermal weight gain experiments were carried out on bare Nb and coated sample at 1273 K to evaluate the oxidation performance. Microstructural characterization of all the oxidised samples was carried out using the above mentioned techniques. In addition, the various oxide phases formed on the coated Nb alloy substrate have been identified using XPS (X-Ray Photo Spectroscopy) analysis. The silicide coated samples showed better oxidation resistance than the bare Nb alloy.