Please use this identifier to cite or link to this item:
Title: Optimization of Synthesis Parameters to Obtain NbB2 Nanopowder at Low Temperature
Authors: Singhal, Varun
Pandey, O.P. (Guide)
Keywords: Niobium diboride;nanopowder;Thermal stability;Williamson Hall analysis
Issue Date: 11-Sep-2017
Abstract: Transition metal borides (TMBs) are mostly used in industrial applications, due to their high melting points, good mechanical properties (hardness, Young’s modulus), chemical stability, and thermal stability. Among all the TMBs, niobium di-boride (NbB2) has high wear resistance, chemically stability and oxidation resistance. NbB2 has been prepared by reacting niobium pent-oxide (Nb2O5), metallic magnesium (Mg) and borax (Na2B4O7.10H2O) at 8000C in specially designed autoclave. The synthesized powder samples are characterized by X-ray diffraction (XRD) for crystallographic features. The broadening of XRD diffraction peaks corresponding to NbB2 is analysed by using Williamson-Hall (W-H) analysis to calculate strain, stress, strain energy density for all the samples and Thermal stability of synthesized single phase NbB2 was determined by TGA/DSC analysis. Moreover, Morphological observations suggested the formation of nano NbB2 rods by joining NbB2 nanoparticles with a fine coating.
Description: Master of Technology -Metallurgical & Materials Engineering
Appears in Collections:Masters Theses@SPMS

Files in This Item:
File Description SizeFormat 
4860.pdf3.09 MBAdobe PDFView/Open    Request a copy

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.