|About this Abstract
||2011 TMS Annual Meeting & Exhibition
||Surfaces and Heterostructures at Nano- or Micro-Scale and Their Characterization, Properties, and Applications
||Oxidation and Interfacial Structure of Ti3Al
||Muralidharan Ramachandran, Ramana G. Reddy
|On-Site Speaker (Planned)
The isothermal oxidation of binary Ti<SUB>3</SUB>Al was studied as function of temperature in pure oxygen atmosphere. Weight gain data were acquired using thermo-gravimetric analyzer (TGA). The phase analysis of the base metal and the oxide layer were performed using x-ray diffraction, while the morphology and elemental composition were determined using scanning electron microscopy (SEM) and Transmission Electron Microscopy (TEM). The rate constant of the oxidation process increases from 9.75 X 10<SUP>-4</SUP> mg<SUP>2</SUP>/cm<SUP>4</SUP>/min at 1023K to 5.05 X 10<SUP>-2</SUP> mg<SUP>2</SUP>/cm<SUP>4</SUP>/min at 1223K. The activation energy for the oxidation process was determined to be 240.5 kJ/mol. The particle size in the oxide scale increased with the increase in temperature. At higher temperatures formation of layered structures was observed. The composition and structure of the metal/oxide interface was analyzed.
||Planned: A CD-only volume