Abstract
The oxidation behavior of pure titanium at 1 000-1 400 K has been studied in air at 67-2 670 Pa using metallographic and electron probe microanalysis techniques.
Oxidation scales formed at temperatures less than 1 200 K (67 Pa) and 1 300 K (267 and 2 670 Pa) and more than them consisted of periodic multilayers and a single layer of rutile parallel to the reaction interface, respectively.
The growth kinetics of periodic multilayers of scale and the permeation depth oxygen in titanium were obayed parabolic rate laws. The apparent activation energies for them were estimated to be 248-263 kJ/mol and 156-183 kJ/mol, respectively. The rate determining diffusion elements for them were discussed.
