Influence of Time on Thermal Oxidation of CP-Ti Grade II at 850 °C

Abstract

The objective of this work is to understand the influence of time on thermal oxidation of CP-Ti Grade II at 850 oC. Thermal treatments were performed for 5 minutes, 15 minutes, 30 minutes, 60 minutes and 120 minutes of isothermal stage. The response of titanium to oxidation at same temperatures and various timings has been investigated, in terms of layer thickness, phase evolution. A variety of experimental and analytical techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM) and ball cratering test have been used to characterize the result of thermal oxidized surfaces. The results showed that oxygen diffused on Ti structure can produce a thick oxide layer with rutile (TiO2) between 3,50 and 10,34 microns, which exhibited good adhesion with the substrate.

Tribological Tests and SEM Analysis for Titanium Oxide Layers

“…Figure7represents the wear tracks with a bigger magnitude. The wear track for the sample of five minutes shows an area of a bigger percentege of titanium on the surface as is presented in figure8, instead of 120 minutes sample which has a thicker layer and does not meet areas of pure titanium[8].…”

Electrochemical Mechanism of Molten Salt Electrolysis from TiO2 to Titanium

“…Titanium ore mainly ilmenite and rutile, widely distributed in the earth’s crust and lithosphere. Titanium and its alloys have been widely used in aerospace, national defense, ocean, energy, transportation, medical, and other fields due to its advantages of low density, high specific strength, good heat resistance, and corrosion resistance [ 1 , 2 , 3 ]. Therefore, titanium has a “21st century metal”, “all-round metal”, and “modern metal” reputation [ 4 ].…”