|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||High Temperature Corrosion of Structural Materials
||Stability of Protective Oxide Scales Formed on Pure Titanium with Silicon-bearing Films
||Kathleen Chou, Peng-Wei Chu, Carlos G. Levi, Emmanuelle A. Marquis
|On-Site Speaker (Planned)
Titanium alloys, which are widely used in the aerospace industry, show poor oxidation resistance above 550°C due to the formation of a non-protective TiO<SUB>2</SUB> (rutile) oxide. Interest in increasing the use of these alloys at higher temperatures has driven development of coatings and surface treatments, which influence the morphology and phases of complex reaction products evolved during oxidation. Si has been investigated as an alloying element and incorporated in surface coatings, which have been shown to reduce oxide growth rate at elevated temperatures by hindering porous internal oxide formation. The formation and stability of titanium silicide layers that promote protective oxide scales on pure Ti with Si-bearing films at 800°C have been investigated using cross-sectional transmission electron microscopy, electron diffraction, and energy-dispersive spectroscopy mapping. The impact of these results on understanding of alloyed Ti oxidation will also be discussed.
||Planned: Supplemental Proceedings volume