|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||High Temperature Corrosion of Structural Materials
||Protection of Ti Based Materials Against High Temperature Oxidation by the Fluorine Effect
||Alexander Donchev, Mathias Galetz
|On-Site Speaker (Planned)
Titanium based materials form a passive layer at ambient temperatures which protects the components against environmental attack. This layer gets deteriorated at elevated temperatures. Hence the attack is accelerated. Additionally the oxygen ingress into the materials is not hindered anymore. Due to the high oxygen solubility the mechanical properties are influenced negatively, i.e. environmental embrittlement. To overcome these problems the formation of an alumina layer could be one promising solution. Alumina provides very good protection against high temperature corrosion. The Al content has to be increased up to at least 40at.% to get the fluorine effect to operate. Therefore, the materials were enriched in a quite narrow surface zone by the powder pack process. Additional fluorine treatment leads to the formation of a thin, protective alumina layer by the so called fluorine effect.
||Planned: Supplemental Proceedings volume