|About this Abstract
||Materials Science & Technology 2011
||MS&T'11 Poster Session
||232 In-Situ Processing of Alumina Layers by PTA
||Fabiano Oscar Drozda, Sidnei Antônio Pianaro, Ana Sofia C. M. D´Oliveira
|On-Site Speaker (Planned)
||Ana Sofia C. M. D´Oliveira
The protection of metallic components with ceramic coatings enhances the service life of equipment. Processing of ceramic coatings by Plasma Transferred Arc has failed to show acceptable results associated with the poor bond between the ceramic coating and the metallic substrate. This study is part of an ongoing project that aims to process alumina coatings by Plasma Transferred Arc. Mixtures of magnesium silicates (talc) with Al powders (40wt%) were deposited on carbon steel plates, using deposition currents ranging from 70A to 180A. Coatings were characterized by scanning electron microscopy and X-ray diffraction analysis. Sound coatings were processed for deposition currents of 120A and above. In-situ synthesis of Al2O3 grown on Fe aluminides was identified. A reaction mechanism is put forward to discuss the alumina layer formed.