|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Energy Materials 2017: Materials for Energy Conversion with Emphasis on SOFC
||Plasma Sprayed Protective Coatings on Metallic SOFC Interconnects: Interplay between Processing and Performance
||Sanjay Sampath, Su Jung Han, Hwasoo Lee
|On-Site Speaker (Planned)
Conductive oxides coatings are applied onto metallic interconnects via plasma spray to prevent chrome poisoning and cell degradation. Most common materials include Strontium doped Lanthanum Manganite (La(Sr)MnO3) or Manganese cobalt spinel (Mn1.5Co1.5O4). The characteristics and performance of these sprayed coatings are strongly dependent on their processing since these coatings have significant process induced defects. For instance the strong thermal gradients within the plasma can cause preferential evaporation of certain cations which can affect the stoichiometry and phases as well as oxidation state of the deposited materials. These chemical changes combined with physical defects such as pores, cracks and interfaces can lead to ineffective protective and functional performance. However, through judicious selection of process paramters constructed through the framework of process maps and advanced property measurements enabled synthesis of high quality deposits. This presentation will provide illustrative examples of the process mapping concepts in context both protective and functional performance.
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