Plasma Spray Physical Vapor Deposition of La1?em class="a-plus-plus">x Sr x Co y Fe _{详细信息    查看全文}

• 作者：Maria Ophelia Jarligo (1)
  Georg Mauer (1)
  Martin Bram (1)
  Stefan Baumann (1)
  Robert Va?en (1)
  
• 关键词：perovskite La1?x Sr x Co y Fe1?y O3?ο plasma spray physical vapor deposition ; porous metallic support ; oxygen transport membrane ; thin films
• 刊名：Journal of Thermal Spray Technology
• 出版年：2014
• 出版时间：January 2014
• 年：2014
• 卷：23
• 期：1-2
• 页码：213-219
• 全文大小：961 KB
• 作者单位：Maria Ophelia Jarligo (1)
  Georg Mauer (1)
  Martin Bram (1)
  Stefan Baumann (1)
  Robert Va?en (1)
  
  1. Institut für Energie- und Klimaforschung (IEK-1), Forschungszentrum Jülich GmbH, Jülich, Germany
  
• ISSN：1544-1016

文摘

Plasma spray physical vapor deposition (PS-PVD) is a very promising route to manufacture ceramic coatings, combining the efficiency of thermal spray processes and characteristic features of thin PVD coatings. Recently, this technique has been investigated to effectively deposit dense thin films of perovskites particularly with the composition of La0.58Sr0.4Co0.2Fe0.8O3?ο/sub> (LSCF) for application in gas separation membranes. Furthermore, asymmetric type of membranes with porous metallic supports has also attracted research attention due to the advantage of good mechanical properties suitable for use at high temperatures and high permeation rates. In this work, both approaches are combined to manufacture oxygen transport membranes made of gastight LSCF thin film by PS-PVD on porous NiCoCrAlY metallic supports. The deposition of homogenous dense thin film is challenged by the tendency of LSCF to decompose during thermal spray processes, irregular surface profile of the porous metallic substrate and crack and pore-formation in typical ceramic thermal spray coatings. Microstructure formation and coating build-up during PS-PVD as well as the annealing behavior at different temperatures of LSCF thin films were investigated. Finally, measurements of leak rates and oxygen permeation rates at elevated temperatures show promising results for the optimized membranes.