Thermal Fatigue Behaviour of Thick and Porous Thermal Barrier Coatings Systems

摘要：

High temperature thermal fatigue causes the failure of Thermal Barrier Coating (TBC) systems. This paper addresses the development of thick TBCs, focusing attention on the microstructure and the porosity of the Yttria Partially Stabilized Zirconia (YPSZ) coating, in relation to its resistance to thermal cycling fatigue. Thick TBCs, with different grade of porosity, were produced by means of a CoNiCrAlY bond coat and Yttria Partially Stabilised Zirconia top coat, both sprayed by Air Plasma Spray. The thermal fatigue resistance of new TBC systems and the evolution of the coatings before and after thermal cycling were evaluated. The limit of thermal fatigue resistance increases with amount of porosity in the top coat. Raman analysis shows that the compressive in-plane stress increases in the TBC systems after thermal cycling, nevertheless the increasing rate has a trend contrary to the porosity level of top coat.

作者: A. Scrivani G. Rizzi U. Bardi C. Giolli M. Muniz Miranda S. Ciattini A. Fossati F. Borgioli

作者单位: Turbocoating S.p.A., Rubbiano di Solignano, Parma, Italy Dipartimento di Chimica, Università di Firenze, Firenze, Italy Dipartimento di Ingegneria Civile, Università di Firenze, Firenze, Italy

会议类型: 国际会议

会议名称: 2007国际热喷涂大会

会议地点: 北京

会议语种:英文

在线出版日期: 2007-05-14（万方平台首次上网日期，不代表论文的发表时间）