Influence of isothermal and cyclic oxidation on the apparent interfacial toughness in thermal barrier coating systems

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• 作者：Y. Liu^a ; ^b ; V. Vidal^a ; ^{Vanessa.Vidal@mines-albi.fr" class="auth_mail" title="E-mail the corresponding author} ; S. Le Roux^a ; F. Blas^a ; ^b ; F. Ansart^b ; P. Lours^a
• 关键词：TBC systems ; Oxidation ; Interfacial indentation ; EB-PVD ; Spallation ; Cracking
• 刊名：Journal of the European Ceramic Society
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：35
• 期：15
• 页码：4269-4275
• 全文大小：1723 K

文摘

In thermal barrier coatings (TBCs), the toughness relative to the interface lying either between the bond coat (BC) and the Thermal Grown Oxide (TGO) or between the TGO and the yttria stabilized zirconia topcoat (TP) is a critical parameter regarding TBCs durability. In this paper, the influence of aging conditions on the apparent interfacial toughness in Electron Beam-Physical Vapor Deposition (EB-PVD) TBCs is investigated using a specifically dedicated approach based on Interfacial Vickers Indentation (IVI), coupled with Scanning Electron Microscopy (SEM) observations to create interfacial cracks and measure the extent of crack propagation, respectively.