Distribution and structures of nanopores in YSZ-TBC deposited by EB-PVD

Jung, Yun Chul; Sasaki, Takeo; Tomimatsu, Toru; Matsunaga, Katsuyuki; Yamamoto, Takahisa; Kagawa, Yutaka; Ikuhara, Yuichi

doi:10.1016/j.stam.2003.12.002

Cited by 11 publications

(12 citation statements)

References 18 publications

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“…Thus, the presence of a surface structure, such as columnar features, influences grain coarsening and GB migration within the microstructure and promotes the presence of distinct grain orientations. The observation of columnar structures containing distinct grain orientations has been hypothesized [2,[26][27][28] and is in qualitative agreement with experimental observations in thin film oxides [28,29], alloys [30], and aluminum [31]. Note the choice of will influence these grain evolution effects.…”

Section: Model Parameterssupporting

confidence: 86%

Phase-field models for simulating physical vapor deposition and grain evolution of isotropic single-phase polycrystalline thin films

Stewart

Spearot

2016

Computational Materials Science

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Section: Model Parameterssupporting

confidence: 86%

Phase-field models for simulating physical vapor deposition and grain evolution of isotropic single-phase polycrystalline thin films

Stewart

Spearot

2016

Computational Materials Science

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“…Dense films with a thickness of around 10 mm are clearly shown in the photograph. These relatively dense films are typical products of EBPVD coating technology whereas the plasma-sprayed coating layers contain many defects and pores [1,[6][7][8][9][10][11].…”

Section: Microstructure Controlmentioning

confidence: 99%

“…However, as plasma sprayed coatings contain several defects and poor strain tolerance, current research is directed toward the development of processes to produce more reliable coatings, such as electron beam physical vapour deposition (EBPVD) [6][7][8][9][10][11]. The microstructure of EBPVD brittle coating layers exhibits higher strain compliance, owing to its columnar grain structure, than commercial plasma-sprayed coating layers.…”

Section: Introductionmentioning

confidence: 99%

Indentation on YSZ thermal barrier coating layers deposited by electron beam PVD

Park

Kim

et al. 2006

Philosophical Magazine

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We have deposited an yttria-stabilized zirconia (YSZ) layer consisting of microsized grains on an alumina substrate using electron beam physical vapour deposition (EBPVD). The effects of Y 2 O 3 concentration and the coating microstructures of YSZ on indentation damage are investigated. Different coating microstructures are prepared by varying the substrate temperature during deposition. Hertzian and nanoindentation are used to characterize the damage responses of the YSZ thermal barrier-coated alumina layered systems. The damage and failure behaviours have been investigated in relation to the effects of microstructures formed at various substrate temperatures as well as indentation loads from indentation tests. Elastic modulus, hardness, and stress-strain behaviours are characterized by results of the indentation tests. With increasing substrate temperature during the EBPVD process, the overall grain sizes became coarser with a smaller fraction of weak interfaces between the columns, and became more faceted. This change in microstructure ultimately influences the indentation behaviour. The results according to the use of smaller and larger scaled indenters during Hertzian/nanoindentations were also analyzed.

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“…Various techniques can be employed for TBC deposition including plasma spraying, physical vapour deposition and chemical vapour deposition [3][4][5][6][7]. In plasma spraying processes, the coating materials in powder form are deposited in a molten or semi-molten condition on a substrate to form a spray deposit.…”

Section: Introductionmentioning

confidence: 99%