Influence of porosity on hardness and Young's modulus of nanoporous EB-PVD TBCs by nanoindentation

Byung Koog Jang; Hideaki Matsubara

doi:10.1016/j.matlet.2005.06.014

Influence of porosity on hardness and Young's modulus of nanoporous EB-PVD TBCs by nanoindentation

Byung Koog Jang, Hideaki Matsubara

ENV - Environmental Studies for Advanced Society

Japan Fine Ceramics Center

Research output: Contribution to journal › Article › peer-review

102 Citations (Scopus)

Abstract

The hardness and Young's modulus of ZrO₂-4 mol% Y ₂O₃ coating layers fabricated by EB-PVD are characterized using a nanoindentation technique. Coatings consist of porous, aligned columnar structure. The porosity of the coatings increased with increasing substrate rotation speed during deposition. The hardness and Young's modulus showed a significant dependence on the porosity and a strong anisotropy due to the columnar microstructure. The hardness and Young's modulus of the surface regions of the coatings is found to be higher than that of the side regions. The hardness and Young's moduli of the surface regions of the coatings have a nearly constant value, whereas those of the side areas decreased with increasing the porosity.

Original language	English
Pages (from-to)	3462-3466
Number of pages	5
Journal	Materials Letters
Volume	59
Issue number	27
DOIs	https://doi.org/10.1016/j.matlet.2005.06.014
Publication status	Published - 2005 Nov

Keywords

EB-PVD
Hardness
Nanoindentation
Porosity
Young's modulus
YSZ

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10.1016/j.matlet.2005.06.014

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title = "Influence of porosity on hardness and Young's modulus of nanoporous EB-PVD TBCs by nanoindentation",

abstract = "The hardness and Young's modulus of ZrO2-4 mol% Y 2O3 coating layers fabricated by EB-PVD are characterized using a nanoindentation technique. Coatings consist of porous, aligned columnar structure. The porosity of the coatings increased with increasing substrate rotation speed during deposition. The hardness and Young's modulus showed a significant dependence on the porosity and a strong anisotropy due to the columnar microstructure. The hardness and Young's modulus of the surface regions of the coatings is found to be higher than that of the side regions. The hardness and Young's moduli of the surface regions of the coatings have a nearly constant value, whereas those of the side areas decreased with increasing the porosity.",

keywords = "EB-PVD, Hardness, Nanoindentation, Porosity, Young's modulus, YSZ",

author = "Jang, {Byung Koog} and Hideaki Matsubara",

note = "Funding Information: The authors acknowledge the financial support of the New Energy and Industrial Technology Development Organization (NEDO), Japan.",

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T1 - Influence of porosity on hardness and Young's modulus of nanoporous EB-PVD TBCs by nanoindentation

AU - Jang, Byung Koog

AU - Matsubara, Hideaki

N1 - Funding Information: The authors acknowledge the financial support of the New Energy and Industrial Technology Development Organization (NEDO), Japan.

PY - 2005/11

Y1 - 2005/11

N2 - The hardness and Young's modulus of ZrO2-4 mol% Y 2O3 coating layers fabricated by EB-PVD are characterized using a nanoindentation technique. Coatings consist of porous, aligned columnar structure. The porosity of the coatings increased with increasing substrate rotation speed during deposition. The hardness and Young's modulus showed a significant dependence on the porosity and a strong anisotropy due to the columnar microstructure. The hardness and Young's modulus of the surface regions of the coatings is found to be higher than that of the side regions. The hardness and Young's moduli of the surface regions of the coatings have a nearly constant value, whereas those of the side areas decreased with increasing the porosity.

AB - The hardness and Young's modulus of ZrO2-4 mol% Y 2O3 coating layers fabricated by EB-PVD are characterized using a nanoindentation technique. Coatings consist of porous, aligned columnar structure. The porosity of the coatings increased with increasing substrate rotation speed during deposition. The hardness and Young's modulus showed a significant dependence on the porosity and a strong anisotropy due to the columnar microstructure. The hardness and Young's modulus of the surface regions of the coatings is found to be higher than that of the side regions. The hardness and Young's moduli of the surface regions of the coatings have a nearly constant value, whereas those of the side areas decreased with increasing the porosity.

KW - EB-PVD

KW - Hardness

KW - Nanoindentation

KW - Porosity

KW - Young's modulus

KW - YSZ

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DO - 10.1016/j.matlet.2005.06.014

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SN - 0167-577X

VL - 59

SP - 3462

EP - 3466

JO - Materials Letters

JF - Materials Letters

IS - 27

ER -

Influence of porosity on hardness and Young's modulus of nanoporous EB-PVD TBCs by nanoindentation

Abstract

Keywords

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