Microstructures, microhardness, and crystallization behaviors of amorphous Al2 O3-YSZ coatings prepared by air plasma spraying

X. Song, T. Suhonen, C. Sun, L. Huang, X. Zheng, Y. Zeng

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Abstract

Three types of amorphous Al2O3-yttria-stabilized zirconia (YSZ) coatings were prepared using air plasma spraying (APS). The effects of the APS parameters on the microstructure, porosity, amorphous-phase content, and microhardness of the coatings were investigated using scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and transmission electron microscopy (TEM). The results indicated that the microstructure of the coatings was dependent on the APS parameters used. The porosity of the coatings and the number of unmelted particles deposited increased with the flow rate of the primary plasma gas increasing. The amorphous-phase contents and microhardness values of the coatings exhibited a trend opposite to that of their porosity and the number of unmelted particles present in them. The crystallization behaviors and microhardness values of Al2O3-YSZ coatings annealed at different temperatures were also investigated. The results indicated that the coatings with higher amorphous-phase contents possessed homogeneous nanocrystalline structure and exhibited higher microhardness values after the heat treatments.
Original languageEnglish
Article number1550047
Number of pages12
JournalSurface Review and Letters
Volume22
Issue number4
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

Fingerprint

plasma spraying
Plasma spraying
Yttria stabilized zirconia
Crystallization
yttria-stabilized zirconia
Microhardness
microhardness
crystallization
coatings
Coatings
microstructure
Microstructure
air
Air
Porosity
porosity
Plasma Gases
nanostructure (characteristics)
Differential scanning calorimetry
heat treatment

Keywords

  • air plasma spraying
  • Amorphous Al2 O3-YSZ coatings
  • crystallization
  • heat treatment
  • microstructure
  • ProperPart
  • ProperTune

Cite this

@article{13cf5a2c2ead4ff98cc39f5808108a3b,
title = "Microstructures, microhardness, and crystallization behaviors of amorphous Al2 O3-YSZ coatings prepared by air plasma spraying",
abstract = "Three types of amorphous Al2O3-yttria-stabilized zirconia (YSZ) coatings were prepared using air plasma spraying (APS). The effects of the APS parameters on the microstructure, porosity, amorphous-phase content, and microhardness of the coatings were investigated using scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and transmission electron microscopy (TEM). The results indicated that the microstructure of the coatings was dependent on the APS parameters used. The porosity of the coatings and the number of unmelted particles deposited increased with the flow rate of the primary plasma gas increasing. The amorphous-phase contents and microhardness values of the coatings exhibited a trend opposite to that of their porosity and the number of unmelted particles present in them. The crystallization behaviors and microhardness values of Al2O3-YSZ coatings annealed at different temperatures were also investigated. The results indicated that the coatings with higher amorphous-phase contents possessed homogeneous nanocrystalline structure and exhibited higher microhardness values after the heat treatments.",
keywords = "air plasma spraying, Amorphous Al2 O3-YSZ coatings, crystallization, heat treatment, microstructure, ProperPart, ProperTune",
author = "X. Song and T. Suhonen and C. Sun and L. Huang and X. Zheng and Y. Zeng",
year = "2015",
doi = "10.1142/S0218625X1550047X",
language = "English",
volume = "22",
journal = "Surface Review and Letters",
issn = "0218-625X",
publisher = "World Scientific Publishing",
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}

Microstructures, microhardness, and crystallization behaviors of amorphous Al2 O3-YSZ coatings prepared by air plasma spraying. / Song, X.; Suhonen, T.; Sun, C.; Huang, L.; Zheng, X.; Zeng, Y.

In: Surface Review and Letters, Vol. 22, No. 4, 1550047, 2015.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Microstructures, microhardness, and crystallization behaviors of amorphous Al2 O3-YSZ coatings prepared by air plasma spraying

AU - Song, X.

AU - Suhonen, T.

AU - Sun, C.

AU - Huang, L.

AU - Zheng, X.

AU - Zeng, Y.

PY - 2015

Y1 - 2015

N2 - Three types of amorphous Al2O3-yttria-stabilized zirconia (YSZ) coatings were prepared using air plasma spraying (APS). The effects of the APS parameters on the microstructure, porosity, amorphous-phase content, and microhardness of the coatings were investigated using scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and transmission electron microscopy (TEM). The results indicated that the microstructure of the coatings was dependent on the APS parameters used. The porosity of the coatings and the number of unmelted particles deposited increased with the flow rate of the primary plasma gas increasing. The amorphous-phase contents and microhardness values of the coatings exhibited a trend opposite to that of their porosity and the number of unmelted particles present in them. The crystallization behaviors and microhardness values of Al2O3-YSZ coatings annealed at different temperatures were also investigated. The results indicated that the coatings with higher amorphous-phase contents possessed homogeneous nanocrystalline structure and exhibited higher microhardness values after the heat treatments.

AB - Three types of amorphous Al2O3-yttria-stabilized zirconia (YSZ) coatings were prepared using air plasma spraying (APS). The effects of the APS parameters on the microstructure, porosity, amorphous-phase content, and microhardness of the coatings were investigated using scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and transmission electron microscopy (TEM). The results indicated that the microstructure of the coatings was dependent on the APS parameters used. The porosity of the coatings and the number of unmelted particles deposited increased with the flow rate of the primary plasma gas increasing. The amorphous-phase contents and microhardness values of the coatings exhibited a trend opposite to that of their porosity and the number of unmelted particles present in them. The crystallization behaviors and microhardness values of Al2O3-YSZ coatings annealed at different temperatures were also investigated. The results indicated that the coatings with higher amorphous-phase contents possessed homogeneous nanocrystalline structure and exhibited higher microhardness values after the heat treatments.

KW - air plasma spraying

KW - Amorphous Al2 O3-YSZ coatings

KW - crystallization

KW - heat treatment

KW - microstructure

KW - ProperPart

KW - ProperTune

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DO - 10.1142/S0218625X1550047X

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JO - Surface Review and Letters

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