Conference Paper: Nanophase decomposition in plasma sprayed ZrO 2(Y 2O 3)/Al 2O 3 coatings

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TitleNanophase decomposition in plasma sprayed ZrO 2(Y 2O 3)/Al 2O 3 coatings
AuthorsLiu, F1
Cosandey, F1
Zhou, X1
Kear, BH1
KeywordsAlumina
Annealing
Ceramic Coatings
Decomposition
Energy Dispersive Spectroscopy
Eutectics
Microstructure
Phase Transitions
Plasma Spraying
Quenching
Stoichiometry
Transmission Electron Microscopy
Volume Fraction
X Ray Diffraction Analysis
Zinc Compounds
Issue Date2004
CitationCeramic Transactions, 2004, v. 148, p. 91-100 [How to Cite?]
AbstractThe microstructure and nanophase decomposition of metastable ZrO 2(3Y 2O 3)/Al 2O 3 coatings formed by air plasma spraying was analyzed by combined TEM techniques of nanoprobe diffraction and X-Ray EDS spectroscopy. For the ZrO 2(3Y 2O 3)/20%Al 2O 3 composition, the initial splat-quenched metastable structure consists of a high volume fraction of primary ZrO 2-rich particles with a thin intergranular phase of eutectic composition. Nanoprobe diffraction analysis revealed the presence of two phases: cubic-ZrO 2, and intergranular nanoscale δ-Al 2O 3. Upon heat treatment at 1200°C, the tetragonal ZrO 2 phase appears with a fine-intergranular dispersion of nanoscale α-Al 2O 3. When the annealing temperature reaches 1400°C, the microstructure evolves into an equilibrium non-segregated nanocomposite structure consisting the α-Al 2O 3 grain dispersed within the ZrO 2 matrix.
ReferencesReferences in Scopus
DC Field
Value
dc.contributor.authorLiu, F
dc.contributor.authorCosandey, F
dc.contributor.authorZhou, X
dc.contributor.authorKear, BH
dc.date.accessioned2010-09-17T10:18:42Z
dc.date.available2010-09-17T10:18:42Z
dc.date.issued2004
dc.description.abstractThe microstructure and nanophase decomposition of metastable ZrO 2(3Y 2O 3)/Al 2O 3 coatings formed by air plasma spraying was analyzed by combined TEM techniques of nanoprobe diffraction and X-Ray EDS spectroscopy. For the ZrO 2(3Y 2O 3)/20%Al 2O 3 composition, the initial splat-quenched metastable structure consists of a high volume fraction of primary ZrO 2-rich particles with a thin intergranular phase of eutectic composition. Nanoprobe diffraction analysis revealed the presence of two phases: cubic-ZrO 2, and intergranular nanoscale δ-Al 2O 3. Upon heat treatment at 1200°C, the tetragonal ZrO 2 phase appears with a fine-intergranular dispersion of nanoscale α-Al 2O 3. When the annealing temperature reaches 1400°C, the microstructure evolves into an equilibrium non-segregated nanocomposite structure consisting the α-Al 2O 3 grain dispersed within the ZrO 2 matrix.
dc.description.natureLink_to_subscribed_fulltext
dc.identifier.citationCeramic Transactions, 2004, v. 148, p. 91-100 [How to Cite?]
dc.identifier.epage100
dc.identifier.scopuseid_2-s2.0-2142661520
dc.identifier.spage91
dc.identifier.urihttp://hdl.handle.net/10722/91402
dc.identifier.volume148
dc.languageeng
dc.relation.ispartofCeramic Transactions
dc.relation.referencesReferences in Scopus
dc.subjectAlumina
dc.subjectAnnealing
dc.subjectCeramic Coatings
dc.subjectDecomposition
dc.subjectEnergy Dispersive Spectroscopy
dc.subjectEutectics
dc.subjectMicrostructure
dc.subjectPhase Transitions
dc.subjectPlasma Spraying
dc.subjectQuenching
dc.subjectStoichiometry
dc.subjectTransmission Electron Microscopy
dc.subjectVolume Fraction
dc.subjectX Ray Diffraction Analysis
dc.subjectZinc Compounds
dc.titleNanophase decomposition in plasma sprayed ZrO 2(Y 2O 3)/Al 2O 3 coatings
dc.typeConference_Paper
Author Affiliations
  1. Rutgers, The State University of New Jersey