Directional crystallization of columnar-grained monoclinic Y 2O3 under high pressure

Stuart Deutsch; Jafar F. Al-Sharab; Bernard H. Kear; Stephen D. Tse; Oleg A. Voronov; Christopher S. Nordahl

doi:10.1016/j.scriptamat.2013.07.021

Directional crystallization of columnar-grained monoclinic Y ₂O₃ under high pressure

Stuart Deutsch, Jafar F. Al-Sharab, Bernard H. Kear, Stephen D. Tse, Oleg A. Voronov, Christopher S. Nordahl

School of Engineering, Mechanical & Aerospace Engineering

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

2 Scopus citations

Abstract

A pressure-induced directional crystallization process is described to convert equiaxially-grained cubic Y₂O₃ into columnar-grained monoclinic Y₂O₃. The conversion to the columnar-grained structure initiates at the sample surface, propagates into the sample interior and eventually encompasses the entire sample volume. Optimal processing conditions are about 3.0 GPa at 1000 C. It is proposed that the phase transformation from cubic Y₂O₃ to the higher density monoclinic Y₂O₃ provides the driving force for columnar grain growth.

Original language	English (US)
Pages (from-to)	651-653
Number of pages	3
Journal	Scripta Materialia
Volume	69
Issue number	9
DOIs	https://doi.org/10.1016/j.scriptamat.2013.07.021
State	Published - Nov 2013

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

Keywords

Directional crystallization
Metal and alloys (rare earth)
Phase transformation kinetics
Polymorphic phase transformation
Recrystallization

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@article{22471a1ae722458e87717243757bf5c0,

title = "Directional crystallization of columnar-grained monoclinic Y 2O3 under high pressure",

abstract = "A pressure-induced directional crystallization process is described to convert equiaxially-grained cubic Y2O3 into columnar-grained monoclinic Y2O3. The conversion to the columnar-grained structure initiates at the sample surface, propagates into the sample interior and eventually encompasses the entire sample volume. Optimal processing conditions are about 3.0 GPa at 1000 C. It is proposed that the phase transformation from cubic Y2O3 to the higher density monoclinic Y2O3 provides the driving force for columnar grain growth.",

keywords = "Directional crystallization, Metal and alloys (rare earth), Phase transformation kinetics, Polymorphic phase transformation, Recrystallization",

author = "Stuart Deutsch and Al-Sharab, {Jafar F.} and Kear, {Bernard H.} and Tse, {Stephen D.} and Voronov, {Oleg A.} and Nordahl, {Christopher S.}",

note = "Funding Information: This work was supported by the Office of Naval Research (Grant N00014-08-1-1029) and the U.S. Army ARDEC (Contract W15QKN-11-C-0118). ",

year = "2013",

month = nov,

doi = "10.1016/j.scriptamat.2013.07.021",

language = "English (US)",

volume = "69",

pages = "651--653",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Elsevier Limited",

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TY - JOUR

T1 - Directional crystallization of columnar-grained monoclinic Y 2O3 under high pressure

AU - Deutsch, Stuart

AU - Al-Sharab, Jafar F.

AU - Kear, Bernard H.

AU - Tse, Stephen D.

AU - Voronov, Oleg A.

AU - Nordahl, Christopher S.

N1 - Funding Information: This work was supported by the Office of Naval Research (Grant N00014-08-1-1029) and the U.S. Army ARDEC (Contract W15QKN-11-C-0118).

PY - 2013/11

Y1 - 2013/11

N2 - A pressure-induced directional crystallization process is described to convert equiaxially-grained cubic Y2O3 into columnar-grained monoclinic Y2O3. The conversion to the columnar-grained structure initiates at the sample surface, propagates into the sample interior and eventually encompasses the entire sample volume. Optimal processing conditions are about 3.0 GPa at 1000 C. It is proposed that the phase transformation from cubic Y2O3 to the higher density monoclinic Y2O3 provides the driving force for columnar grain growth.

AB - A pressure-induced directional crystallization process is described to convert equiaxially-grained cubic Y2O3 into columnar-grained monoclinic Y2O3. The conversion to the columnar-grained structure initiates at the sample surface, propagates into the sample interior and eventually encompasses the entire sample volume. Optimal processing conditions are about 3.0 GPa at 1000 C. It is proposed that the phase transformation from cubic Y2O3 to the higher density monoclinic Y2O3 provides the driving force for columnar grain growth.

KW - Directional crystallization

KW - Metal and alloys (rare earth)

KW - Phase transformation kinetics

KW - Polymorphic phase transformation

KW - Recrystallization

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