Influence of residual stresses on the evolution of microstructure during the partial reduction of NiAl2O4

E. Üstündag; Z. Zhang; M. L. Stocker; P. Rangaswamy; M. A.M. Bourke; S. Subramanian; K. E. Sickafus; J. A. Roberts; S. L. Sass

doi:10.1016/S0921-5093(97)00433-4

Influence of residual stresses on the evolution of microstructure during the partial reduction of NiAl₂O₄

E. Üstündag^*, Z. Zhang, M. L. Stocker, P. Rangaswamy, M. A.M. Bourke, S. Subramanian, K. E. Sickafus, J. A. Roberts, S. L. Sass

^*Bu çalışma için yazışmadan sorumlu yazar

Araştırma sonucu: Dergiye katkı › Makale › bilirkişi

22 Atıf (Scopus)

Özet

Metal-ceramic microstructures were formed in situ by the partial reduction (i.e. the reduction of only one of the metallic elements) of the spinel compound NiAl₂O₄. Depending on reduction conditions, these microstructures consist of Ni particles embedded in an α-Al₂O₃ or a multiphase matrix called 'defect spinel'. The volume shrinkage that accompanies the reaction generates residual stresses which profoundly affect the microstructure evolution. Conversely, formation of metastable, intermediate phases, generation of porosity and cracking are all observed and may act to relax the residual stresses. Electron microscopy observations as well as both neutron and X-ray diffraction residual stress measurements are used to study the influence of residual stresses on the microstructure evolution during the reduction process.

Orijinal dil	İngilizce
Sayfa (başlangıç-bitiş)	50-65
Sayfa sayısı	16
Dergi	Materials Science and Engineering: A
Hacim	238
Basın numarası	1
DOI'lar	https://doi.org/10.1016/S0921-5093(97)00433-4
Yayın durumu	Yayınlandı - 30 Eki 1997
Harici olarak yayınlandı	Evet

Finansman

This work was supported by the US Office of Naval Research under Grant No. NOOO14-92-J-1526 at Cornell University and by a Laboratory Directed Research and Development project at Los Alamos National Laboratory. E. Ustiindag acknowledges the financial support by a Director-Funded Post-doctoral Fellowship at Los Alamos. S. Subramanian was supported by the US Department of Energy Grant No. DE-FG02-85ER45211 at Cornell. ML Stocker began this study as a project for an undergraduate Materials Science and Engineering Research Involvement course. The Manuel Lujan Jr. Neutron Scattering Center at Los Alamos is a national user facility supported by DOE/DP and DOE/ BES under contract W-7405-ENG-36. The use of the Materials Preparation, X-ray and Electron Microscopy facilities of the Materials Science Center at Cornell University, which is supported by the National Science Foundation is also acknowledged.

Finansörler	Finansör numarası
DOE/DP
US Department of Energy
US Office of Naval Research
National Science Foundation
U.S. Department of Energy
Basic Energy Sciences	W-7405-ENG-36

Belgeye Erişim

10.1016/S0921-5093(97)00433-4

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

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title = "Influence of residual stresses on the evolution of microstructure during the partial reduction of NiAl2O4",

abstract = "Metal-ceramic microstructures were formed in situ by the partial reduction (i.e. the reduction of only one of the metallic elements) of the spinel compound NiAl2O4. Depending on reduction conditions, these microstructures consist of Ni particles embedded in an α-Al2O3 or a multiphase matrix called 'defect spinel'. The volume shrinkage that accompanies the reaction generates residual stresses which profoundly affect the microstructure evolution. Conversely, formation of metastable, intermediate phases, generation of porosity and cracking are all observed and may act to relax the residual stresses. Electron microscopy observations as well as both neutron and X-ray diffraction residual stress measurements are used to study the influence of residual stresses on the microstructure evolution during the reduction process.",

keywords = "Microstructure, NiAlO, Reduction reactions, Residual stresses",

author = "E. {\"U}st{\"u}ndag and Z. Zhang and Stocker, {M. L.} and P. Rangaswamy and Bourke, {M. A.M.} and S. Subramanian and Sickafus, {K. E.} and Roberts, {J. A.} and Sass, {S. L.}",

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TY - JOUR

T1 - Influence of residual stresses on the evolution of microstructure during the partial reduction of NiAl2O4

AU - Üstündag, E.

AU - Zhang, Z.

AU - Stocker, M. L.

AU - Rangaswamy, P.

AU - Bourke, M. A.M.

AU - Subramanian, S.

AU - Sickafus, K. E.

AU - Roberts, J. A.

AU - Sass, S. L.

PY - 1997/10/30

Y1 - 1997/10/30

N2 - Metal-ceramic microstructures were formed in situ by the partial reduction (i.e. the reduction of only one of the metallic elements) of the spinel compound NiAl2O4. Depending on reduction conditions, these microstructures consist of Ni particles embedded in an α-Al2O3 or a multiphase matrix called 'defect spinel'. The volume shrinkage that accompanies the reaction generates residual stresses which profoundly affect the microstructure evolution. Conversely, formation of metastable, intermediate phases, generation of porosity and cracking are all observed and may act to relax the residual stresses. Electron microscopy observations as well as both neutron and X-ray diffraction residual stress measurements are used to study the influence of residual stresses on the microstructure evolution during the reduction process.

AB - Metal-ceramic microstructures were formed in situ by the partial reduction (i.e. the reduction of only one of the metallic elements) of the spinel compound NiAl2O4. Depending on reduction conditions, these microstructures consist of Ni particles embedded in an α-Al2O3 or a multiphase matrix called 'defect spinel'. The volume shrinkage that accompanies the reaction generates residual stresses which profoundly affect the microstructure evolution. Conversely, formation of metastable, intermediate phases, generation of porosity and cracking are all observed and may act to relax the residual stresses. Electron microscopy observations as well as both neutron and X-ray diffraction residual stress measurements are used to study the influence of residual stresses on the microstructure evolution during the reduction process.

KW - Microstructure

KW - NiAlO

KW - Reduction reactions

KW - Residual stresses

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