In situ formation of metal-ceramic microstructures in the NiAlO system by partial reduction reactions

E. Üstündag; R. Subramanian; R. Dieckmann; S. L. Sass

doi:10.1016/0956-7151(95)90294-5

In situ formation of metal-ceramic microstructures in the NiAlO system by partial reduction reactions

E. Üstündag^*, R. Subramanian, R. Dieckmann, S. L. Sass

^*Bu çalışma için yazışmadan sorumlu yazar

Cornell University

Araştırma sonucu: Dergiye katkı › Makale › bilirkişi

44 Atıf (Scopus)

Özet

Metal-ceramic microstructures were obtained by partial reduction of the spinel compound NiAl₂O₄. Electron microscopy studies were performed for microstructural characterization, phase identification and chemical analysis. Depending on the reduction temperature, two different morphologies of nearly pure Ni particles, equiaxed and rod-like, form within a ceramic matrix. The equiaxed Ni particles (0.02-0.5 μm in diameter) are embedded in α-Al₂O₃, while the rod-like Ni particles (∼ 5 μm in length and ∼ 0.1 μm in diameter) are in a metastable "defect spinel" containing much less Ni than NiAl₂O₄. The fracture toughness of the NiAl₂O₃ mixture was significantly improved with respect to that of the original spinel phase.

Orijinal dil	İngilizce
Sayfa (başlangıç-bitiş)	383-389
Sayfa sayısı	7
Dergi	Acta Metallurgica et Materialia
Hacim	43
Basın numarası	1
DOI'lar	https://doi.org/10.1016/0956-7151(95)90294-5
Yayın durumu	Yayınlandı - Oca 1995
Harici olarak yayınlandı	Evet

Finansman

Acknowledgements--This research was supported by the Office of Naval Research under Grant N00014-92-J-1526. The use of the Electron Microscopy and Materials Preparation Facilities of the Materials Science Center at Cornell University funded by the National Science Foundation under Grant No. DMR-91-21564 is gratefully acknowledged. The early work of J. Hillman, and the assistance of Y. Shapiro, S. Reeves and A. Kleinsmith was greatly appreciated.

Finansörler	Finansör numarası
Materials Science Center at Cornell University
National Science Foundation
Office of Naval Research	N00014-92-J-1526

Belgeye Erişim

10.1016/0956-7151(95)90294-5

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

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title = "In situ formation of metal-ceramic microstructures in the NiAlO system by partial reduction reactions",

abstract = "Metal-ceramic microstructures were obtained by partial reduction of the spinel compound NiAl2O4. Electron microscopy studies were performed for microstructural characterization, phase identification and chemical analysis. Depending on the reduction temperature, two different morphologies of nearly pure Ni particles, equiaxed and rod-like, form within a ceramic matrix. The equiaxed Ni particles (0.02-0.5 μm in diameter) are embedded in α-Al2O3, while the rod-like Ni particles (∼ 5 μm in length and ∼ 0.1 μm in diameter) are in a metastable {"}defect spinel{"} containing much less Ni than NiAl2O4. The fracture toughness of the NiAl2O3 mixture was significantly improved with respect to that of the original spinel phase.",

author = "E. {\"U}st{\"u}ndag and R. Subramanian and R. Dieckmann and Sass, {S. L.}",

year = "1995",

month = jan,

doi = "10.1016/0956-7151(95)90294-5",

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T1 - In situ formation of metal-ceramic microstructures in the NiAlO system by partial reduction reactions

AU - Üstündag, E.

AU - Subramanian, R.

AU - Dieckmann, R.

AU - Sass, S. L.

PY - 1995/1

Y1 - 1995/1

N2 - Metal-ceramic microstructures were obtained by partial reduction of the spinel compound NiAl2O4. Electron microscopy studies were performed for microstructural characterization, phase identification and chemical analysis. Depending on the reduction temperature, two different morphologies of nearly pure Ni particles, equiaxed and rod-like, form within a ceramic matrix. The equiaxed Ni particles (0.02-0.5 μm in diameter) are embedded in α-Al2O3, while the rod-like Ni particles (∼ 5 μm in length and ∼ 0.1 μm in diameter) are in a metastable "defect spinel" containing much less Ni than NiAl2O4. The fracture toughness of the NiAl2O3 mixture was significantly improved with respect to that of the original spinel phase.

AB - Metal-ceramic microstructures were obtained by partial reduction of the spinel compound NiAl2O4. Electron microscopy studies were performed for microstructural characterization, phase identification and chemical analysis. Depending on the reduction temperature, two different morphologies of nearly pure Ni particles, equiaxed and rod-like, form within a ceramic matrix. The equiaxed Ni particles (0.02-0.5 μm in diameter) are embedded in α-Al2O3, while the rod-like Ni particles (∼ 5 μm in length and ∼ 0.1 μm in diameter) are in a metastable "defect spinel" containing much less Ni than NiAl2O4. The fracture toughness of the NiAl2O3 mixture was significantly improved with respect to that of the original spinel phase.

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DO - 10.1016/0956-7151(95)90294-5

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SN - 0956-7151

VL - 43

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JO - Acta Metallurgica et Materialia

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IS - 1

ER -

In situ formation of metal-ceramic microstructures in the NiAlO system by partial reduction reactions

Özet

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