Preparation and properties of alumina/nickel-cobalt alloy nanocomposites

Sung Tag Oh; Mutsuo Sando; Koichi Niihara

doi:10.1111/j.1151-2916.1998.tb02729.x

Preparation and properties of alumina/nickel-cobalt alloy nanocomposites

Sung Tag Oh, Mutsuo Sando, Koichi Niihara

Dept. of Materials Science & Engineering

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

29 Scopus citations

Abstract

High-density nickel-cobalt alloy-dispersed Al₂O₃ (Al₂O₃/ Ni-Co alloy) composites were obtained via the hydrogen reduction and hot pressing of Al₂O₃, Ni(NO₃)₂·6H₂O, and Co(NO₃)₂·6H₂O powder mixtures. Microstructural investigations revealed that nanometer-sized alloy particles were dispersed homogeneously at the matrix grain boundaries, forming the intergranular-type nanocomposite. High strength (>1 GPa) was registered for the Al₂O₃/10 wt% Ni-Co alloy composite. An inverse magnetostrictive response to applied stress was observed, because of the Ni-Co alloy dispersions, which indicates promise for incorporating new functions such as stress and fracture sensing into the structural ceramics without any loss of mechanical properties.

Original language	English
Pages (from-to)	3013-3015
Number of pages	3
Journal	Journal of the American Ceramic Society
Volume	81
Issue number	11
DOIs	https://doi.org/10.1111/j.1151-2916.1998.tb02729.x
State	Published - Nov 1998

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10.1111/j.1151-2916.1998.tb02729.x

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title = "Preparation and properties of alumina/nickel-cobalt alloy nanocomposites",

abstract = "High-density nickel-cobalt alloy-dispersed Al2O3 (Al2O3/ Ni-Co alloy) composites were obtained via the hydrogen reduction and hot pressing of Al2O3, Ni(NO3)2·6H2O, and Co(NO3)2·6H2O powder mixtures. Microstructural investigations revealed that nanometer-sized alloy particles were dispersed homogeneously at the matrix grain boundaries, forming the intergranular-type nanocomposite. High strength (>1 GPa) was registered for the Al2O3/10 wt\% Ni-Co alloy composite. An inverse magnetostrictive response to applied stress was observed, because of the Ni-Co alloy dispersions, which indicates promise for incorporating new functions such as stress and fracture sensing into the structural ceramics without any loss of mechanical properties.",

author = "Oh, \{Sung Tag\} and Mutsuo Sando and Koichi Niihara",

year = "1998",

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T1 - Preparation and properties of alumina/nickel-cobalt alloy nanocomposites

AU - Oh, Sung Tag

AU - Sando, Mutsuo

AU - Niihara, Koichi

PY - 1998/11

Y1 - 1998/11

N2 - High-density nickel-cobalt alloy-dispersed Al2O3 (Al2O3/ Ni-Co alloy) composites were obtained via the hydrogen reduction and hot pressing of Al2O3, Ni(NO3)2·6H2O, and Co(NO3)2·6H2O powder mixtures. Microstructural investigations revealed that nanometer-sized alloy particles were dispersed homogeneously at the matrix grain boundaries, forming the intergranular-type nanocomposite. High strength (>1 GPa) was registered for the Al2O3/10 wt% Ni-Co alloy composite. An inverse magnetostrictive response to applied stress was observed, because of the Ni-Co alloy dispersions, which indicates promise for incorporating new functions such as stress and fracture sensing into the structural ceramics without any loss of mechanical properties.

AB - High-density nickel-cobalt alloy-dispersed Al2O3 (Al2O3/ Ni-Co alloy) composites were obtained via the hydrogen reduction and hot pressing of Al2O3, Ni(NO3)2·6H2O, and Co(NO3)2·6H2O powder mixtures. Microstructural investigations revealed that nanometer-sized alloy particles were dispersed homogeneously at the matrix grain boundaries, forming the intergranular-type nanocomposite. High strength (>1 GPa) was registered for the Al2O3/10 wt% Ni-Co alloy composite. An inverse magnetostrictive response to applied stress was observed, because of the Ni-Co alloy dispersions, which indicates promise for incorporating new functions such as stress and fracture sensing into the structural ceramics without any loss of mechanical properties.

UR - https://www.scopus.com/pages/publications/0032208530

U2 - 10.1111/j.1151-2916.1998.tb02729.x

DO - 10.1111/j.1151-2916.1998.tb02729.x

M3 - Article

AN - SCOPUS:0032208530

SN - 0002-7820

VL - 81

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EP - 3015

JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

IS - 11

ER -

Preparation and properties of alumina/nickel-cobalt alloy nanocomposites

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