Processing and properties of copper dispersed alumina matrix nanocomposites

Sung Tag Oh; Mutsuo Sando; Tohru Sekino; Koichi Niihara

doi:10.1016/S0965-9773(98)00064-6

Processing and properties of copper dispersed alumina matrix nanocomposites

Sung Tag Oh, Mutsuo Sando, Tohru Sekino, Koichi Niihara

Dept. of Materials Science & Engineering

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

25 Scopus citations

Abstract

An optimum route to fabricate Al₂O₃/Cu composites with sound microstructure and desired mechanical properties was investigated. The Al₂O₃ matrix composites with Cu content of 2.5 to 10 vol.% were prepared by reduction and hot-pressing of Al₂O₃/CuO powder mixtures. Homogeneous microstructures with nanosized Cu dispersoids and improved fracture strength of 820 MPa could be achieved in the composites with Cu content of 2.5 and 5 vol.%. The influence of the Cu content upon the mechanical properties is discussed based on the observed microstructural characteristics. The toughness increase is explained by crack bridging. The strengthening is mainly attributed to the refinement of Al₂O₃ matrix grains by the nano-sized Cu dispersion.

Original language	English
Pages (from-to)	267-272
Number of pages	6
Journal	Nanostructured Materials
Volume	10
Issue number	2-8
DOIs	https://doi.org/10.1016/S0965-9773(98)00064-6
State	Published - Feb 1998

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title = "Processing and properties of copper dispersed alumina matrix nanocomposites",

abstract = "An optimum route to fabricate Al2O3/Cu composites with sound microstructure and desired mechanical properties was investigated. The Al2O3 matrix composites with Cu content of 2.5 to 10 vol.\% were prepared by reduction and hot-pressing of Al2O3/CuO powder mixtures. Homogeneous microstructures with nanosized Cu dispersoids and improved fracture strength of 820 MPa could be achieved in the composites with Cu content of 2.5 and 5 vol.\%. The influence of the Cu content upon the mechanical properties is discussed based on the observed microstructural characteristics. The toughness increase is explained by crack bridging. The strengthening is mainly attributed to the refinement of Al2O3 matrix grains by the nano-sized Cu dispersion.",

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

year = "1998",

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doi = "10.1016/S0965-9773(98)00064-6",

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journal = "Nanostructured Materials",

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T1 - Processing and properties of copper dispersed alumina matrix nanocomposites

AU - Oh, Sung Tag

AU - Sando, Mutsuo

AU - Sekino, Tohru

AU - Niihara, Koichi

PY - 1998/2

Y1 - 1998/2

N2 - An optimum route to fabricate Al2O3/Cu composites with sound microstructure and desired mechanical properties was investigated. The Al2O3 matrix composites with Cu content of 2.5 to 10 vol.% were prepared by reduction and hot-pressing of Al2O3/CuO powder mixtures. Homogeneous microstructures with nanosized Cu dispersoids and improved fracture strength of 820 MPa could be achieved in the composites with Cu content of 2.5 and 5 vol.%. The influence of the Cu content upon the mechanical properties is discussed based on the observed microstructural characteristics. The toughness increase is explained by crack bridging. The strengthening is mainly attributed to the refinement of Al2O3 matrix grains by the nano-sized Cu dispersion.

AB - An optimum route to fabricate Al2O3/Cu composites with sound microstructure and desired mechanical properties was investigated. The Al2O3 matrix composites with Cu content of 2.5 to 10 vol.% were prepared by reduction and hot-pressing of Al2O3/CuO powder mixtures. Homogeneous microstructures with nanosized Cu dispersoids and improved fracture strength of 820 MPa could be achieved in the composites with Cu content of 2.5 and 5 vol.%. The influence of the Cu content upon the mechanical properties is discussed based on the observed microstructural characteristics. The toughness increase is explained by crack bridging. The strengthening is mainly attributed to the refinement of Al2O3 matrix grains by the nano-sized Cu dispersion.

UR - https://www.scopus.com/pages/publications/0031988514

U2 - 10.1016/S0965-9773(98)00064-6

DO - 10.1016/S0965-9773(98)00064-6

M3 - Article

AN - SCOPUS:0031988514

SN - 0965-9773

VL - 10

SP - 267

EP - 272

JO - Nanostructured Materials

JF - Nanostructured Materials

IS - 2-8

ER -

Processing and properties of copper dispersed alumina matrix nanocomposites

Abstract

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