Fabrication of Al2O3/5 vol% Cu nanocomposites using various powder mixtures and its properties

Sung Tag Oh; Yong Ho Choa; Young Do Kim

Fabrication of Al₂O₃/5 vol% Cu nanocomposites using various powder mixtures and its properties

Sung Tag Oh
, Yong Ho Choa
, Young Do Kim

Dept. of Materials Science & Engineering

Hanyang University

Research output: Contribution to journal › Conference article › peer-review

Abstract

An optimum route to fabricate the Al₂O₃/Cu nanocomposites with sound microstructure and improved mechanical properties was investigated. Three powder mixtures of Al₂O₃ and Cu, CuO or Cu-nitrate were used to obtain Al₂O₃/5 vol% Cu composites. Microstructural investigations for the composite from Al ₂O₃-nitrate showed that fine Cu particles, about 150 nm in diameter, were homogeneously distributed within the Al₂O₃ matrix grains and at the grain boundaries. Fracture toughness of 4.8 MPa√m and strength of 953 MPa were measured for the A₂O ₃/5 vol% Cu nanocomposites prepared from Al₂O ₃-nitrate mixture. The toughening and strengthening of the composites are explained by the crack bridging/deflection and the refinement of the microstructure, respectively.

Original language	English
Pages (from-to)	1213-1216
Number of pages	4
Journal	Materials Science Forum
Volume	449-452
Issue number	II
State	Published - 2004
Event	Designing, Processing and Properties of Advanced Engineering Materials: Proceedings on the 3rd International Symposium on Designing, Processing and Properties of Advanced Engineering Materials - Jeju Island, Korea, Republic of Duration: 5 Nov 2003 → 8 Nov 2003

Keywords

Mechanical properties
Microstructure
Nanocomposites
Powder processing

Cite this

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title = "Fabrication of Al2O3/5 vol\% Cu nanocomposites using various powder mixtures and its properties",

abstract = "An optimum route to fabricate the Al2O3/Cu nanocomposites with sound microstructure and improved mechanical properties was investigated. Three powder mixtures of Al2O3 and Cu, CuO or Cu-nitrate were used to obtain Al2O3/5 vol\% Cu composites. Microstructural investigations for the composite from Al 2O3-nitrate showed that fine Cu particles, about 150 nm in diameter, were homogeneously distributed within the Al2O3 matrix grains and at the grain boundaries. Fracture toughness of 4.8 MPa√m and strength of 953 MPa were measured for the A2O 3/5 vol\% Cu nanocomposites prepared from Al2O 3-nitrate mixture. The toughening and strengthening of the composites are explained by the crack bridging/deflection and the refinement of the microstructure, respectively.",

keywords = "Mechanical properties, Microstructure, Nanocomposites, Powder processing",

author = "Oh, \{Sung Tag\} and Choa, \{Yong Ho\} and Kim, \{Young Do\}",

year = "2004",

language = "English",

volume = "449-452",

pages = "1213--1216",

journal = "Materials Science Forum",

issn = "0255-5476",

number = "II",

note = "Designing, Processing and Properties of Advanced Engineering Materials: Proceedings on the 3rd International Symposium on Designing, Processing and Properties of Advanced Engineering Materials ; Conference date: 05-11-2003 Through 08-11-2003",

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TY - JOUR

T1 - Fabrication of Al2O3/5 vol% Cu nanocomposites using various powder mixtures and its properties

AU - Oh, Sung Tag

AU - Choa, Yong Ho

AU - Kim, Young Do

PY - 2004

Y1 - 2004

N2 - An optimum route to fabricate the Al2O3/Cu nanocomposites with sound microstructure and improved mechanical properties was investigated. Three powder mixtures of Al2O3 and Cu, CuO or Cu-nitrate were used to obtain Al2O3/5 vol% Cu composites. Microstructural investigations for the composite from Al 2O3-nitrate showed that fine Cu particles, about 150 nm in diameter, were homogeneously distributed within the Al2O3 matrix grains and at the grain boundaries. Fracture toughness of 4.8 MPa√m and strength of 953 MPa were measured for the A2O 3/5 vol% Cu nanocomposites prepared from Al2O 3-nitrate mixture. The toughening and strengthening of the composites are explained by the crack bridging/deflection and the refinement of the microstructure, respectively.

AB - An optimum route to fabricate the Al2O3/Cu nanocomposites with sound microstructure and improved mechanical properties was investigated. Three powder mixtures of Al2O3 and Cu, CuO or Cu-nitrate were used to obtain Al2O3/5 vol% Cu composites. Microstructural investigations for the composite from Al 2O3-nitrate showed that fine Cu particles, about 150 nm in diameter, were homogeneously distributed within the Al2O3 matrix grains and at the grain boundaries. Fracture toughness of 4.8 MPa√m and strength of 953 MPa were measured for the A2O 3/5 vol% Cu nanocomposites prepared from Al2O 3-nitrate mixture. The toughening and strengthening of the composites are explained by the crack bridging/deflection and the refinement of the microstructure, respectively.

KW - Mechanical properties

KW - Microstructure

KW - Nanocomposites

KW - Powder processing

UR - https://www.scopus.com/pages/publications/18544403840

M3 - Conference article

AN - SCOPUS:18544403840

SN - 0255-5476

VL - 449-452

SP - 1213

EP - 1216

JO - Materials Science Forum

JF - Materials Science Forum

IS - II

T2 - Designing, Processing and Properties of Advanced Engineering Materials: Proceedings on the 3rd International Symposium on Designing, Processing and Properties of Advanced Engineering Materials

Y2 - 5 November 2003 through 8 November 2003

ER -

Fabrication of Al₂O₃/5 vol% Cu nanocomposites using various powder mixtures and its properties

Abstract

Keywords

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