Fracture toughness and surface morphology of Al2O3/Pt composites

Dong Jin Lee; Heung Soap Choi; Fan Long Jin; Soo Jin Park

doi:10.1016/j.jiec.2014.10.025

Fracture toughness and surface morphology of Al₂O₃/Pt composites

Dong Jin Lee, Heung Soap Choi, Fan Long Jin, Soo Jin Park

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

3 Scopus citations

Abstract

In the present study, Al₂O₃-based composites with dispersed Pt particles were prepared by using a reduction-precipitation method. Particle distribution, fracture toughness, and morphology of the prepared Al₂O₃/Pt composites were studied. Crystal structure of the composites was evaluated by analyzing Pt characteristic peaks in the X-ray diffraction spectra. Transmission electron microscopy images indicated that the Pt particles were uniformly dispersed in the Al₂O₃ powder. The fracture toughness of the Al₂O₃ matrix was improved by the addition of Pt particles, since these particles effectively resisted crack propagation in the Al₂O₃/Pt composites. Scanning electron microscopy images indicated that the fracture of the composites followed an intergranular mechanism, typical of ceramic materials, at low Pt content, whereas a transgranular mechanism occurred at high Pt content.

Original language	English
Pages (from-to)	5-8
Number of pages	4
Journal	Journal of Industrial and Engineering Chemistry
Volume	25
DOIs	https://doi.org/10.1016/j.jiec.2014.10.025
State	Published - 25 May 2015

Bibliographical note

Publisher Copyright:
© 2014 The Korean Society of Industrial and Engineering Chemistry.

Keywords

AlO
Composites
Fracture toughness
Morphology
Pt

Access to Document

10.1016/j.jiec.2014.10.025

Cite this

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title = "Fracture toughness and surface morphology of Al2O3/Pt composites",

abstract = "In the present study, Al2O3-based composites with dispersed Pt particles were prepared by using a reduction-precipitation method. Particle distribution, fracture toughness, and morphology of the prepared Al2O3/Pt composites were studied. Crystal structure of the composites was evaluated by analyzing Pt characteristic peaks in the X-ray diffraction spectra. Transmission electron microscopy images indicated that the Pt particles were uniformly dispersed in the Al2O3 powder. The fracture toughness of the Al2O3 matrix was improved by the addition of Pt particles, since these particles effectively resisted crack propagation in the Al2O3/Pt composites. Scanning electron microscopy images indicated that the fracture of the composites followed an intergranular mechanism, typical of ceramic materials, at low Pt content, whereas a transgranular mechanism occurred at high Pt content.",

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AU - Lee, Dong Jin

AU - Choi, Heung Soap

AU - Jin, Fan Long

AU - Park, Soo Jin

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AB - In the present study, Al2O3-based composites with dispersed Pt particles were prepared by using a reduction-precipitation method. Particle distribution, fracture toughness, and morphology of the prepared Al2O3/Pt composites were studied. Crystal structure of the composites was evaluated by analyzing Pt characteristic peaks in the X-ray diffraction spectra. Transmission electron microscopy images indicated that the Pt particles were uniformly dispersed in the Al2O3 powder. The fracture toughness of the Al2O3 matrix was improved by the addition of Pt particles, since these particles effectively resisted crack propagation in the Al2O3/Pt composites. Scanning electron microscopy images indicated that the fracture of the composites followed an intergranular mechanism, typical of ceramic materials, at low Pt content, whereas a transgranular mechanism occurred at high Pt content.

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