화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.25, 5-8, May, 2015
DOI10.1016/j.jiec.2014.10.025  Export Citation
Fracture toughness and surface morphology of Al2O3/Pt composites
Dong-Jin Lee1, Heung-Soap Choi2, Fan-Long Jin3, 4, and Soo-Jin Park4, †
  • 1Nano Technology Inc., 289-20 Daehwa-dong, Daedeok-gu, Daejon 306-801, South Korea
  • 2Department of Mechanical and Design Engineering, Hongik University, Sejong 339-701, Republic of Korea
  • 3Department of Polymer Materials, Jilin Institute of Chemical Technology, Jilin City 132022, People’s Republic of China, Korea
  • 4Department of Chemistry, Inha University, Nam-gu, Incheon 402-751, South Korea
E-mail:
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.
Keywords:Al2O3;Pt;Composites;Fracture toughness;Morphology
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