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Title: Microwave combustion synthesis of in situ Al{sub 2}O{sub 3} and Al{sub 3}Zr reinforced aluminum matrix composites

Al{sub 2}O{sub 3} and Al{sub 3}Zr reinforced aluminum matrix composites were fabricated from Al and ZrO{sub 2} powders by SiC assisted microwave combustion synthesis. The microstructure and reaction pathways were analyzed by using differential scanning calorimetry (DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS). The results showed that the heating rate during microwave synthesis was very high and the entire process took several minutes and that the ignition temperature of the reaction was much lower than that of conventional methods. In addition, the resulting microstructure was found to be finer than that prepared by the conventional methods and no cracks can be seen in the Al{sub 3}Zr reinforcements. As such, the newly developed composites have potential for safety-critical applications where catastrophic failure is not tolerated.
Authors:
 [1] ;  [2] ;  [2] ; ; ; ;  [1] ;  [3] ;  [4]
  1. College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094 (China)
  2. (China)
  3. School of Mechanical & Electrical Engineering, Wuhan Institute of Technology, Wuhan 430073 (China)
  4. (Australia)
Publication Date:
OSTI Identifier:
22475856
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 68; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM COMPOUNDS; ALUMINIUM OXIDES; CALORIMETRY; COMBUSTION; COMPOSITE MATERIALS; FAILURES; MICROSTRUCTURE; MICROWAVE RADIATION; POWDERS; SCANNING ELECTRON MICROSCOPY; SILICON CARBIDES; SPECTROSCOPY; SYNTHESIS; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION; ZIRCONIUM COMPOUNDS; ZIRCONIUM OXIDES