Article: Microstructure and mechanical behaviour characterisation of Al-Al2O3 MMC processed by DIMOX and Al-Al2O3/MnO2 MMC processed via stir casting route Journal: International Journal of Materials Engineering Innovation (IJMATEI) 2016 Vol.7 No.3/4 pp.219 - 235 Abstract: In the present study two types of composite were developed - Al-Al2O3 composite by direct metal oxidation (DIMOX) and by reinforcements using both ex situ and in situ approaches together by a dispersing powder mixture of Al2O3 and MnO2 in a ratio of 1:1, through stir casting route in aluminium matrix. Al-Al2O3 composites were synthesised successfully under ambient conditions and it was found that the particles increased as the holding time and the number of stirrings was increased resulting in improved mechanical properties. Generation of Al2O3 particles in the matrix was confirmed by X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) examination. Hence, oxidation, which is known as a major problem in composite preparation by liquid metallurgy route, can be used for preparation of composites and for improving the properties. In Al-Al2O3/MnO2 composites the mechanical properties as well as particle distribution improved as Al2O3 + MnO2 were introduced and also with their increasing weight percent. Inderscience Publishers - linking academia, business and industry through research

Title: Microstructure and mechanical behaviour characterisation of Al-Al₂O₃ MMC processed by DIMOX and Al-Al₂O₃/MnO₂ MMC processed via stir casting route

Authors: Vikas Verma; Prakash Kumar; Kamal Kumar Mittal; Sandeep Chauhan; P.C. Tewari

Addresses: Metallurgical and Materials Engineering Department, IIT Roorkee, 247-667, India ' Mechanical and Industrial Engineering Department, IIT Roorkee, 247667, India ' Mechanical and Industrial Engineering Department, IIT Roorkee, 247667, India ' Department of Mechanical Engineering, NIT, Kurukshetra, 136-119, India ' Department of Mechanical Engineering, NIT, Kurukshetra, 136-119, India

Abstract: In the present study two types of composite were developed - Al-Al₂O₃ composite by direct metal oxidation (DIMOX) and by reinforcements using both ex situ and in situ approaches together by a dispersing powder mixture of Al₂O₃ and MnO₂ in a ratio of 1:1, through stir casting route in aluminium matrix. Al-Al₂O₃ composites were synthesised successfully under ambient conditions and it was found that the particles increased as the holding time and the number of stirrings was increased resulting in improved mechanical properties. Generation of Al₂O₃ particles in the matrix was confirmed by X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) examination. Hence, oxidation, which is known as a major problem in composite preparation by liquid metallurgy route, can be used for preparation of composites and for improving the properties. In Al-Al₂O₃/MnO₂ composites the mechanical properties as well as particle distribution improved as Al₂O₃ + MnO₂ were introduced and also with their increasing weight percent.

Keywords: stir casting; metal matrix composites; direct metal oxidation; DIMOX; reinforcements.

DOI: 10.1504/IJMATEI.2016.084626

International Journal of Materials Engineering Innovation, 2016 Vol.7 No.3/4, pp.219 - 235

Received: 26 Aug 2016
Accepted: 26 Nov 2016
Published online: 19 Jun 2017 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article

Title: Microstructure and mechanical behaviour characterisation of Al-Al2O3 MMC processed by DIMOX and Al-Al2O3/MnO2 MMC processed via stir casting route

Keep up-to-date

Title: Microstructure and mechanical behaviour characterisation of Al-Al₂O₃ MMC processed by DIMOX and Al-Al₂O₃/MnO₂ MMC processed via stir casting route