Finite element modelling of CNT-filled magnesium alloy matrix composites under microwave irradiation

Akeem Damilola Akinwekomi, Man Tik Choy, Wing Cheung Law, Chak Yin Tang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

5 Citations (Scopus)

Abstract

Finite element modelling of a magnesium alloy matrix filled with a 2% volume fraction of carbon nanotubes (CNT) under 2.45 GHz microwave (MW) irradiation is reported. The effective dielectric and permeability data of the simulated compact are evaluated using the effective medium approximation. Subsequently, these values are used to solve Maxwell’s electromagnetic equations followed by the heat conduction equation, thus both the field distribution in the oven cavity and the predicted heating of the model compact are obtained. At an applied power of 1 kW and a 9-minute simulation time, the results show poor coupling between the monolithic metal compact and the MW, resulting in a maximum temperature of ~163 °C. It is in good agreement with earlier studies and theory in which metals did not couple very well with MWs at room temperatures. The model also predicts the temperature in the 2% CNT-filled alloy compact to be 13 °C higher than in the monolithic compact after a similar simulated microwave irradiation duration. Furthermore, the effect of susceptor-assisted microwave heating is investigated by introducing a susceptor kiln into the model. Simulation results predict the temperature of the compact to rise to about 600 °C after 9 minutes, highlighting the importance of susceptor-assisted sintering. The model developed is significant in providing important details for predicting the response of metal compacts and their composites to MW heating as well as further improving the development of MW technology for the production of materials with enhanced properties.
Original languageEnglish
Title of host publicationMetallurgy Technology and Materials IV
PublisherTrans Tech Publications Ltd
Pages83-87
Number of pages5
ISBN (Print)9783038357414
DOIs
Publication statusPublished - 1 Jan 2016
Event4th International Conference on Metallurgy Technology and Materials, ICMTM 2016 - Singapore, Singapore
Duration: 18 Jun 201619 Jun 2016

Publication series

NameMaterials Science Forum
Volume867
ISSN (Print)0255-5476

Conference

Conference4th International Conference on Metallurgy Technology and Materials, ICMTM 2016
Country/TerritorySingapore
CitySingapore
Period18/06/1619/06/16

Keywords

  • Carbon nanotube (CNT)
  • Composite
  • Finite Element Modelling
  • Microwave

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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