Microwave processing of adhesive joints using a temperature controlled feedback system

Ayodele Olofinjana; P K D V Yarlagadda; A Oloyede

doi:10.1016/S0890-6955(00)00060-2

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Journal article

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Microwave processing of adhesive joints using a temperature controlled feedback system

Ayodele Olofinjana, P K D V Yarlagadda and A Oloyede

International Journal of Machine Tools and Manufacture, Vol.41(2), pp.209-225

2001

DOI: https://doi.org/10.1016/S0890-6955(00)00060-2

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Abstract

Manufacturing Engineering

microwave heating

adhesive curing

temperature-based control

Previous experiments have shown that microwave curing of epoxies reduces the curing time and could lead to improvements in the mechanical properties of the cured epoxies. Precise temperature control is important as inadequate control may lead to thermal `run-away', resulting in localized material damage. Consequently, the main objective of the present work is to use temperature for controlling the intensity of microwave radiation during the adhesive curing process. Using microwave energy delivered through a slotted waveguide at a frequency of 2.45 GHz, and with the power varied between 300 and 600 W, three engineering thermoplastics or adherends were joined by curing two types of `two-pack' epoxy adhesives. Subsequently, the bond strengths of the microwave cured samples were compared to those of the specimens cured in ambient conditions by subjecting the joined samples to shear loading. The results obtained indicate that the samples cured with microwave under a temperature feedback control protocol achieved higher bond strengths after curing for only a fraction of the time required for ambient curing. It can therefore be inferred that, with an adequate temperature control strategy, increased efficiency of curing, higher quality of adhesive joint, and improved bond strength can be achieved when joining thermoplastics.

Details

Title: Microwave processing of adhesive joints using a temperature controlled feedback system
Authors: Ayodele Olofinjana (Author) - Queensland University of Technology
P K D V Yarlagadda (Author) - Queensland University of Technology
A Oloyede (Author) - Queensland University of Technology
Publication details: International Journal of Machine Tools and Manufacture, Vol.41(2), pp.209-225
Publisher: Elsevier Inc.
Date published: 2001
DOI: 10.1016/S0890-6955(00)00060-2
ISSN: 0890-6955
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
Language: English
Record Identifier: 99448953202621
Output Type: Journal article

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Web Of Science research areas: Engineering, Manufacturing; Engineering, Mechanical