A Numerical and Experimental Investigation of the Microwave Heating of Polymer Materials Inside a Ridge Waveguide

Liu, F.; Turner, Ian; Σιώρης, Ηλίας; Groombridge, Paul

doi:10.1080/08327823.1996.11688297

Cited by 34 publications

(29 citation statements)

References 8 publications

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“…This is accomplished using preselected bandwidth sweeping around a central frequency employing tunable sources such as travelling wave tubes as the microwave power amplifier. Selective heating of complex samples and industrial scale-up are now viable [7,8]. At the heart of the VFM technology is a high power, broadband, helix travelling wave tube (TWT), which has been used in the VFM furnace (VFMF) constructed to date [9].…”

Section: Variable Frequency Microwaves (Vfm)mentioning

confidence: 99%

Processing of Composites Using Variable and Fixed Frequency Microwave Facilities

Ku¹,

Yusaf²

2008

PIER B

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Abstract-This paper starts with the characteristics and advantages of microwaves processing. The shortcomings of fixed frequency, typically at 2.45 GHz were also mentioned. On account of this, the newly developed variable frequency microwave (VFM) fabrication was mentioned and adopted in place of the fixed frequency process. Two cases of fixed frequency microwave processing of materials were described; the characteristics and pros of each case was mentioned and commented. Two cases of processing materials using variable frequency microwave facility (VFMF) were mentioned; the advantages and limitations of each case were discussed. The microwave processing of materials provides improved mechanical, physical and electrical properties with much reduced processing time. Furthermore, variable frequency microwave processing is more superior to its fixed frequency counterpart except that the cost of the facilities of the former is much higher than the latter at this point in time but it appears that the price will drop in the coming ten years.

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Section: Variable Frequency Microwaves (Vfm)mentioning

confidence: 99%

Processing of Composites Using Variable and Fixed Frequency Microwave Facilities

Ku¹,

Yusaf²

2008

PIER B

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“…If the mechanical properties of the composites cured under microwave conditions was up to 95% or more than that cured under ambient conditions, microwave treatment can then be used in curing large vinyl ester particulate composites. By this way, not only the shrinkage problem will be solved but also the production time can be shortened [2,10]. This will eventually lower the production costs of vinyl ester particulate composites.…”

mentioning

confidence: 99%

Young's Modulus of Vinyl Ester Composites Cured by Microwave Irradiation: Preliminary Results

Ku¹,

Puttgunta²,

Trada³

2006

Journal of Electromagnetic Waves and Applications

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Abstract:The shrinkage of vinyl ester particulate composites has been reduced by curing the resins under microwave conditions. The reduction in the shrinkage of the resins by microwaves will enable the manufacture of large vinyl ester composite items possible [1][2][3][4]. The difference in impact strength between microwave cured vinyl ester particulate composites and those cured under ambient conditions had been investigated and found to be minimal [5]. In addition, a previous study found that the difference in fracture toughness obtained by short bar method between selected microwave-condition cured vinyl ester particulate composites and those cured under ambient conditions was only 0.5% [6]. This project is to investigate the difference in Young's modulus, ultimate tensile strength and yield strength between microwave cured vinyl ester particulate composites and those cured under ambient conditions.The results show that the difference in the Young's modulus is minimal.

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“…However, the uneven temperature distribution and hot spots of electromagnetic in fixed-frequency microwave are often problematic [86], which restricted the composite parts performance and quality. Recently, Variable Frequency Microwave (VFM) technologies for material processing have been developed and alleviated the non-uniform heating in microwave processing.…”

Section: Variable Frequency Microwave Curing Technologiesmentioning

confidence: 99%

Tooling design and microwave curing technologies for the manufacturing of fiber-reinforced polymer composites in aerospace applications

Gao

2013

Int J Adv Manuf Technol

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A Numerical and Experimental Investigation of the Microwave Heating of Polymer Materials Inside a Ridge Waveguide

Cited by 34 publications

References 8 publications

Processing of Composites Using Variable and Fixed Frequency Microwave Facilities

Processing of Composites Using Variable and Fixed Frequency Microwave Facilities

Young's Modulus of Vinyl Ester Composites Cured by Microwave Irradiation: Preliminary Results

Tooling design and microwave curing technologies for the manufacturing of fiber-reinforced polymer composites in aerospace applications

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