Microwave curing of carbon–epoxy composites: Penetration depth and material characterisation

Abstract Microwave heating has several major advantages over conventional conductive heating when used to cure carbon–epoxy composites, especially in speed of processing. Despite this and many other well-known advantages, microwave heating of carbon–epoxy composites has not taken off in industry, or even academia, due to the problems associated with microwave energy distribution, arcing, tool design and (ultimately) part quality and consistency, thus leading to a large scepticism regarding the technique/technology for heating such type of materials. This paper presents some evidence which suggests that with the correct hardware and operating procedure/methodology, consistent and high quality carbon–epoxy laminates can be produced, with the possibility of scaling up the process, as demonstrated by the micro- and macro-scale mechanical test results. Additionally, the author proposes a methodology to practically measure the maximum microwave penetration depth of a carbon–epoxy composite material.

[1]  Brian J. Briscoe,et al.  Nano-indentation of polymeric surfaces , 1998 .

[2]  M. Hawley,et al.  Kinetics modeling and time‐temperature‐transformation diagram of microwave and thermal cure of epoxy resins , 1995 .

[3]  M. Hawley,et al.  Comparison of microwave and thermal cure of epoxy resins , 1993 .

[4]  S. Bai,et al.  Viscoelastic properties of nanosilica‐filled epoxy composites investigated by dynamic nanoindentation , 2009 .

[5]  A. Kelly,et al.  Tensile properties of fibre-reinforced metals: Copper/tungsten and copper/molybdenum , 1965 .

[6]  L. Drzal,et al.  Effects of Microwave Processing on Fiber-matrix Adhesion in Composites , 1989 .

[7]  S. Bai,et al.  Interfacial properties of microwave cured composites , 1995 .

[8]  Gennaro Cuccurullo,et al.  IR temperature measurements in microwave heating , 2002 .

[9]  M. Andreani,et al.  A comparative study of the mechanical behaviour of an epoxy resin cured by microwaves with one cured thermally , 1995 .

[10]  Emile S. Greenhalgh,et al.  Failure Analysis and Fractography of Polymer Composites , 2009 .

[11]  A. C. Metaxas,et al.  Industrial Microwave Heating , 1988 .

[12]  M. Hawley,et al.  Microwave processing of crossply continuous graphite fiber/epoxy composites , 1991 .

[13]  N. J. Johnston,et al.  Matrix Resin Effects in Composite Delamination: Mode I Fracture Aspects , 1987 .

[14]  R. Day,et al.  Flexural and interlaminar shear strength properties of carbon fibre/epoxy composites cured thermally and with microwave radiation , 2002 .

[15]  E. Siochi,et al.  Basic ideas of microwave processing of polymers , 1993 .

[16]  M. Hiley.  Fractographic study of static and fatigue failures in polymer composites , 1999 .

[17]  R. Day,et al.  Comparison of the mechanical and physical properties of a carbon fibre epoxy composite manufactured by resin transfer moulding using conventional and microwave heating , 2008 .

[18]  Gennaro Cuccurullo,et al.  A procedure to measure electromagnetic skin depth in microwave heating , 2004 .

[19]  Johan Liu,et al.  A review of microwave curing of polymer materials , 2000 .

[20]  George S. Springer,et al.  Microwave Curing of Composites , 1984 .

[21]  Jovan Mijovic,et al.  Review of cure of polymers and composites by microwave energy , 1990 .

[22]  Motofumi Ohki,et al.  Proposal for ISO 14577 : Metallic materials : Instrumented Indentation Test for Hardness and Materials Parameters (Part 1) Test Method (3rd. Influence on Computed Young's Modulus by Different Indenter's Tip Profile and Material Property (小特集 微小部および微小部材の評価技術) , 2012 .

[23]  S. Kazarian,et al.  Mapping local microstructure and mechanical performance around carbon nanotube grafted silica fibres: methodologies for hierarchical composites. , 2011, Nanoscale.

[24]  W. C. White.  Early History of Industrial Electronics , 1962, Proceedings of the IRE.

[25]  E. Marand,et al.  Comparison of reaction mechanisms of epoxy resins undergoing thermal and microwave cure from in situ measurements of microwave dielectric properties and infrared spectroscopy , 1992 .