Title :
Gyrotron beam heating of ceramic coatings and joints
Author :
Fliflet, Arne W. ; Gold, Steven H. ; Fischer, R.P. ; Kinkead, A.K. ; Miserendino, S. ; Lewis, D. ; Kurihara, L.K.
Author_Institution :
Div. of Plasma Phys., Naval Res. Lab., Washington, DC, USA
Abstract :
Summary form only given. A focussed Gaussian beam generated by an 83-GHz, 15-kW CW Gycom, Ltd. gyrotron is being applied to the processing of ceramic materials at the Naval Research Laboratory. Available microwave power densities of >1 kW/cm2 enable rapid, localized heating of ceramic coatings and joints, provided adequate microwave-material coupling is achieved. This paper describes theoretical and experimental studies of microwave beam coupling to and propagation in multi-component ceramic systems corresponding to joints and coating configurations. Localized coupling enhancement using mixtures of ceramic and metal powders has been investigated. Techniques for minimization of reflection (important in a single-pass beam system) and beam polarization effects will be discussed, as well as the results of experiments designed to enhance heating rates based on these effects.
Keywords :
ceramics; gyrotrons; materials preparation; microwave heating; powder technology; 15 kW; 83 GHz; CW gyrotron; beam polarization effects; ceramic coatings; ceramic materials; ceramic-metal powder mixtures; focussed Gaussian beam; gyrotron beam heating; heating rate enhancements; joints; localized coupling enhancement; localized heating; materials processing; microwave beam coupling; microwave-material coupling; minimization; multi-component ceramic systems; Ceramics; Coatings; Electromagnetic heating; Gyrotrons; Laboratories; Microwave propagation; Optical coupling; Optical reflection; Polarization; Powders;
Conference_Titel :
Pulsed Power Plasma Science, 2001. IEEE Conference Record - Abstracts
Conference_Location :
Las Vegas, NV, USA
Print_ISBN :
0-7803-7141-0
DOI :
10.1109/PPPS.2001.961244
