Microwave sintering, brazing and melting of metallic materials

Dinesh Kumar Agrawal

Research output: Chapter in Book/Report/Conference proceedingConference contribution

45 Scopus citations

Abstract

Microwave energy has been in use for variety of applications for over 50 years. These applications include communication, food processing, wood drying, rubber vulcanization, medical therapy, polymers, etc. In the last two decades microwave heating has been also applied very effectively and efficiently to heat and sinter ceramic materials. Microwave heating is recognized for its various advantages, such as: time and energy saving, very rapid heating rates, considerably reduced processing cycle time and temperature, fine microstructures and improved mechanical properties, better product performance, etc. The most recent application of microwaves has been in the field of metallic materials for sintering, brazing/joining and melting. Several common steel compositions, pure metals and refractory metals have been sintered in microwaves to nearly full density with improved mechanical properties. Many commercial powder-metal components of various alloy compositions including iron and steel, copper, aluminum, nickel, Mo, Co, Ti, W, Sn, etc., and their alloys have also been sintered in microwaves producing better properties than their conventional counterparts by using a 2.45 GHz multimode microwave system. This work has been further extended to join and braze bulk metal pieces, especially super alloy based turbine blades. Further, in a specially designed microwave cavity, even the bulk metals can be made to couple with the microwave field and melted. The implications of these findings are obvious in the field of powder metal technology.

Original languageEnglish (US)
Title of host publicationSohn International Symposium
Subtitle of host publicationAdvanced Processing of Metals and Materials - Proceedings of the International Symposium
Pages183-192
Number of pages10
Volume4
StatePublished - Dec 1 2006
Event2006 TMS Fall Extraction and Processing Division: Sohn International Symposium - San Diego, CA, United States
Duration: Aug 27 2006Aug 31 2006

Other

Other2006 TMS Fall Extraction and Processing Division: Sohn International Symposium
CountryUnited States
CitySan Diego, CA
Period8/27/068/31/06

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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  • Cite this

    Agrawal, D. K. (2006). Microwave sintering, brazing and melting of metallic materials. In Sohn International Symposium: Advanced Processing of Metals and Materials - Proceedings of the International Symposium (Vol. 4, pp. 183-192)