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Full sintering of powdered-metal bodies in a microwave field

Author

Listed:
  • Rustum Roy

    (Materials Research Laboratory, The Pennsylvania State University)

  • Dinesh Agrawal

    (Materials Research Laboratory, The Pennsylvania State University)

  • Jiping Cheng

    (Materials Research Laboratory, The Pennsylvania State University)

  • Shalva Gedevanishvili

    (Materials Research Laboratory, The Pennsylvania State University)

Abstract

The use of microwaves to process absorbing materials was studied intensively in the 1970s and 1980s, and has now been applied to a wide variety of materials1,2,3,4. Initially, success in microwave heating and sintering was confined mainly to oxide and some non-oxide ceramics5,6,7,8,9,10,11; but recently the technique has been extended to carbide semimetals12,13,14 used in cutting tools. Here we describe the microwave sintering of powdered metals to full density. We are able to sinter a wide range of standard powdered metals from commercial sources using a 2.45-GHz microwave field, yielding dense products with better mechanical properties than those obtained by conventional heating. These findings are surprising in view of the reflectivity of bulk metals at microwave frequencies. The ability to sinter metals with microwaves should assist in the preparation of high-performance metal parts needed in many industries, for example, in the automotive industry.

Suggested Citation

  • Rustum Roy & Dinesh Agrawal & Jiping Cheng & Shalva Gedevanishvili, 1999. "Full sintering of powdered-metal bodies in a microwave field," Nature, Nature, vol. 399(6737), pages 668-670, June.
    • Handle: RePEc:nat:nature:v:399:y:1999:i:6737:d:10.1038_21390
    DOI: 10.1038/21390
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    Cited by:

    1. El Khaled, D. & Novas, N. & Gazquez, J.A. & Manzano-Agugliaro, F., 2018. "Microwave dielectric heating: Applications on metals processing," Renewable and Sustainable Energy Reviews, Elsevier, vol. 82(P3), pages 2880-2892.

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