Microwave versus conventional sintering of silicon carbide tiles

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Description

Silicon carbide is being evaluated as an armor material because of its lightweight, high-hardness, and excellent armor efficiency. However, one of the problems associated with silicon carbide is the high cost associated with achieving fully dense tiles. Full density requires either hot pressing and sintering or reaction bonding. Past efforts have shown that hot pressed tiles have a higher armor efficiency than those produced by reaction bonded sintering. An earlier stuy showed that the acoustic properties of fully-dense silicon carbide tiles were enhanced through the use of post-sintered microwave heat treatments. One of the least expensive forming techniques is to ... continued below

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10 p.

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Kass, M. D.; Caughman, J. B. O.; Forrester, S. C. & Akerman, A. May 7, 1997.

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Description

Silicon carbide is being evaluated as an armor material because of its lightweight, high-hardness, and excellent armor efficiency. However, one of the problems associated with silicon carbide is the high cost associated with achieving fully dense tiles. Full density requires either hot pressing and sintering or reaction bonding. Past efforts have shown that hot pressed tiles have a higher armor efficiency than those produced by reaction bonded sintering. An earlier stuy showed that the acoustic properties of fully-dense silicon carbide tiles were enhanced through the use of post-sintered microwave heat treatments. One of the least expensive forming techniques is to isostatically press-and-sinter. In this study, the authors have used microwave energy to densify silicon carbide green bodies. Microwave sintering has been demonstrated to be a very quick way to sinter ceramics such as alumina to exceptionally high densities. Previous work has shown that microwave post treatment of fully-dense reaction bonded silicon carbide tiles significantly improves the acoustic properties of the tiles. These properties include Poisson`s ratio, Young`s modulus, shear modulus, and bulk modulus.

Physical Description

10 p.

Notes

OSTI as DE98054839

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  • Other Information: PBD: 7 May 1997

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  • Other: DE98054839
  • Report No.: ORNL/TM--13439
  • Grant Number: AC05-96OR22464
  • DOI: 10.2172/661631 | External Link
  • Office of Scientific & Technical Information Report Number: 661631
  • Archival Resource Key: ark:/67531/metadc708246

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  • May 7, 1997

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • Feb. 15, 2016, 4:23 p.m.

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Kass, M. D.; Caughman, J. B. O.; Forrester, S. C. & Akerman, A. Microwave versus conventional sintering of silicon carbide tiles, report, May 7, 1997; Tennessee. (digital.library.unt.edu/ark:/67531/metadc708246/: accessed October 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.