Ceramic matrix composites by microwave assisted CVI

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Chemical vapor infiltration (CVI) processes for producing continuously reinforced ceramic composites are reviewed. The potential advantages of microwave assisted CVI are noted. Recent numerical studies of microwave assisted CVI are then reviewed. These studies predict inverted thermal gradients in fibrous ceramic preforms subjected to microwave radiation and suggest processing strategies for achieving uniformly dense composites. Comparisons are made to experimental results obtained using silicon based composite systems. The importance of microwave-material interactions is stressed. In particular, emphasis is placed on the role played by the relative ability of fiber and matrix to dissipate microwave energy. Results suggest that microwave induced ... continued below

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11 p.

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Currier, R. P. & Devlin, D. J. May 1, 1993.

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Description

Chemical vapor infiltration (CVI) processes for producing continuously reinforced ceramic composites are reviewed. The potential advantages of microwave assisted CVI are noted. Recent numerical studies of microwave assisted CVI are then reviewed. These studies predict inverted thermal gradients in fibrous ceramic preforms subjected to microwave radiation and suggest processing strategies for achieving uniformly dense composites. Comparisons are made to experimental results obtained using silicon based composite systems. The importance of microwave-material interactions is stressed. In particular, emphasis is placed on the role played by the relative ability of fiber and matrix to dissipate microwave energy. Results suggest that microwave induced inverted gradients can in fact be exploited using the CVI technique to promote inside-out densification.

Physical Description

11 p.

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OSTI; NTIS; GPO Dep.

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  • 95. annual meeting of the American Ceramic Society,Cincinnati, OH (United States),18-22 Apr 1993

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  • Other: DE93012640
  • Report No.: LA-UR--93-1322
  • Report No.: CONF-930438--14
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 10156738
  • Archival Resource Key: ark:/67531/metadc1312052

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Office of Scientific & Technical Information Technical Reports

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  • May 1, 1993

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  • Nov. 3, 2018, 11:47 a.m.

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  • Nov. 13, 2018, 1:01 p.m.

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Currier, R. P. & Devlin, D. J. Ceramic matrix composites by microwave assisted CVI, article, May 1, 1993; New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc1312052/: accessed March 24, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.