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Improved uniformity of densification of ceramic composites through control of the initial preform porosity distribution

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Abstract

Densification arising from chemical vapor deposition within a porous preform is modeled as a problem in diffusion and reaction. The effect of reaction rate on the nonuniformity of the final densified composite is explored. The possibility of achieving uniform densification by starting with an initially nonuniform porosity distribution is demonstrated with a simulation model. This model permits one to design a densification process from first principles using a simulation tool that yields results on a timescale far less than that of the processing laboratory.

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References

  1. S. M. Gupta and J. A. Tsamopoulis, J. Electrochem. Soc. 136, 555 (1989).

    Article  Google Scholar 

  2. R. Colmet, R. Naslain, P. Hagenmuller, and C. Bernard, ibid., 129, 1367 (1982).

  3. P. Wong and M. Robinson, J. Am. Ceram. Soc. 53, 617 (1970).

    Article  CAS  Google Scholar 

  4. S. Middleman, J. Mater. Res. 4 (6), 1515 (1989).

    Article  CAS  Google Scholar 

  5. T. L. Starr, Ceram. Eng. Sci. Proc. 8, 951 (1987).

    Article  Google Scholar 

  6. H. S. Fogler, Elements of Chemical Reaction Engineering (Prentice-Hall, Englewood Cliffs, NJ, 1986), Chap. 11.

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Authors and Affiliations

  1. Department of AMES/Chemical Engineering, University of California–San Diego, California, 92093, La Jolla, USA

    Stanley Middleman

  2. Process Analysts, Inc., Colorado, 3000 Youngfield Street, 80215, Lakewood, USA

    Brian Heble

  3. Engineering Technology Laboratory, E. I. du Pont de Nemours and Company, Delaware, 19898, Wilmington, USA

    Herman C. T. Cheng

Authors
  1. Stanley Middleman
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  2. Brian Heble
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  3. Herman C. T. Cheng
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Middleman, S., Heble, B. & Cheng, H.C.T. Improved uniformity of densification of ceramic composites through control of the initial preform porosity distribution. Journal of Materials Research 5, 1544–1548 (1990). https://doi.org/10.1557/JMR.1990.1544

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  • DOI: https://doi.org/10.1557/JMR.1990.1544

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