Chemical vapor infiltration rates of ZrO2 into MoSi2 porous bodies and comparison with model calculation

Noboru Yoshikawa, James W. Evans

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Zirconia (ZrO2) was chemical vapor infiltrated (CVI) into a partially sintered MoSi2 body (preform) by using zirconium n-propoxide (Zr(OC3H7)4) as a gas precursor. Infiltration distances at different conditions were compared with the calculated results. Chemical vapor deposition (CVD) film growth rates of ZrO2 were measured, and the data were incorporated into the model calculations. Two models were used to analyze the observed infiltration distances. Initially a conventional model assuming a pore with constant radius (SP model) was used. With this model, it was possible to predict the approximate infiltration distance. However, the model cannot predict pore closure and the infiltration distances for a variety of CVI conditions. Secondly, a newly proposed model (PC model) from a previous paper was applied to calculate the infiltration distance. Using this model, it was possible to predict the occurrence of pore closure or the formation of the deposition layer on the perform surface.

Original languageEnglish
Pages (from-to)1477-1484
Number of pages8
JournalJournal of the American Ceramic Society
Issue number6
Publication statusPublished - 2002 Jun

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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