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Use of CVD Ain Films as Protective Coatings in MoSi2 Composites

Published online by Cambridge University Press:  15 February 2011

Mark J. Cook ,
John B. Hudson  and
William B. Hillig
Mark J. Cook
Affiliation:
Materials Engineering Department, Rensselaer Polytechnic Institute, Troy, NY 12180
John B. Hudson
Affiliation:
Materials Engineering Department, Rensselaer Polytechnic Institute, Troy, NY 12180
William B. Hillig
Affiliation:
Materials Engineering Department, Rensselaer Polytechnic Institute, Troy, NY 12180
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Abstract

In many fiber reinforced composite systems, protective coatings on the fibers are required in order to protect the fiber from reaction with the matrix, to modify the mechanical properties of the fiber-matrix interface, or to protect the fiber during processing steps such as chemical vapor infiltration. We have developed techniques for coating single crystal sapphire fibers with thin AIN layers, using CVD from an organometallic precursor in a cold wall reactor. Side by side tests of coated and uncoated fibers introduced into a MoSi2 matrix, either by hot isostatic pressing or by reactive vapor infiltration (RVI), indicate that the coating inhibits both fibermatrix interdiffusion and volatilization of the fibers by HC1 produced in the RVI process.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 365: Symposium M – Ceramic Matrix Composites–Advanced High-Temperature Structural Materials , 1994 , 457
Copyright
Copyright © Materials Research Society 1995

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References

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