Use of CVD AlN films as protective coatings in MoSi{sub 2} composites

Conference · Sun Oct 01 00:00:00 EDT 1995

OSTI ID:100587

Cook, M J; Hudson, J B; Hillig, W B ^[1]

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1. Rensselaer Polytechnic Inst., Troy, NY (United States). Materials Engineering Dept.

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. The authors have developed techniques for coating single crystal sapphire fibers with thin AlN layers, using CVD from an organometallic precursor in a cold wall reactor. Side by side tests of coated and uncoated fibers introduced into a MoSi{sub 2} matrix, either by hot isostatic pressing or by reactive vapor infiltration (RVI), indicate that the coating inhibits both fiber-matrix interdiffusion and volatilization of the fibers by HCl produced in the RVI process.

• OSTI ID: 100587
• Report Number(s): CONF-941144-; ISBN 1-55899-266-9; TRN: 95:019534
• Resource Relation: Conference: Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 28 Nov - 9 Dec 1994; Other Information: PBD: 1995; Related Information: Is Part Of Ceramic matrix composites -- Advanced high-temperature structural materials; Lowden, R.A.; Ferber, M.K. [eds.] [Oak Ridge National Lab., Oak Ridge, TN (United States)]; Hellmann, J.R. [ed.] [Pennsylvania State Univ., University Park, PA (United States). Center for Advanced Materials]; Chawla, K.K. [ed.] [New Mexico Inst. of Mining and Technology, Socorro, NM (United States)]; DiPietro, S.G. [ed.] [Textron Specialty Materials, Lowell, MA (United States)]; PB: 493 p.; Materials Research Society symposium proceedings, Volume 365
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
FABRICATION
MICROSTRUCTURE
SAPPHIRE
PROTECTIVE COATINGS
ALUMINIUM NITRIDES
CHEMICAL VAPOR DEPOSITION
MOLYBDENUM SILICIDES
ORGANOMETALLIC COMPOUNDS
HOT PRESSING
CHEMICAL REACTIONS
SILICON CHLORIDES
HYDROGEN
HYDROCHLORIC ACID
PHOTOELECTRON SPECTROSCOPY
SCANNING ELECTRON MICROSCOPY
INTERFACES
CRACKS