Boron Nitride Composites By Chemical Vapor Deposition

Journal Article · Tue Jul 01 04:00:00 EDT 1975 · J. Compos. Mater., v. 9, pp. 228-240

DOI:https://doi.org/10.1177/002199837500900302· OSTI ID:4167315

Pierson, H O

Composites of boron nitride (BN) have been made by the chemical vapor deposition (CVD) of a BN matrix on a BN felt fiber substrate. Reactant gases were boron trifluoride and ammonia. The composites have a relatively high density (1.70 g/cm³), a crystallite size L_C = 150 A and an interlayer spacing d₀₀₂ = 3.35 A. Measurements of elastic modulus and thermal conductivity and expansion showed some anisotropy as a result of the preferred fiber orientation of the substrate.

• Research Organization: Sandia Labs., Albuquerque, NM
• Sponsoring Organization: USDOE
• NSA Number: NSA-33-005925
• OSTI ID: 4167315
• Journal Information: J. Compos. Mater., v. 9, pp. 228-240, Journal Name: J. Compos. Mater., v. 9, pp. 228-240; ISSN JCOMB
• Country of Publication: United States
• Language: English

Related Subjects

*BORON NITRIDES-- CHEMICAL VAPOR DEPOSITION
*COMPOSITE MATERIALS-- PHYSICAL PROPERTIES
360201* --Materials--Ceramics
Cermets & Refractories-- Preparation & Fabrication
AMMONIA
ANISOTROPY
BORON FLUORIDES
CRYSTAL STRUCTURE
DENSITY
ELASTICITY
GRAIN ORIENTATION
N50120* --Metals
Ceramics
& Other Materials--Ceramics & Cermets--Preparation & Fabrication
REDUCTION
THERMAL CONDUCTIVITY
THERMAL EXPANSION