Accession Number : ADA019437
Title : Crystalline Structure of Pyrocarbon Film Deposited on Pyrolytic Boron Nitride.
Descriptive Note : Interim technical rept.,
Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF MATERIALS SCIENCES LAB
Personal Author(s) : Wachi,Francis M. ; Whittaker,Arthur G. ; Watts,Ethel J.
Report Date : 04 DEC 1975
Pagination or Media Count : 14
Abstract : Transmission electron diffraction data have indicated that the pyrocarbon films deposited on pyrolytic boron nitride consist of a mixture of crystalline and amorphous carbon phases. The crystalline structures appear to be of two allotropic modifications of carbon: graphite and carbyne. These carbyne crystals were produced during the deposition of pyrocarbon on pyrolytic boron nitride rods at a moderate temperature and pressure by the decomposition of methane.
Descriptors : *BORON NITRIDES, *CARBON, *COATINGS, CRYSTAL STRUCTURE, ELECTRON MICROSCOPY, ELECTRON DIFFRACTION, AMORPHOUS MATERIALS, PYROLYTIC GRAPHITE, FILMS, METHANE, PYROLYSIS
Subject Categories : Ceramics, Refractories and Glass
Distribution Statement : APPROVED FOR PUBLIC RELEASE