Multilayer coating for carbon composites

Carbon-carbon composite has a SiC pack derived coating 0.5-30 mil thick integral with the surface and an outer layer formed by chemical vapour deposition of Si3N4 to a thickness of 3-30 mil. Substrate can be pre-treated to form either a 1-5 mil thick pyrolytic graphite layer or 0.5-5 ml layer of CVD...

Full description

Saved in:
Bibliographic Details
Main Authors VELTRI RICHARD DANIEL, GALASSO FRANCIS SALVATORE
Format Patent
LanguageEnglish
Italian
Published 01.07.1987
Edition4
Subjects
CHEMICAL SURFACE TREATMENT
CHEMISTRY
COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
COATING MATERIAL WITH METALLIC MATERIAL
COATING METALLIC MATERIAL
DIFFUSION TREATMENT OF METALLIC MATERIAL
INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL
METALLURGY
MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE
Online AccessGet full text

Cover

More Information
Summary:Carbon-carbon composite has a SiC pack derived coating 0.5-30 mil thick integral with the surface and an outer layer formed by chemical vapour deposition of Si3N4 to a thickness of 3-30 mil. Substrate can be pre-treated to form either a 1-5 mil thick pyrolytic graphite layer or 0.5-5 ml layer of CVD SiC. Pack for SiC coating pref. contains 0.1-3% boron and forms a 1-10 mil coating contg. effective amt. of B. 5-20 mil is pref. thickness of Si3N4 layer.
Bibliography:Application Number: IT19840021887