Accession Number : AD0775346

Title :   Development and Evaluation of PG/SiC Codeposited Coatings for Rocket Nozzle Inserts. Volume I. Insert Test and Evaluation in High Performance Propellant Environments.

Descriptive Note : Final rept. Apr 72-Aug 73,


Personal Author(s) : Bielawski,Cedric ; Undercoffer,Kenneth E. ; Singleton,Richard H.

Report Date : FEB 1974

Pagination or Media Count : 141

Abstract : Seven 1.7-inch throat diameter rocket nozzles were test fired in the HIPPO high pressure facilities at Edwards Air Force Base using three different solid propellants. Three 1.0-inch and two 2.0-inch throat diameter rocket nozzles were test fired at Atlantic Research Corporation using three different gel propellants. All of the throat inserts and most of the entrance sections were coated with PG/SiC. The erosion rates of all of the coated inserts tested in this program are plotted in Figures 49 and 50 as functions of pressure with temperature and level of gas oxidizing species indicated. No delaminations occurred. Some cracking of the inserts occurred but this did not interfere with the attainment of erosion data. (Modified author abstract)

Descriptors :   *Solid propellant rocket engines, *Rocket nozzles, *Nozzle inserts, *Coatings, Silicon carbides, Pyrolytic graphite, Erosive burning, Captive tests, Vapor deposition

Subject Categories : Ceramics, Refractories and Glass
      Solid Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE