Advanced ACS Valva Sealing Surface Compatibility Investigation

Abstract

A research program was necessitated by the finding that a developed magnetically linked bipropellant valve showed extensive finish deterioration of both the poppet and seat mating surfaces after being operated in chlorine pentafluoride (CPF). The same valve design, using the same materials of construction, performed properly when operated using liquid monomethyl hydrazine. Surface roughness measurements on CPF exposed poppets furthermore revealed that the surface finish deterioration was far more severe in sealing and impact areas than on nonsealing surfaces. The prime objective, that of determining the mechanism of sealing surface deterioration, was accomplished during the program. In addition, design parameters were evolved which can lead to a successful design meeting all of the design objectives for valve operational performance in fluorinated oxidizers.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1971
Accession Number
AD0735286

Entities

People

  • Gerald R. Pfeifer
  • Horst Wichmann
  • Reinholdt Kratzer

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Ceramic Materials
  • Chemical Reactions
  • Chemical Synthesis
  • Chemistry
  • Crystal Structure
  • Failure Mode And Effect Analysis
  • Finishes
  • Literature Surveys
  • Material Degradation Processes
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Mechanics
  • Rocket Oxidizers
  • Surface Chemistry
  • Surface Properties

Readers

  • Internal Combustion Engine (ICE) Technology.
  • Surface Coatings Technology.
  • Systems Analysis and Design