NDLI: Rocket thrust chamber thermal barrier coatings

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Rocket thrust chamber thermal barrier coatings

Content Provider	NASA Technical Reports Server (NTRS)
Author	Vogan, J. W. Batakis, A. P.
Copyright Year	1985
Description	A research program was conducted to generate data and develop analytical techniques to predict the performance and reliability of ceramic thermal barrier coatings in high heat flux environments. A finite element model was used to analyze the thermomechanical behavior of coating systems in rocket thrust chambers. Candidate coating systems (using a copper substrate, NiCrAlY bond coat and ZrO2.8Y2O3 ceramic overcoat) were selected for detailed study based on photomicrographic evaluations of experimental test specimens. The effects of plasma spray application parameters on the material properties of these coatings were measured and the effects on coating performance evaluated using the finite element model. Coating design curves which define acceptable operating envelopes for seleted coating systems were constructed based on temperature and strain limitations. Spray gun power levels was found to have the most significant effect on coating structure. Three coating systems were selected for study using different power levels. Thermal conductivity, strain tolerance, density, and residual stress were measured for these coatings. Analyses indicated that extremely thin coatings ( 0.02 mm) are required to accommodate the high heat flux of a rocket thrust chamber and ensure structural integrity.
File Size	9735416
Page Count	180
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19860011026
Archival Resource Key	ark:/13960/t5dc2x685
Language	English
Publisher Date	1985-07-01
Access Restriction	Open
Subject Keyword	Spacecraft Propulsion And Power Finite Element Method Thermal Control Coatings Thrust Chambers Thermal Conductivity Ceramics Plasma Spraying Prediction Analysis Techniques Residual Stress Heat Flux Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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