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An investigation of enhanced capability thermal barrier coating systems for diesel engine componentsMaterial systems and processes for the development of effective and durable thermal barriers for heavy duty diesel engines were investigated. Seven coating systems were evaluated for thermal conductivity, erosion resistance, corrosion/oxidation resistance, and thermal shock resistance. An advanced coating system based on plasma sprayed particle yttria stabilized zirconia (PS/HYSZ) was judged superior in these tests. The measured thermal conductivity of the selected coating was 0.893 W/m C at 371 C. The PS/HYSZ coating system was applied to the piston crown, fire deck and valves of a single cylinder low heat rejection diesel engine. The coated engine components were tested for 24 hr at power levels from 0.83 MPa to 1.17 MPa brake mean effective pressure. The component coatings survived the engine tests with a minimum of distress. The measured fire deck temperatures decreased 86 C (155 F) on the intake side and 42 C (75 F) on the exhaust side with the coating applied.
Document ID
19850009845
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Holtzman, R. L. (General Motors Corp. Indianapolis, IN, United States)
Layne, J. L. (General Motors Corp. Indianapolis, IN, United States)
Schechter, B. (General Motors Corp. Indianapolis, IN, United States)
Date Acquired
September 5, 2013
Publication Date
August 1, 1984
Subject Category
Nonmetallic Materials
Report/Patent Number
EDR-11869
NAS 1.26:174820
DOE/NASA/0326-1
NASA-CR-174820
Accession Number
85N18154
Funding Number(s)
CONTRACT_GRANT: DE-AI01-80CS-50194
CONTRACT_GRANT: DEN3-326
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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