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Overview of thermal barrier coatings in diesel enginesAn understanding of delamination mechanisms in thermal barrier coatings has been developed for diesel engine applications through rig tests, structural analysis modeling, nondestructive evaluation, and engine evaluation of various thermal barrier coatings. This knowledge has resulted in improved thermal barrier coatings which survive abusive cyclic fatigue tests in high output diesel engines. Although much conflicting literature now exists regarding the impact of thermal barrier coatings on engine performance and fuel consumption, the changes in fuel consumption appear to be less than a few percent and can be negative for state-of-the-art diesel engines. The ability of the thermal barrier coating to improve fuel economy tends to be dependent on a number of factors including the fuel injection system, combustion chamber design, and the initial engine fuel economy. Limited investigations on state-of-the-art diesel engines have indicated that the surface connected porosity and coating surface roughness may influence engine fuel economy. Current research efforts on thermal barrier coatings are primarily directed at reducing in-cylinder heat rejection, thermal fatigue protection of underlying metal surfaces and a possible reduction in diesel engine emissions. Significant efforts are still required to improve the plasma spray processing capability and the economics for complex geometry diesel engine components.
Document ID
19960020882
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Yonushonis, Thomas M.
(Cummins Engine Co., Inc. Columbus, IN United States)
Date Acquired
August 17, 2013
Publication Date
October 1, 1995
Publication Information
Publication: Thermal Barrier Coating Workshop
Subject Category
Nonmetallic Materials
Accession Number
96N24405
Funding Number(s)
CONTRACT_GRANT: DAAE07-91-C-R005
CONTRACT_GRANT: DEN3-375
CONTRACT_GRANT: DEN3-331
CONTRACT_GRANT: DAAE07-94-C-R082
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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