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Record Details

Record 8 of 3602
Overview of thermal barrier coatings in diesel engines
Offline Availability: Go to Request Form
Author and Affiliation:
Yonushonis, Thomas M.(Cummins Engine Co., Inc., Columbus, IN United States)
Abstract: An 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.
Publication Date: Oct 01, 1995
Document ID:
19960020882
(Acquired Jun 02, 1996)
Accession Number: 96N24405
Subject Category: NONMETALLIC MATERIALS
Document Type: Conference Paper
Publication Information: Thermal Barrier Coating Workshop; 113-126; (NASA-CP-3312); (SEE 19960020872)
Contract/Grant/Task Num: DEN3-331; DEN3-375; DAAE07-94-C-R082; DAAE07-91-C-R005
Financial Sponsor: NASA Lewis Research Center; Cleveland, OH United States
Organization Source: Cummins Engine Co., Inc.; Columbus, IN United States
Description: 14p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: DIESEL ENGINES; THERMAL CONTROL COATINGS; THERMAL FATIGUE; NONDESTRUCTIVE TESTS; FATIGUE LIFE; THERMAL STRESSES; FUEL CONSUMPTION; PROTECTIVE COATINGS; FUEL INJECTION; COMBUSTION CHAMBERS; ENGINE DESIGN; SURFACE ROUGHNESS; METAL BONDING; ENGINE PARTS; METAL SURFACES; EXHAUST EMISSION; STRUCTURAL ANALYSIS; FINITE ELEMENT METHOD; INFRARED IMAGERY; PLASMA SPRAYING; ENGINE TESTS; GENERAL OVERVIEWS
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