Ceramic coatings on diesel engine components. Period covered: January 1979-August 1979

Technical Report · Mon Oct 01 04:00:00 EDT 1979

DOI:https://doi.org/10.2172/5272291· OSTI ID:5272291

Kvernes, I; Lillerud, K P

Diesel engines with imporved thermal efficiency and fuel economy or flexibility will be required to meet automotive energy conservation goals. These goals can be met by minimizing engine heat loss to the coolant, i.e., by the use of a thermal insulating barrier on the interior surfaces of the combustion space. The development and testing of ceramic coatings for diesel engine components are discussed. These coatings include oxides of Al, Cr, Zr, Mg, Si, Ti, and Ca, and Mo and Ch carbides. Data on their application and thermodynamic and wear characteristics are presented. It was concluded that, although the spraying processes used have not been optimized, plasma-spray technology has made it possible to coat diesel engine parts with ceramic materials. Preliminary results show that, relative to valves and piston crowns: stabilized ZrO/sub 2/ coating under certain conditions increases the working life of various components; higher combustion temperature may improve the thermal efficiency by increased turbocharger air delivery; reduction in the component temperatures decreases the thermal stresses; the ZrO/sub 2/.MgO shows improved corrosion resistance in combustion gases compared to ZrO/sub 2/.Y/sub 2/O/sub 3/ and ZrO/sub 2/.CaO; the limitations of the coatings have to be defined in more detail; and the adherence of thicker coatings has to be improved. Optimization of the spraying process with respect to particle fusion is necessary. Also, Mo and Ch carbide coatings were found to increase the service life of piston rings. (LCL)

• Research Organization: Sentralinstitutt for Industriell Forskning, Oslo (Norway)
• Sponsoring Organization: DOE
• DOE Contract Number: AC03-79ET15320
• OSTI ID: 5272291
• Report Number(s): DOE/ET/15320-T1
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330102* -- Internal Combustion Engines-- Diesel
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CERAMICS
CHALCOGENIDES
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
COATINGS
COMBUSTION CHAMBERS
CONTROL EQUIPMENT
DEPOSITION
DIESEL ENGINES
ENERGY TRANSFER
ENGINES
EQUIPMENT
FLOW REGULATORS
HEAT TRANSFER
INTERNAL COMBUSTION ENGINES
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE TESTING
PHYSICAL PROPERTIES
PISTONS
SILICON COMPOUNDS
SILICON OXIDES
STRESSES
TESTING
THERMAL CONDUCTIVITY
THERMAL STRESSES
THERMODYNAMIC PROPERTIES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
VALVES
WEAR
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES