Objetivo
The objectives of the project are as follows:
a study of spray drying, including characterisation of starting powders and powders produced;
a study of the plasma densification process in air, underwater, and in a controlled atmosphere;
the production of these characteristics on the plasma spray process and the coating properties;
the reproducibility and reliability of the powder production.
Yttria powder and magnesia stabilised zirconia powder have been processed by spray drying. A densification process of the agglomerated particles shows a dense structure with a smooth spherical surface. Parameters and spraying criteria for coating production have been developed. The microstructure of the deposits meets the aerospace standards. With round robin tests, ceramographic methods are developed to obtain reproducible results in coating characterisation. The coatings produced are tested and characterised by thermal behaviour, corrosion, internal stresses, thermal shock and bond strength properties.
In the field of production of thermal barrier coatings from ceramic zirconia powders, the following research has been conducted:
a study of spray drying, including the characterization of the starting and resulting powders;
a study of the plasma densification in air, under water and in a controlled atmosphere;
characterization of densified powders;
coating production by optimization of spraying and correlation with powder characteristics;
development of ceramographic methods to obtain reproducible results;
characterization of coatings by standard metallographic and X-ray techniques, as well as the measurement of physical properties and their correlation with powder characteristics;
testing of coating properties (corrosion, bond strength, thermal shock, etc) and correlation with powder characteristics.
It is possible to produce dense, globular composite powders with the desired particle size distribution. The production routes can be applied to powders other than zirconia composites.
A new production route has been developed for the production of globular dense composite zirconia powders which can be produced in a predefined particle size range. Spray drying and plasma densification of the spray dried powders are the major steps with the powders produced by underwater plasma densification and transferred arc densification exhibiting particularly good flowability. This outstanding flowability makes the powders very suitable for plasma spraying of thermal barrier coatings.
The coatings produced using these powders have been investigated with respect to their structure and their mechanical and thermal properties, and have been shown to be at least as good as those produced using commercially available powders.
THE AIM OF THIS STUDY IS TO ADAPT THE PLASMA SPRAY TECHNIQUE TO IC ENGINES BY STUDYING CAREFULLY THE MATERIAL POINT OF VIEW. THE SPECIFIC INNOVATIC VALUE OF THIS PROJECT WILL BE THREEFOLD:
1) THE PRODUCTION OF POWDERS WITH KNOWN CHARACTERISTICS;
2) THE INFLUENCE OF THESE CHARACTERISTICS ON THE SPRAYING PROCESS AND THE COATING PROPERTIES LIKE CORROSION BEHAVIOUR, MECHANICAL PROPERTIES;3) THE REPRODUCIBILITY AND RELIABILITY OF THE POWDER PRODUCTION.
IF THIS PROJECT SUCCEEDS THE RESULTS WILL BE A BREAK THROUGH NOT ONLY IN THE PRODUCTION OF CHEAPER THERMAL BARRIERS COATINGS BUT ALSO IN THE DEVELOPMENT OF SMALL AND MEDIUM SIZE DIESEL ENGINES WITH LESS COOLING, BETTER PERFORMANCE AND EFFICIENCY UP TO 5 %.
IN ORDER TO ACHIEVE THESE OBJECTIVES, IT IS PROPOSED:
A) A STUDY OF SPRAY DRYING, INCLUDING CHARACTERIZATION OF STARTING POWDERS AND PRODUCED POWDERS;
B) A STUDY OF THE PLASMA DENSIFICATION PROCESS, IN AIR, UNDER WATER AS WELL AS IN A CONTROLLED ATMOSPHERE;
C) CHARACTERIZATION OF DENSIFIED POWDERS (CHEMICAL AND PHYSICAL ANALYSIS);D) COATING PRODUCTION BY OPTIMIZATION OF THE SPRAYING PROCESS AND CORRELATING WITH THE POWDER CHARACTERISTICS;
E) DEVELOPMENT OF CERAMOGRAPHIC METHODS TO OBTAIN REPRODUCIBLE RESULTS (ROUND ROBIN TEST);
F) CHARACTERIZATION OF THE COATINGS WITH STANDARD METALLOGRAPHIC AND X-RAY TECHNIQUES, AS WELL AS THE MEASUREMENT OF PHYSICAL PROPERTIES, AND CORRELATE WITH POWDER CHARACTERISTICS;
H) THE PRODUCTION OF PROTOTYPE AMOUNTS (BATCHSIZE 25 TO 50 KG) OF POWDER FOR COMPONENT TESTING.
AFTER H) COMPONENT SPRAYING AND COMPONENT TESTING WILL FOLLOW, TOGETHER WITH AN ECONOMIC EVALUATION.
Ámbito científico (EuroSciVoc)
CORDIS clasifica los proyectos con EuroSciVoc, una taxonomía plurilingüe de ámbitos científicos, mediante un proceso semiautomático basado en técnicas de procesamiento del lenguaje natural. Véas: El vocabulario científico europeo..
CORDIS clasifica los proyectos con EuroSciVoc, una taxonomía plurilingüe de ámbitos científicos, mediante un proceso semiautomático basado en técnicas de procesamiento del lenguaje natural. Véas: El vocabulario científico europeo..
- ingeniería y tecnología ingeniería de materiales compuestos
- ingeniería y tecnología ingeniería de materiales recubrimiento y películas
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Programa(s)
Programas de financiación plurianuales que definen las prioridades de la UE en materia de investigación e innovación.
Programas de financiación plurianuales que definen las prioridades de la UE en materia de investigación e innovación.
Tema(s)
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Las convocatorias de propuestas se dividen en temas. Un tema define una materia o área específica para la que los solicitantes pueden presentar propuestas. La descripción de un tema comprende su alcance específico y la repercusión prevista del proyecto financiado.
Convocatoria de propuestas
Procedimiento para invitar a los solicitantes a presentar propuestas de proyectos con el objetivo de obtener financiación de la UE.
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Procedimiento para invitar a los solicitantes a presentar propuestas de proyectos con el objetivo de obtener financiación de la UE.
Régimen de financiación
Régimen de financiación (o «Tipo de acción») dentro de un programa con características comunes. Especifica: el alcance de lo que se financia; el porcentaje de reembolso; los criterios específicos de evaluación para optar a la financiación; y el uso de formas simplificadas de costes como los importes a tanto alzado.
Régimen de financiación (o «Tipo de acción») dentro de un programa con características comunes. Especifica: el alcance de lo que se financia; el porcentaje de reembolso; los criterios específicos de evaluación para optar a la financiación; y el uso de formas simplificadas de costes como los importes a tanto alzado.
Coordinador
5943 AD Lomm
Países Bajos
Los costes totales en que ha incurrido esta organización para participar en el proyecto, incluidos los costes directos e indirectos. Este importe es un subconjunto del presupuesto total del proyecto.