Published July 1, 1991 | Version v1
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SiC Coatings on Graphite Spheres

Creators

  • 1. Forschungszentrum Jülich GmbH, Jülich, Germany

Description

[Automatically extracted and translated] In the framework of the development project 'Coated HTR Fuel Elements', graphite spheres are provided with ceramic protective coatings (SiC). This work reports on the materials used, the coating technology, and the corrosion tests on such coated spheres. The results of the corrosion tests show that in the high-temperature range (1000 °C to 1500 °C), variously manufactured SiC layers remained without significant damage. For the critical temperature range 700 °C - 1000 °C, corrosion tests showed that only some heat-treated layers of SiSiC were effective as corrosion protection on A3-3 graphite spheres. A consistent quality of these coatings still needs to be achieved in the course of further development.

Abstract (German)

[Automatisch extrahiert und übersetzt] Im Rahmen des Entwicklungsvorhabens 'Beschichtete HTR-Brennelemente' werden Graphitkugeln mit keramischen Schutzschichten (SiC) versehen. In der vorliegenden Arbeit wird über die verwendeten Materialien, über die Beschichtungstechnik und über die Korrosionstests an solchen beschichteten Kugeln berichtet. Die Ergebnisse der Korrosionsversuche zeigen, dass im hohen Temperaturbereich (1000 °C bis 1500 °C) verschieden hergestellte SiC-Schichten ohne wesentliche Beschädigungen geblieben sind. Für den kritischen Temperaturbereich 700 °C - 1000 °C wurde durch Korrosionsversuche festgestellt, dass nur einige wärmevorbehandelte Schichten aus SiSiC als Korrosionsschutz auf A3-3 Graphitkugeln wirksam waren. Eine gleichmäßige Qualität dieser Beschichtungen muss noch im Laufe der weiteren Entwicklung erreicht werden.

Files

ISR_IB_1991-12_Schröder-Entwicklungsvorhaben Beschichtete HTR-Brennelemente.pdf

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Additional details

Additional titles

Original title (German)
SiC-Beschichtungen von Graphitkugeln

Publishing Information

Report number
KFA-ISR-IB-12/1991

INIS

Country of Publication
Germany
Country of Input or Organization
International Atomic Energy Agency (IAEA)
Subject category
S36: MATERIALS SCIENCE; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Descriptors DEI
CERAMICS; COATINGS; CORROSION; CORROSION RESISTANCE; CRITICAL TEMPERATURE; DAMAGE; FEDERAL REPUBLIC OF GERMANY; GRAPHITE; HTGR TYPE REACTORS; HTR REACTOR; HTR-10 REACTOR; LAYERS; PROTECTIVE COATINGS; SILICON CARBIDES; SPHERES; SURFACE COATING
Descriptors DEC
CARBIDES; CARBON; CARBON COMPOUNDS; CHEMICAL REACTIONS; COATINGS; DEPOSITION; DEVELOPED COUNTRIES; ELEMENTS; ENRICHED URANIUM REACTORS; EUROPE; EXPERIMENTAL REACTORS; GAS COOLED REACTORS; GRAPHITE MODERATED REACTORS; HELIUM COOLED REACTORS; HTGR TYPE REACTORS; IRRADIATION REACTORS; ISOTOPE PRODUCTION REACTORS; MINERALS; NONMETALS; PHYSICAL PROPERTIES; POOL TYPE REACTORS; REACTORS; RESEARCH AND TEST REACTORS; RESEARCH REACTORS; SILICON COMPOUNDS; TEST FACILITIES; TEST REACTORS; THERMAL REACTORS; THERMODYNAMIC PROPERTIES; TRAINING REACTORS; TRANSITION TEMPERATURE; WATER COOLED REACTORS; WATER MODERATED REACTORS; WESTERN EUROPE
Proposed descriptors and Free-text terms
FEDERAL REPUBLIC OF GERMANY; FORSCHUNGSZENTRUM JUELICH; HTGR TYPE REACTORS;

Optional Information

Notes
Document from Juelich Preservation Project