Published May 1980 | Version v1
Report Metadata-only

Material properties and fission product reduction of SiC coatings

Creators

  • 1. Kernforschungsanlage Juelich G.m.b.H. (Germany, F.R.). Inst. fuer Reaktorwerkstoffe und Heisse Zellen

Description

Two new methods are described to characterize pyrolytically deposited SiC coatings which are provided to pyrocarbon coated fuel particles as an additional diffusion barrier for solid fission products. The first is based upon a determination of the concentration of imperfections in the SiC structure from measurements of small-angle X-ray scattering intensities (SAXS) and the second is based upon measurements of rates of SiC decomposition at very high temperatures (>20000C). The data obtained by both methods show a minimum with SiC which was deposited at low deposition rates and 15000C. First results of diffusion measurements show a correlation between the new characterization data and the transport behaviour of solid fission products. (orig.)

Availability note (English)

Available from Kernforschungsanlage Juelich G.m.b.H. (Germany, F.R.).

Abstract (German)

Zwei neue Methoden zur Charakterisierung von pyrolytisch abgeschiedenen SiC-Schichten werden beschrieben. Solche Schichten sind fuer pyrokohlenstoffbeschichtete Brennstoffteilchen als zusaetzliche Barriere fuer feste Spaltprodukte vorgesehen. Die erste Methode basiert auf einer Bestimmung von Stoerungen im SiC-Gefuege durch Messung der Intensitaeten der Roentgen-Kleinwinkelstreuung (SAXS), die zweite auf Messungen der SiC-Zersetzungsgeschwindigkeit bei sehr hohen Temperaturen (> 20000C). Die nach beiden Methoden erhaltenen Werte zeigen ein Minimum bei einem SiC, das bei niedrigen Abscheidungsgeschwindigkeiten und bei 15000C aufgebracht wurde. Erste Ergebnisse von Diffusionsmessungen zeigen eine Korrelation zwischen den neuen Charakterisierungsdaten und dem Transportverhalten fester Spaltprodukte. (orig.)

Additional details

Additional titles

Original title (German)
Materialeigenschaften und Spaltproduktrueckhaltung von SiC-Huellschichten

Publishing Information

Imprint Title
Contributions for the third international carbon conference CARBON '80
Imprint Pagination
47 p.
Journal Page Range
p. 35-47.
Report number
Juel-Conf--36

Conference

Title
3. international carbon conference (CARBON '80).
Dates
30 Jun - 4 Jul 1980.
Place
Baden-Baden (Germany, F.R.).

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
15039251
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; S42: ENGINEERING;
Resource subtype / Literary indicator
Conference, Non-conventional Literature
Descriptors DEI
ANNEALING; CESIUM 137; COATED FUEL PARTICLES; COATINGS; CORRELATIONS; DECOMPOSITION; DEFECTS; DEPOSITION; DIFFUSION; DIFFUSION BARRIERS; FISSION PRODUCTS; KINETICS; MEASURING METHODS; MICROSTRUCTURE; PERFORMANCE TESTING; PYROLYTIC CARBON; RETENTION; SILICON CARBIDES; SILVER 110; SMALL ANGLE SCATTERING; TEMPERATURE DEPENDENCE; TIME DEPENDENCE; VERY HIGH TEMPERATURE
Descriptors DEC
BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CARBIDES; CARBON; CARBON COMPOUNDS; CESIUM ISOTOPES; CHEMICAL REACTIONS; CRYSTAL STRUCTURE; DAYS LIVING RADIOISOTOPES; ELEMENTS; FUEL PARTICLES; HEAT TREATMENTS; INTERMEDIATE MASS NUCLEI; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; MATERIALS; NONMETALS; NUCLEI; ODD-EVEN NUCLEI; ODD-ODD NUCLEI; RADIOACTIVE MATERIALS; RADIOISOTOPES; SCATTERING; SECONDS LIVING RADIOISOTOPES; SILICON COMPOUNDS; SILVER ISOTOPES; TESTING; YEARS LIVING RADIOISOTOPES

Optional Information

Notes
Imprint:Beitraege zur 3. Internationalen Kohlenstofftagung CARBON '80.