Matches in SemOpenAlex for { <https://semopenalex.org/work/W10103785> ?p ?o ?g. }
Showing items 1 to 49 of
49
with 100 items per page.
- W10103785 abstract "Fuel particles for the HTGR contain a layer of pyrolytic silicon carbide to act as a pressure vessel and fission product barrier. The SiC is deposited by thermal decomposition of methyltrichlorosilane (CH/sub 3/SiCl/sub 3/ or MTS) in an excess of hydrogen. Coatings deposited at temperatures from 1500 to 1700/sup 0/C and coating rates from 0.4 to 1.2 ..mu..m/min have been studied by transmission electron microscopy, small-angle x-ray scattering, x-ray diffraction, optical microscopy, density measurements, scanning electron microscopy, and microhardness measurements. Transmission electron microscopy has the necessary resolution to provide crystallographic information on small coating defects. Major defects were voids, stacking faults, and dislocations. Small-angle x-ray scattering was used to measure the void size distribution; voids were generally from 20 to 80 nm in diameter. X-ray diffraction indicates that SiC coatings are predominantly cubic ..beta..-SiC. However, the high stacking fault density in some coatings can give rise to both x-ray and electron diffraction effects. In some small areas the faulted structure resembles one or more polytypes of ..cap alpha..-SiC. The evidence indicates though that this is a consequence of rapid growth and not a two-phase ..cap alpha.. + ..beta.. mixture in the thermodynamic sense. Reflected-light microscopy can be used quantitatively tomore » measure average grain size and shape but cannot resolve most coating defects. Density measurement can be used to differentiate between coatings that exhibit extremes in performance but cannot be used to detect small variations in quality. Scanning electron microscopy shows that deposition variables affect coating surface morphology, but these features are difficult to quantify and do not bear a simple relationship to internal coating defects. Microhardness was a very insensitive indicator of coating quality. 15 figures.« less" @default.
- W10103785 created "2016-06-24" @default.
- W10103785 creator A5020444037 @default.
- W10103785 creator A5067652919 @default.
- W10103785 date "1981-01-01" @default.
- W10103785 modified "2023-09-27" @default.
- W10103785 title "Characterization of SiC coatings on HTGR fuel particles. Final report" @default.
- W10103785 doi "https://doi.org/10.2172/6943439" @default.
- W10103785 hasPublicationYear "1981" @default.
- W10103785 type Work @default.
- W10103785 sameAs 10103785 @default.
- W10103785 citedByCount "2" @default.
- W10103785 crossrefType "report" @default.
- W10103785 hasAuthorship W10103785A5020444037 @default.
- W10103785 hasAuthorship W10103785A5067652919 @default.
- W10103785 hasConcept C116915560 @default.
- W10103785 hasConcept C127413603 @default.
- W10103785 hasConcept C171250308 @default.
- W10103785 hasConcept C177322064 @default.
- W10103785 hasConcept C185592680 @default.
- W10103785 hasConcept C192562407 @default.
- W10103785 hasConcept C2780841128 @default.
- W10103785 hasConcept C39432304 @default.
- W10103785 hasConceptScore W10103785C116915560 @default.
- W10103785 hasConceptScore W10103785C127413603 @default.
- W10103785 hasConceptScore W10103785C171250308 @default.
- W10103785 hasConceptScore W10103785C177322064 @default.
- W10103785 hasConceptScore W10103785C185592680 @default.
- W10103785 hasConceptScore W10103785C192562407 @default.
- W10103785 hasConceptScore W10103785C2780841128 @default.
- W10103785 hasConceptScore W10103785C39432304 @default.
- W10103785 hasLocation W101037851 @default.
- W10103785 hasLocation W101037852 @default.
- W10103785 hasOpenAccess W10103785 @default.
- W10103785 hasPrimaryLocation W101037851 @default.
- W10103785 hasRelatedWork W2050045653 @default.
- W10103785 hasRelatedWork W2158706874 @default.
- W10103785 hasRelatedWork W2352592110 @default.
- W10103785 hasRelatedWork W2617599841 @default.
- W10103785 hasRelatedWork W2737498735 @default.
- W10103785 hasRelatedWork W2899084033 @default.
- W10103785 hasRelatedWork W3085622580 @default.
- W10103785 hasRelatedWork W4243387708 @default.
- W10103785 hasRelatedWork W4247476793 @default.
- W10103785 hasRelatedWork W4249938786 @default.
- W10103785 isParatext "false" @default.
- W10103785 isRetracted "false" @default.
- W10103785 magId "10103785" @default.
- W10103785 workType "report" @default.