Mechanical properties of cubic silicon carbide after neutron irradiation at elevated temperatures

Yutai Katoh, Lance L. Snead

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Mechanical properties of high-purity polycrystalline cubic SiC was characterized after neutron irradiation. Bar samples were irradiated in target position capsules in the High Flux Isotope Reactor (HFIR, Oak Ridge, Tennessee) to nominal fluence levels up to 7.7 dpa at temperatures of 300, 500, and 800°C. A decrease in Young's modulus was observed after irradiation, and its irradiation temperature dependence qualitatively agreed with the calculated modulus change due to point defect swelling. Irradiation caused a significant modification of statistical flexural strength but caused only minor increase in nano-indentation hardness The irradiation effect on fracture initiation through an enhanced cleavage resistance likely is primarily responsible for the major change in flexural strength properties.

Original languageEnglish
Title of host publicationEffects of Radiation on Materials
Subtitle of host publication22nd Symposium
PublisherAmerican Society for Testing and Materials
Pages365-377
Number of pages13
ISBN (Print)0803134010, 9780803134010
StatePublished - 2006
Event22nd Symposium on Effects of Radiation on Materials - Boston, MA, United States
Duration: Jun 8 2004Jun 10 2004

Publication series

NameASTM Special Technical Publication
Volume1475 STP
ISSN (Print)0066-0558

Conference

Conference22nd Symposium on Effects of Radiation on Materials
Country/TerritoryUnited States
CityBoston, MA
Period06/8/0406/10/04

Keywords

  • Elastic modulus
  • Flexural strength
  • Nano-indentation
  • Neutron irradiation
  • Silicon carbide

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