Effect of irradiation on the microstructure of Nicalon fibers

A. Hasegawa, G. E. Youngblood, R. H. Jones

研究成果: Letter査読

11 被引用数 (Scopus)

抄録

Microstructural analyses were performed by TEM on two types of Nicalon fibers (CG and Hi) after neutron irradiation at nominally 1040°C to a relatively high dose (43 dpa). For comparison, microstructural analyses also were performed on unirradiated fibers that were thermally annealed at 1010°C for a time equivalent to the irradiation exposure time. No grain growth was observed for either type of unirradiated, but thermally annealed Nicalon fibers. However, significant grain growth was observed to have taken place in the irradiated Nicalon-CG fiber, presumably irradiation induced. In contrast, no significant amount of grain growth was observed in the irradiated Hi-Nicalon fibers. Void and other irradiation defect structures were not observed in either fiber. For such extreme irradiation conditions (43 dpa at 1040°C), the Hi-Nicalon fiber exhibits a much higher degree of microstructural stability than Nicalon-CG fiber. Composite SiC/SiC made with Hi-Nicalon promises to also exhibit improved irradiation performance.

本文言語English
ページ(範囲)245-248
ページ数4
ジャーナルJournal of Nuclear Materials
231
3
DOI
出版ステータスPublished - 1996 8

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 材料科学(全般)
  • 原子力エネルギーおよび原子力工学

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