Evaluation of elastic strain energy associated with the formation of hydride precipitates in LaNi5

K. Tanaka, S. Okazaki, T. Ichitsubo, T. Yamamoto, H. Inui, M. Yamaguchi, M. Koiwa

研究成果: Conference article査読

30 被引用数 (Scopus)

抄録

The elastic energy associated with coherent precipitation of hydrides with various shapes in LaNi5 has been calculated by the Eshelby method with the single-crystal elastic constants experimentally determined by a rectangular parallelepiped resonance method. The calculated elastic energy amounts to about 70% of the change in chemical energy that occurs upon hydride formation. This implies the difficulty for coherent hydrides to nucleate in the perfect lattice of LaNi5. This is in contrast to the case of titanium or zirconium, in which the associated elastic energies are only about 15% of the chemical energy change. Hydride precipitation in LaNi5 is thus suggested to occur preferentially at free surfaces and lattice defects such as dislocations and grain boundaries.

本文言語English
ページ(範囲)613-618
ページ数6
ジャーナルIntermetallics
8
5-6
DOI
出版ステータスPublished - 2000
外部発表はい
イベント5th IUMRS International Conference on Advanced Materials - Symposium D: Intermetallic Compounds and Bulk Metallic Glasses - Beijing, China
継続期間: 1999 6 131999 6 18

ASJC Scopus subject areas

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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