Inverse analysis of giant macroscopic negative thermal expansion of Ca2RuO4%y ceramics based on elasticity and structural topology optimization

Akihiro Takezawa, Koshi Takenaka, Xiaopeng Zhang

研究成果: Article査読

10 被引用数 (Scopus)

抄録

Ca2RuO4%y ceramics exhibit a large volumetric negative thermal expansions (NTE), although the crystallographic volume contraction on heating is much smaller than the NTE. Therefore, we examine the differences in the mechanisms underlying the volumetric thermal expansion for ruthenate ceramics and crystals in the context of the elasticity. We identify the possible microstructure of ruthenate ceramics composed of crystal grains and cavities using structural topology optimization. We conclude that the measured large volumetric NTE of ruthenate ceramics is certainly possible via anisotropic crystallographic thermal expansion through an elastic mechanism.

本文言語English
論文番号055801
ジャーナルApplied Physics Express
11
5
DOI
出版ステータスPublished - 2018 5月
外部発表はい

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)

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