Mechanical Property and Fracture Behavior of BaTiO3-Based Nanocomposites

Hae Jin Hwang, Atsushi Nakahira, Tohru Sekino, Koichi Niihara

研究成果: Article査読

4 被引用数 (Scopus)

抄録

Dense and fine grained BaTiO3-based composites with the nano-sized SiC particulate were successfully fabricated by hot-pressing method. Mechanical properties and fracture behavior were investigated. High resolution TEM observation revealed that there were no conspicuous reaction phases in the interface between BaTiO3 and SiC. The crystal structure was changed from ferroelectric tetragonal to paraelectric cubic phase with increasing SiC, and finally was pseudo-cubic for BaTiO3 with more than 3vol% SiC. Mechanical properties such as fracture strength, fracture toughness, Young's modulus and so on were markedly improved by the incorporation of nano-sized SiC particulates. The improvement of mechanical properties, particularly, microhardness and Young's modulus might be caused by the crystal structural change as well as SiC addition. Fracture behavior and subcritical crack growth (SCG) phenomenon were also investigated using the indentation induced flaw method (IIF).

本文言語English
ページ(範囲)1175-1180
ページ数6
ジャーナルjournal of the japan society of powder and powder metallurgy
41
10
DOI
出版ステータスPublished - 1994 2月 1

ASJC Scopus subject areas

  • 機械工学
  • 産業および生産工学
  • 金属および合金
  • 材料化学

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