Resintered microstructure dependence of mechanical properties of alumina wire processed by controlled fracture forming

Wen Bo Du, Kiyohiko Tatsuzawa, Tatsuhiko Aizawa, Junji Kihara

研究成果: Article査読

抄録

The mechanical properties of the CFF-Al2O3 wire with respect to the Vickers hardness, the fracture toughness and the fracture/tensile strength have been discussed in the present investigation. Results indicate that the CFF process is valid for fabricating Al2O3 wire with enhanced mechanical properties. Residual pores in the resintered microstructure are thought to be fatal in determination of the mechanical properties, but the grain size dependence seems to be insensitive. At presence of porosity lower than 2.0%, the fracture of the CFF-Al2O3 wire is controlled by the transgranular mode, and its fracture/tensile strength achieves 1.1 GPa. However, the intergranular mode becomes dominated, resulting in a decrease in strength if porosity is higher than 2.0%.

本文言語English
ページ(範囲)1073-1079
ページ数7
ジャーナルFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
47
10
DOI
出版ステータスPublished - 2000 10月

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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