Fabrication of yttria stabilized tetragonal zirconia polycrystals containing TiNi intermetallic compounds

Norihito Tanaka, Tohru Sekino, Takafumi Kusunose, Hao Wang, Tadachika Nakayama, Koichi Niihara

Research output: Contribution to journalArticlepeer-review

Abstract

3Y-TZP/TiNiCo composites have been successfully fabricated by three step heating (dehydrogenation, hydrogen reduction, hot-pressing) of 3Y-TZP /NiO/TiH2/CoO powder mixtures. XRD analysis revealed that TiNi-base intermetallic compounds such as Ni4Ti3, NiTi, Ni3́Ti had formed. The bending strength of 3Y-TZP/TiNiCo composites (-650 MPa) were much higher than those of 3Y-TZP monolith (~~350 MPa) sintered at the same condition. The electrical resistivity characteristics indicated that 3Y-TZP/30 vol%TiNiCo composites were good electrical conductors. Cobalt addition to TiNi phase influenced on electrical properties of final composites, while their fracture strength was unchanged by the Co addition.

Original languageEnglish
Pages (from-to)673-676
Number of pages4
JournalKey Engineering Materials
Volume317-318
DOIs
Publication statusPublished - 2006 Jan 1
Externally publishedYes

Keywords

  • Bending Strength
  • Electrical resisitivity
  • Microstructure
  • Reductive Sintering
  • TiNi Intermetallic Compounds
  • Zirconia

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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