Ti-based quasicrystal layers produced by plasma thermal spraying

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Ti45Zr38Ni17 powders were thermally sprayed onto mild steel substrates in air and under a reduced pressure of argon. Two kinds of powder samples were used in this study. For one type the elemental powders were gently (manually) mixed in a vial, and for the other type they were mechanically alloyed by a planetary ball mill. Several kinds of oxides were formed after thermally-spraying the mechanically-alloyed powders in air. After spraying in a reduced pressure of argon, on the other hand, the coating layers obtained from the gently mixed powders consisted of the three elemental metals (Ti, Zr, Ni), but an amorphous phase primarily appeared in the thermallysprayed mechanically-alloyed powders. This amorphous phase transformed into the icosahedral quasicrystal phase and a minor Ti2Ni-type crystal phase after annealing in vacuum at 828 K. The Vickers hardness and the contact angle with pure water for the quasicrystal layers were about 7 GPa and 92° respectively.

Original languageEnglish
Title of host publicationMaterials Science Forum
Pages449-452
Number of pages4
Volume534-536
EditionPART 1
Publication statusPublished - 2007
Event2006 Powder Metallurgy World Congress and Exhibition, PM 2006 - Busan
Duration: 2006 Sep 242006 Sep 28

Publication series

NameMaterials Science Forum
NumberPART 1
Volume534-536
ISSN (Print)02555476

Other

Other2006 Powder Metallurgy World Congress and Exhibition, PM 2006
CityBusan
Period06/9/2406/9/28

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Keywords

  • Mechanical alloying
  • Quasicrystal
  • Thermal spraying
  • Ti-Zr-Ni

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Takasaki, A., Uematsu, S., & Kelton, K. F. (2007). Ti-based quasicrystal layers produced by plasma thermal spraying. In Materials Science Forum (PART 1 ed., Vol. 534-536, pp. 449-452). (Materials Science Forum; Vol. 534-536, No. PART 1).