Partially-devitrified icosahedral quasicrystalline phase in Ti33.33Zr33.33Hf13.33Ni20 and Zr30Hf30Ni15Cu10Ti15 amorphous alloys with near equi-atomic compositions

A. Takeuchi, K. Amiya, K. Yubuta

研究成果: Article査読

3 被引用数 (Scopus)


Ti33.33Zr33.33Hf13.33Ni20 and Zr30Hf30Ni15Cu10Ti15 alloys were investigated for their possibility to be formed into a high-entropy alloy (HEA) with a quasicrystalline (QC) structure that contains an icosahedral- (I-) phase. The melt-spun alloys quenched at a circumference speed of 39 m/s were formed into an amorphous single phase. The amorphous alloys annealed up to a temperature between the first and second crystallization temperatures exhibited mixed phases of I- and remaining amorphous phases. Observation of the Zr30Hf30Ni15Cu10Ti15 amorphous alloy heated up to 745 K with transmission electron microscope revealed the presence of precipitates with diameters ranging 10–20 nm. Nano-beam diffraction demonstrated that the precipitates were identified to be the I-phase with the five-, three- and two-fold symmetries. The Ti33.33Zr33.33Hf13.33Ni20 and Zr30Hf30Ni15Cu10Ti15 alloys were not formed into a single quasicrystalline phase as HEAs, but the discussions of the current and early experimental data led to provide the way to approach high-entropy quasicrystalline alloys (HE-QCs).

ジャーナルMaterials Chemistry and Physics
出版ステータスPublished - 2018 5 1

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学


「Partially-devitrified icosahedral quasicrystalline phase in Ti<sub>33.33</sub>Zr<sub>33.33</sub>Hf<sub>13.33</sub>Ni<sub>20</sub> and Zr<sub>30</sub>Hf<sub>30</sub>Ni<sub>15</sub>Cu<sub>10</sub>Ti<sub>15</sub> amorphous alloys with near equi-atomic compositions」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。