HREM observation and high-pressure composition isotherm measurement of Ti<inf>45</inf>Zr<inf>38</inf>Ni<inf>17</inf> quasicrystal powders synthesized by mechanical alloying

Tomoki Tominaga, Akito Takasaki, Tsuyoshi Shibato, Konrad ͆wierczek

研究成果: Article

1 引用 (Scopus)

抄録

Abstract Elemental powders consisted of chemical composition of Ti<inf>45</inf>Zr<inf>38</inf>Ni<inf>17</inf> were mechanical alloyed and annealed subsequently, and the microstructures were characterized by high-resolution electron microscopy (HREM) and an X-ray diffractometry, and hydrogen absorption and desorption pressure-composition (PC) isotherms were measured at 523 K, 573 K and 623 K by a Sieverts type apparatus. The annealing after mechanical alloying (MA) caused formation of an icosahedral quasicrystal with a Ti<inf>2</inf>Ni type crystal phases. 5 or 10-fold rotational symmetry, which is prohibited to normal crystals, was observed by HREM in a digital diffractogram and an simulated atomic arrangement derived from the digital diffractogram. The hydrogen storage capacity (hydrogen to metal atom ratio: H/M) at 523 K was about 1.3, which decreased with increasing hydrogenation temperatures. All the PC isotherms were steep, and no plateau pressure was observed.

元の言語English
記事番号32989
ページ(範囲)S292-S294
ジャーナルJournal of Alloys and Compounds
645
発行部数S1
DOI
出版物ステータスPublished - 2015 8 11

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Quasicrystals
High resolution electron microscopy
Mechanical alloying
Powders
Isotherms
Hydrogen
Chemical analysis
Crystals
Hydrogen storage
Crystal symmetry
X ray diffraction analysis
Hydrogenation
Desorption
Metals
Annealing
Atoms
Microstructure
Temperature

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

これを引用

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title = "HREM observation and high-pressure composition isotherm measurement of Ti45Zr38Ni17 quasicrystal powders synthesized by mechanical alloying",
abstract = "Abstract Elemental powders consisted of chemical composition of Ti45Zr38Ni17 were mechanical alloyed and annealed subsequently, and the microstructures were characterized by high-resolution electron microscopy (HREM) and an X-ray diffractometry, and hydrogen absorption and desorption pressure-composition (PC) isotherms were measured at 523 K, 573 K and 623 K by a Sieverts type apparatus. The annealing after mechanical alloying (MA) caused formation of an icosahedral quasicrystal with a Ti2Ni type crystal phases. 5 or 10-fold rotational symmetry, which is prohibited to normal crystals, was observed by HREM in a digital diffractogram and an simulated atomic arrangement derived from the digital diffractogram. The hydrogen storage capacity (hydrogen to metal atom ratio: H/M) at 523 K was about 1.3, which decreased with increasing hydrogenation temperatures. All the PC isotherms were steep, and no plateau pressure was observed.",
keywords = "HREM, Mechanical alloying, Pressure-composition isotherm, Quasicrystal, Titanium-zirconium-nickel alloy",
author = "Tomoki Tominaga and Akito Takasaki and Tsuyoshi Shibato and Konrad ͆wierczek",
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T1 - HREM observation and high-pressure composition isotherm measurement of Ti45Zr38Ni17 quasicrystal powders synthesized by mechanical alloying

AU - Tominaga, Tomoki

AU - Takasaki, Akito

AU - Shibato, Tsuyoshi

AU - ͆wierczek, Konrad

PY - 2015/8/11

Y1 - 2015/8/11

N2 - Abstract Elemental powders consisted of chemical composition of Ti45Zr38Ni17 were mechanical alloyed and annealed subsequently, and the microstructures were characterized by high-resolution electron microscopy (HREM) and an X-ray diffractometry, and hydrogen absorption and desorption pressure-composition (PC) isotherms were measured at 523 K, 573 K and 623 K by a Sieverts type apparatus. The annealing after mechanical alloying (MA) caused formation of an icosahedral quasicrystal with a Ti2Ni type crystal phases. 5 or 10-fold rotational symmetry, which is prohibited to normal crystals, was observed by HREM in a digital diffractogram and an simulated atomic arrangement derived from the digital diffractogram. The hydrogen storage capacity (hydrogen to metal atom ratio: H/M) at 523 K was about 1.3, which decreased with increasing hydrogenation temperatures. All the PC isotherms were steep, and no plateau pressure was observed.

AB - Abstract Elemental powders consisted of chemical composition of Ti45Zr38Ni17 were mechanical alloyed and annealed subsequently, and the microstructures were characterized by high-resolution electron microscopy (HREM) and an X-ray diffractometry, and hydrogen absorption and desorption pressure-composition (PC) isotherms were measured at 523 K, 573 K and 623 K by a Sieverts type apparatus. The annealing after mechanical alloying (MA) caused formation of an icosahedral quasicrystal with a Ti2Ni type crystal phases. 5 or 10-fold rotational symmetry, which is prohibited to normal crystals, was observed by HREM in a digital diffractogram and an simulated atomic arrangement derived from the digital diffractogram. The hydrogen storage capacity (hydrogen to metal atom ratio: H/M) at 523 K was about 1.3, which decreased with increasing hydrogenation temperatures. All the PC isotherms were steep, and no plateau pressure was observed.

KW - HREM

KW - Mechanical alloying

KW - Pressure-composition isotherm

KW - Quasicrystal

KW - Titanium-zirconium-nickel alloy

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