Glass forming ability and crystallization behavior of Ti-based amorphous alloys with high specific strength

Y. C. Kim, DongHyun Bae, W. T. Kim, Do Hyang Kim

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

Thermal stability and crystallization behavior of melt-spun Ti 50-xCu25Ni15Sn3Be7Zr x (x = 0, 1, 3, 5 and 7) amorphous alloys have been investigated using differential scanning calorimetry (DSC), X-ray diffractometry and transmission electron microscopy. With increasing Zr content, x, from 0 to 7, both ΔTx(= Tx - Tg) and Trg(= Tg/Tl) gradually increase from 45 to 56 K and from 0.53 to 0.60, respectively, indicating that the alloys containing Zr have a good glass forming ability, where Tg, Tx, and Tl are glass transition, crystallization, and liquidus temperatures, respectively. The Ti50Cu25Ni15Sn3Be7 alloy shows three endothermic events in the DSC curve; initially the alloy crystallizes by forming crystalline phase a few nanometers in scale, followed by decomposition into a mixture of Ti(Ni,Cu), TiCu, Ti3Sn, and TiBe12 phases at high temperature. On the other hand, the alloys containing Zr consist of only nanocrystalline phases around 10 nm in size even after the second endothermic event due to their increased atomic packing density. For the Ti45Cu25Ni15Sn 3Be7Zr5 alloy, fully amorphous rods up to 5 mm in diameter are successfully fabricated by injection casting. The amorphous alloys exhibit high compressive strength around 2500 MPa with good ductility.

Original languageEnglish
Pages (from-to)242-250
Number of pages9
JournalJournal of Non-Crystalline Solids
Volume325
Issue number1-3
DOIs
Publication statusPublished - 2003 Sep 15

Fingerprint

Amorphous alloys
Crystallization
crystallization
Glass
glass
Differential scanning calorimetry
X ray diffraction analysis
Compressive strength
heat measurement
Ductility
Glass transition
Casting
Thermodynamic stability
Crystalline materials
scanning
Transmission electron microscopy
Decomposition
compressive strength
packing density
liquidus

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

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title = "Glass forming ability and crystallization behavior of Ti-based amorphous alloys with high specific strength",
abstract = "Thermal stability and crystallization behavior of melt-spun Ti 50-xCu25Ni15Sn3Be7Zr x (x = 0, 1, 3, 5 and 7) amorphous alloys have been investigated using differential scanning calorimetry (DSC), X-ray diffractometry and transmission electron microscopy. With increasing Zr content, x, from 0 to 7, both ΔTx(= Tx - Tg) and Trg(= Tg/Tl) gradually increase from 45 to 56 K and from 0.53 to 0.60, respectively, indicating that the alloys containing Zr have a good glass forming ability, where Tg, Tx, and Tl are glass transition, crystallization, and liquidus temperatures, respectively. The Ti50Cu25Ni15Sn3Be7 alloy shows three endothermic events in the DSC curve; initially the alloy crystallizes by forming crystalline phase a few nanometers in scale, followed by decomposition into a mixture of Ti(Ni,Cu), TiCu, Ti3Sn, and TiBe12 phases at high temperature. On the other hand, the alloys containing Zr consist of only nanocrystalline phases around 10 nm in size even after the second endothermic event due to their increased atomic packing density. For the Ti45Cu25Ni15Sn 3Be7Zr5 alloy, fully amorphous rods up to 5 mm in diameter are successfully fabricated by injection casting. The amorphous alloys exhibit high compressive strength around 2500 MPa with good ductility.",
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Glass forming ability and crystallization behavior of Ti-based amorphous alloys with high specific strength. / Kim, Y. C.; Bae, DongHyun; Kim, W. T.; Kim, Do Hyang.

In: Journal of Non-Crystalline Solids, Vol. 325, No. 1-3, 15.09.2003, p. 242-250.

Research output: Contribution to journalArticle

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