Phase separation in Ni70Nb30-xYx glasses

N. Mattern, U. Vainio, B. Schwarz, J. M. Park, Do Hyang Kim, J. Eckert

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Phase-separated metallic glasses in the ternary Ni-Nb-Y system were prepared by rapid quenching of the melt. For Ni-rich alloys, an early stage of spinodal decomposition or an almost homogeneous glassy state is obtained due to a lowering of the critical temperature of the liquid-liquid phase separation near to the glass transition temperature. In-situ small-angle X-ray scattering at elevated temperature gives evidence for ongoing phase separation of the glass prior to crystallization. The structural changes during isothermal heat treatment point to a spinodal mechanism of the decomposition. For glass with low Y-content (5 at%), no indication for phase separation is found in accordance with the composition dependence of the metastable miscibility gap of the supercooled liquid. Upon heating, the phase separated glass acts as a precursor and is the reason for the nanostructure of the Ni2Y-phase formed during the first stage of crystallization.

Original languageEnglish
Pages (from-to)1842-1845
Number of pages4
JournalIntermetallics
Volume18
Issue number10
DOIs
Publication statusPublished - 2010 Oct 1

Fingerprint

Phase separation
Crystallization
Glass
Liquids
Rapid quenching
Spinodal decomposition
Metallic glass
X ray scattering
Nanostructures
Solubility
Heat treatment
Decomposition
Heating
Temperature
Chemical analysis
Glass transition temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Mattern, N., Vainio, U., Schwarz, B., Park, J. M., Kim, D. H., & Eckert, J. (2010). Phase separation in Ni70Nb30-xYx glasses. Intermetallics, 18(10), 1842-1845. https://doi.org/10.1016/j.intermet.2010.02.035
Mattern, N. ; Vainio, U. ; Schwarz, B. ; Park, J. M. ; Kim, Do Hyang ; Eckert, J. / Phase separation in Ni70Nb30-xYx glasses. In: Intermetallics. 2010 ; Vol. 18, No. 10. pp. 1842-1845.
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Mattern, N, Vainio, U, Schwarz, B, Park, JM, Kim, DH & Eckert, J 2010, 'Phase separation in Ni70Nb30-xYx glasses', Intermetallics, vol. 18, no. 10, pp. 1842-1845. https://doi.org/10.1016/j.intermet.2010.02.035

Phase separation in Ni70Nb30-xYx glasses. / Mattern, N.; Vainio, U.; Schwarz, B.; Park, J. M.; Kim, Do Hyang; Eckert, J.

In: Intermetallics, Vol. 18, No. 10, 01.10.2010, p. 1842-1845.

Research output: Contribution to journalArticle

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Mattern N, Vainio U, Schwarz B, Park JM, Kim DH, Eckert J. Phase separation in Ni70Nb30-xYx glasses. Intermetallics. 2010 Oct 1;18(10):1842-1845. https://doi.org/10.1016/j.intermet.2010.02.035