Phase separation and microstructure evolution of rapidly quenched Gd-Hf-Co-Al alloys

J. H. Han, N. Mattern, D. H. Kim, J. Eckert

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Phase separated metallic glasses were prepared in the Gd-Hf-Co-Al system by rapid quenching of the melt. Due to the strong positive enthalpy of mixing between the main constituent elements Gd and Hf (ΔHGd-Hf = +11 kJ/mol) a heterogeneous microstructure is formed consisting of two amorphous phases, which are Gd-enriched and Hf-enriched, respectively. The size of the phase separated regions varies from 0.1 μm to 5 μm, depending on alloy composition and cooling rate. Different types of microstructure, such as an interconnected structure or a droplet structure were obtained as a function of cooling rate. The microstructure of the phase separated metallic glasses is determined not only by their composition, the critical temperature, and the shape of the miscibility gap, but also by the viscosity and diffusivity of the melt.

Original languageEnglish
Pages (from-to)S42-S45
JournalJournal of Alloys and Compounds
Volume509
Issue numberSUPPL. 1
DOIs
Publication statusPublished - 2011 Jul 14

Fingerprint

Phase separation
Metallic glass
Microstructure
Cooling
Rapid quenching
Chemical analysis
Enthalpy
Solubility
Viscosity
Temperature

All Science Journal Classification (ASJC) codes

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

Cite this

Han, J. H. ; Mattern, N. ; Kim, D. H. ; Eckert, J. / Phase separation and microstructure evolution of rapidly quenched Gd-Hf-Co-Al alloys. In: Journal of Alloys and Compounds. 2011 ; Vol. 509, No. SUPPL. 1. pp. S42-S45.
@article{652ceceec22b4b15b8951fa815123aef,
title = "Phase separation and microstructure evolution of rapidly quenched Gd-Hf-Co-Al alloys",
abstract = "Phase separated metallic glasses were prepared in the Gd-Hf-Co-Al system by rapid quenching of the melt. Due to the strong positive enthalpy of mixing between the main constituent elements Gd and Hf (ΔHGd-Hf = +11 kJ/mol) a heterogeneous microstructure is formed consisting of two amorphous phases, which are Gd-enriched and Hf-enriched, respectively. The size of the phase separated regions varies from 0.1 μm to 5 μm, depending on alloy composition and cooling rate. Different types of microstructure, such as an interconnected structure or a droplet structure were obtained as a function of cooling rate. The microstructure of the phase separated metallic glasses is determined not only by their composition, the critical temperature, and the shape of the miscibility gap, but also by the viscosity and diffusivity of the melt.",
author = "Han, {J. H.} and N. Mattern and Kim, {D. H.} and J. Eckert",
year = "2011",
month = "7",
day = "14",
doi = "10.1016/j.jallcom.2010.12.210",
language = "English",
volume = "509",
pages = "S42--S45",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",
publisher = "Elsevier BV",
number = "SUPPL. 1",

}

Phase separation and microstructure evolution of rapidly quenched Gd-Hf-Co-Al alloys. / Han, J. H.; Mattern, N.; Kim, D. H.; Eckert, J.

In: Journal of Alloys and Compounds, Vol. 509, No. SUPPL. 1, 14.07.2011, p. S42-S45.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Phase separation and microstructure evolution of rapidly quenched Gd-Hf-Co-Al alloys

AU - Han, J. H.

AU - Mattern, N.

AU - Kim, D. H.

AU - Eckert, J.

PY - 2011/7/14

Y1 - 2011/7/14

N2 - Phase separated metallic glasses were prepared in the Gd-Hf-Co-Al system by rapid quenching of the melt. Due to the strong positive enthalpy of mixing between the main constituent elements Gd and Hf (ΔHGd-Hf = +11 kJ/mol) a heterogeneous microstructure is formed consisting of two amorphous phases, which are Gd-enriched and Hf-enriched, respectively. The size of the phase separated regions varies from 0.1 μm to 5 μm, depending on alloy composition and cooling rate. Different types of microstructure, such as an interconnected structure or a droplet structure were obtained as a function of cooling rate. The microstructure of the phase separated metallic glasses is determined not only by their composition, the critical temperature, and the shape of the miscibility gap, but also by the viscosity and diffusivity of the melt.

AB - Phase separated metallic glasses were prepared in the Gd-Hf-Co-Al system by rapid quenching of the melt. Due to the strong positive enthalpy of mixing between the main constituent elements Gd and Hf (ΔHGd-Hf = +11 kJ/mol) a heterogeneous microstructure is formed consisting of two amorphous phases, which are Gd-enriched and Hf-enriched, respectively. The size of the phase separated regions varies from 0.1 μm to 5 μm, depending on alloy composition and cooling rate. Different types of microstructure, such as an interconnected structure or a droplet structure were obtained as a function of cooling rate. The microstructure of the phase separated metallic glasses is determined not only by their composition, the critical temperature, and the shape of the miscibility gap, but also by the viscosity and diffusivity of the melt.

UR - http://www.scopus.com/inward/record.url?scp=79958151969&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79958151969&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2010.12.210

DO - 10.1016/j.jallcom.2010.12.210

M3 - Article

AN - SCOPUS:79958151969

VL - 509

SP - S42-S45

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

IS - SUPPL. 1

ER -