Interdiffusion in the MgO-Al2O3 spinel with or without some dopants

P. Zhang, Tarasankar Debroy, S. Seetharaman

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

With a view to seek an improved understanding of the DIMOX process, interdiffusion of polycrystalline MgO and Al2O3 in the temperature range 1473 to 1873 K. was studied by diffusion couple experiments. The interdiffusivities in the spinel layer were calculated as functions of composition and temperature. The spinel portion of the phase diagram in the system MgO-Al2O3 was determined from carefully measured compositions at the phase boundaries, and the low temperature spinel region of the phase diagram was confirmed from the present results. For Zn2+ as dopant in alumina, the growth rate of spinel thickness seems to increase when compared with that of the diffusion couples without dopant. The samples containing Si4+ as dopant reveal the formation of a glass phase, and the effect of Si4+ on the diffusion process appears to be negligible.

Original languageEnglish (US)
Pages (from-to)2105-2114
Number of pages10
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume27
Issue number8
DOIs
StatePublished - Jan 1 1996

Fingerprint

spinel
Doping (additives)
Phase diagrams
phase diagrams
Phase boundaries
Chemical analysis
Temperature
Aluminum Oxide
Alumina
Glass
aluminum oxides
temperature
spinell
glass
Experiments

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

Cite this

@article{50e20906c3194392bb05b6ff5c58d404,
title = "Interdiffusion in the MgO-Al2O3 spinel with or without some dopants",
abstract = "With a view to seek an improved understanding of the DIMOX process, interdiffusion of polycrystalline MgO and Al2O3 in the temperature range 1473 to 1873 K. was studied by diffusion couple experiments. The interdiffusivities in the spinel layer were calculated as functions of composition and temperature. The spinel portion of the phase diagram in the system MgO-Al2O3 was determined from carefully measured compositions at the phase boundaries, and the low temperature spinel region of the phase diagram was confirmed from the present results. For Zn2+ as dopant in alumina, the growth rate of spinel thickness seems to increase when compared with that of the diffusion couples without dopant. The samples containing Si4+ as dopant reveal the formation of a glass phase, and the effect of Si4+ on the diffusion process appears to be negligible.",
author = "P. Zhang and Tarasankar Debroy and S. Seetharaman",
year = "1996",
month = "1",
day = "1",
doi = "10.1007/BF02651865",
language = "English (US)",
volume = "27",
pages = "2105--2114",
journal = "Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science",
issn = "1073-5623",
publisher = "Springer Boston",
number = "8",

}

Interdiffusion in the MgO-Al2O3 spinel with or without some dopants. / Zhang, P.; Debroy, Tarasankar; Seetharaman, S.

In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 27, No. 8, 01.01.1996, p. 2105-2114.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Interdiffusion in the MgO-Al2O3 spinel with or without some dopants

AU - Zhang, P.

AU - Debroy, Tarasankar

AU - Seetharaman, S.

PY - 1996/1/1

Y1 - 1996/1/1

N2 - With a view to seek an improved understanding of the DIMOX process, interdiffusion of polycrystalline MgO and Al2O3 in the temperature range 1473 to 1873 K. was studied by diffusion couple experiments. The interdiffusivities in the spinel layer were calculated as functions of composition and temperature. The spinel portion of the phase diagram in the system MgO-Al2O3 was determined from carefully measured compositions at the phase boundaries, and the low temperature spinel region of the phase diagram was confirmed from the present results. For Zn2+ as dopant in alumina, the growth rate of spinel thickness seems to increase when compared with that of the diffusion couples without dopant. The samples containing Si4+ as dopant reveal the formation of a glass phase, and the effect of Si4+ on the diffusion process appears to be negligible.

AB - With a view to seek an improved understanding of the DIMOX process, interdiffusion of polycrystalline MgO and Al2O3 in the temperature range 1473 to 1873 K. was studied by diffusion couple experiments. The interdiffusivities in the spinel layer were calculated as functions of composition and temperature. The spinel portion of the phase diagram in the system MgO-Al2O3 was determined from carefully measured compositions at the phase boundaries, and the low temperature spinel region of the phase diagram was confirmed from the present results. For Zn2+ as dopant in alumina, the growth rate of spinel thickness seems to increase when compared with that of the diffusion couples without dopant. The samples containing Si4+ as dopant reveal the formation of a glass phase, and the effect of Si4+ on the diffusion process appears to be negligible.

UR - http://www.scopus.com/inward/record.url?scp=0030211792&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030211792&partnerID=8YFLogxK

U2 - 10.1007/BF02651865

DO - 10.1007/BF02651865

M3 - Article

AN - SCOPUS:0030211792

VL - 27

SP - 2105

EP - 2114

JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

SN - 1073-5623

IS - 8

ER -