Kinetic analysis of spinel formation at the interface of CaO-Al2O3 fibre-reinforced Al 7075 composites

Yun Mo Sung; Jae Woo Ahn

doi:10.1023/A:1004769318641

Kinetic analysis of spinel formation at the interface of CaO-Al₂O₃ fibre-reinforced Al 7075 composites

Yun Mo Sung, Jae Woo Ahn

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

A kinetic analysis was performed on the spinel (MgAl₂O₄) formation reaction at the interfacial region of the calcium aluminate (CaO-Al₂O₃) fibre-reinforced aluminum 7075 alloy matrix composites (CA/Al 7075) processed at 1200°K. The counterdiffusion model of Mg²⁺ and Al³⁺ fluxes was employed for the spinel formation reaction. From the parabolic relation between the thickness of the spinel layer and time the reaction rate constant was determined to be a function of the average diffusion coefficient of Al³⁺ ions. By applying the parabolic equation to the experimental data of the CA/Al 7075 the average diffusion coefficient of Al³⁺ ions in the MgAl₂O₄ spinel at 1200°K was calculated and this value appeared to be in small deviation from the extrapolation of previous diffusion coefficient data.

Original language	English
Pages (from-to)	5127-5132
Number of pages	6
Journal	Journal of Materials Science
Volume	34
Issue number	20
DOIs	https://doi.org/10.1023/A:1004769318641
Publication status	Published - 1999 Oct 15
Externally published	Yes

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1023/A:1004769318641

Cite this

@article{bf7b52d3ea554f91ab984394aa546841,

title = "Kinetic analysis of spinel formation at the interface of CaO-Al2O3 fibre-reinforced Al 7075 composites",

abstract = "A kinetic analysis was performed on the spinel (MgAl2O4) formation reaction at the interfacial region of the calcium aluminate (CaO-Al2O3) fibre-reinforced aluminum 7075 alloy matrix composites (CA/Al 7075) processed at 1200°K. The counterdiffusion model of Mg2+ and Al3+ fluxes was employed for the spinel formation reaction. From the parabolic relation between the thickness of the spinel layer and time the reaction rate constant was determined to be a function of the average diffusion coefficient of Al3+ ions. By applying the parabolic equation to the experimental data of the CA/Al 7075 the average diffusion coefficient of Al3+ ions in the MgAl2O4 spinel at 1200°K was calculated and this value appeared to be in small deviation from the extrapolation of previous diffusion coefficient data.",

author = "Sung, {Yun Mo} and Ahn, {Jae Woo}",

note = "Funding Information: This study was partially supported by the Daejin University research grants in 1997.",

year = "1999",

month = oct,

day = "15",

doi = "10.1023/A:1004769318641",

language = "English",

volume = "34",

pages = "5127--5132",

journal = "Journal of Materials Science",

issn = "0022-2461",

publisher = "Springer Netherlands",

number = "20",

}

TY - JOUR

T1 - Kinetic analysis of spinel formation at the interface of CaO-Al2O3 fibre-reinforced Al 7075 composites

AU - Sung, Yun Mo

AU - Ahn, Jae Woo

N1 - Funding Information: This study was partially supported by the Daejin University research grants in 1997.

PY - 1999/10/15

Y1 - 1999/10/15

N2 - A kinetic analysis was performed on the spinel (MgAl2O4) formation reaction at the interfacial region of the calcium aluminate (CaO-Al2O3) fibre-reinforced aluminum 7075 alloy matrix composites (CA/Al 7075) processed at 1200°K. The counterdiffusion model of Mg2+ and Al3+ fluxes was employed for the spinel formation reaction. From the parabolic relation between the thickness of the spinel layer and time the reaction rate constant was determined to be a function of the average diffusion coefficient of Al3+ ions. By applying the parabolic equation to the experimental data of the CA/Al 7075 the average diffusion coefficient of Al3+ ions in the MgAl2O4 spinel at 1200°K was calculated and this value appeared to be in small deviation from the extrapolation of previous diffusion coefficient data.

AB - A kinetic analysis was performed on the spinel (MgAl2O4) formation reaction at the interfacial region of the calcium aluminate (CaO-Al2O3) fibre-reinforced aluminum 7075 alloy matrix composites (CA/Al 7075) processed at 1200°K. The counterdiffusion model of Mg2+ and Al3+ fluxes was employed for the spinel formation reaction. From the parabolic relation between the thickness of the spinel layer and time the reaction rate constant was determined to be a function of the average diffusion coefficient of Al3+ ions. By applying the parabolic equation to the experimental data of the CA/Al 7075 the average diffusion coefficient of Al3+ ions in the MgAl2O4 spinel at 1200°K was calculated and this value appeared to be in small deviation from the extrapolation of previous diffusion coefficient data.

UR - http://www.scopus.com/inward/record.url?scp=0346392177&partnerID=8YFLogxK

U2 - 10.1023/A:1004769318641

DO - 10.1023/A:1004769318641

M3 - Article

AN - SCOPUS:0346392177

SN - 0022-2461

VL - 34

SP - 5127

EP - 5132

JO - Journal of Materials Science

JF - Journal of Materials Science

IS - 20

ER -

Kinetic analysis of spinel formation at the interface of CaO-Al₂O₃ fibre-reinforced Al 7075 composites

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this