Crystallization behavior of the CaO-Al2O3-MgO system studied with a confocal laser scanning microscope

Sung Suk Jung; Il Sohn

doi:10.1007/s11663-012-9725-4

Crystallization behavior of the CaO-Al₂O₃-MgO system studied with a confocal laser scanning microscope

Sung Suk Jung, Il Sohn

Department of Materials Science and Engineering

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

45 Citations (Scopus)

Abstract

The crystallization behavior of a calcium-aluminate system with various MgO content from 2.5 to 7.5 wt pct and CaO/Al₂O₃ ratios between 0.8 and 1.2 has been examined using a confocal laser scanning microscope (CLSM). CCT (continuous cooling transformation) and time temperature transformation (TTT) diagrams were constructed to identify the primary crystal phase of slag at different compositions and at cooling rates between 25 and 800 K/minutes. In the slag at a CaO/Al₂O₃ ratio of 1.0, crystallization temperature increased during isothermal and continuous cooling with higher MgO content, and the shortest incubation time was observed at 5 wt pct MgO. When MgO content was fixed to be 5 wt pct, crystallization temperature increased with lower CaO/Al₂O₃ ratio. According to the slag composition, cooling rates and temperature, the primary phase could be CA, or C₅A₃, or C₃A, or C₃MA₂, or MgO, and the crystal morphology changes from dendrites to faceted crystals to columnar crystals in this composition range.

Original language	English
Pages (from-to)	1530-1539
Number of pages	10
Journal	Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Volume	43
Issue number	6
DOIs	https://doi.org/10.1007/s11663-012-9725-4
Publication status	Published - 2012 Dec 1

Bibliographical note

Funding Information:
This study was partially supported by the Ministry of Knowledge Economy Project No. 2011-8-1454.

Publisher Copyright:
© The Minerals, Metals & Materials Society and ASM International 2012.

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys
Materials Chemistry

Access to Document

10.1007/s11663-012-9725-4

Cite this

@article{9af81396e9f5494ca975e7f2f0fbee0c,

title = "Crystallization behavior of the CaO-Al2O3-MgO system studied with a confocal laser scanning microscope",

abstract = "The crystallization behavior of a calcium-aluminate system with various MgO content from 2.5 to 7.5 wt pct and CaO/Al2O3 ratios between 0.8 and 1.2 has been examined using a confocal laser scanning microscope (CLSM). CCT (continuous cooling transformation) and time temperature transformation (TTT) diagrams were constructed to identify the primary crystal phase of slag at different compositions and at cooling rates between 25 and 800 K/minutes. In the slag at a CaO/Al2O3 ratio of 1.0, crystallization temperature increased during isothermal and continuous cooling with higher MgO content, and the shortest incubation time was observed at 5 wt pct MgO. When MgO content was fixed to be 5 wt pct, crystallization temperature increased with lower CaO/Al2O3 ratio. According to the slag composition, cooling rates and temperature, the primary phase could be CA, or C5A3, or C3A, or C3MA2, or MgO, and the crystal morphology changes from dendrites to faceted crystals to columnar crystals in this composition range.",

author = "Jung, {Sung Suk} and Il Sohn",

note = "Funding Information: This study was partially supported by the Ministry of Knowledge Economy Project No. 2011-8-1454. Publisher Copyright: {\textcopyright} The Minerals, Metals & Materials Society and ASM International 2012.",

year = "2012",

month = dec,

day = "1",

doi = "10.1007/s11663-012-9725-4",

language = "English",

volume = "43",

pages = "1530--1539",

journal = "Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science",

issn = "1073-5615",

number = "6",

}

TY - JOUR

T1 - Crystallization behavior of the CaO-Al2O3-MgO system studied with a confocal laser scanning microscope

AU - Jung, Sung Suk

AU - Sohn, Il

N1 - Funding Information: This study was partially supported by the Ministry of Knowledge Economy Project No. 2011-8-1454. Publisher Copyright: © The Minerals, Metals & Materials Society and ASM International 2012.

PY - 2012/12/1

Y1 - 2012/12/1

N2 - The crystallization behavior of a calcium-aluminate system with various MgO content from 2.5 to 7.5 wt pct and CaO/Al2O3 ratios between 0.8 and 1.2 has been examined using a confocal laser scanning microscope (CLSM). CCT (continuous cooling transformation) and time temperature transformation (TTT) diagrams were constructed to identify the primary crystal phase of slag at different compositions and at cooling rates between 25 and 800 K/minutes. In the slag at a CaO/Al2O3 ratio of 1.0, crystallization temperature increased during isothermal and continuous cooling with higher MgO content, and the shortest incubation time was observed at 5 wt pct MgO. When MgO content was fixed to be 5 wt pct, crystallization temperature increased with lower CaO/Al2O3 ratio. According to the slag composition, cooling rates and temperature, the primary phase could be CA, or C5A3, or C3A, or C3MA2, or MgO, and the crystal morphology changes from dendrites to faceted crystals to columnar crystals in this composition range.

AB - The crystallization behavior of a calcium-aluminate system with various MgO content from 2.5 to 7.5 wt pct and CaO/Al2O3 ratios between 0.8 and 1.2 has been examined using a confocal laser scanning microscope (CLSM). CCT (continuous cooling transformation) and time temperature transformation (TTT) diagrams were constructed to identify the primary crystal phase of slag at different compositions and at cooling rates between 25 and 800 K/minutes. In the slag at a CaO/Al2O3 ratio of 1.0, crystallization temperature increased during isothermal and continuous cooling with higher MgO content, and the shortest incubation time was observed at 5 wt pct MgO. When MgO content was fixed to be 5 wt pct, crystallization temperature increased with lower CaO/Al2O3 ratio. According to the slag composition, cooling rates and temperature, the primary phase could be CA, or C5A3, or C3A, or C3MA2, or MgO, and the crystal morphology changes from dendrites to faceted crystals to columnar crystals in this composition range.

UR - http://www.scopus.com/inward/record.url?scp=84865528751&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84865528751&partnerID=8YFLogxK

U2 - 10.1007/s11663-012-9725-4

DO - 10.1007/s11663-012-9725-4

M3 - Article

AN - SCOPUS:84865528751

SN - 1073-5615

VL - 43

SP - 1530

EP - 1539

JO - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science

JF - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science

IS - 6

ER -