Thermodynamic assessment and its application of ternary Mg-Zn-Ca system using CALPHAD method

Joon Seok Kyeong; Hyun Kyu Lim; Hu Dam Lee; Won Tae Kim; Do Hyang Kim; Byeong JooLee

Thermodynamic assessment and its application of ternary Mg-Zn-Ca system using CALPHAD method

Joon Seok Kyeong, Hyun Kyu Lim, Hu Dam Lee, Won Tae Kim, Do Hyang Kim, Byeong JooLee

Department of Materials Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

Abstract

Recently, Mg-Zn-Ca ternary system has been reported to have excellent creep resistance since addition of Ca form Mg₂Ca with high thermal stability and addition of Zn induces solution hardening effect. However, complete thermodynamic study has not besn performed yet. In this study, phase equilibrium and thermodynamic study about Mg-Zn-Ca system including 2 ternary compounds (τ₁: Ca₂Mg₆Zn₃, τ₂; Ca₁Mg₃Zn₆) has been considered. In order to assess thermodynamic parameters of ternary compound τ₂, isothermal section and isopleths has been made by using DSC, DTA, XRD, SEM and TEM around the composition range of τ₂. Calculated phase diagram of Mg-Zn-Ca ternary system has been studied with assessed ternary compound parameters. Solidification simulation via Scheil equation has been discussed with as-casted specimens and after heat treatment, and in particular invariant reactions have been compared with bulk glass form region.

Original language	English
Title of host publication	Magnesium Technology 2009
Pages	167-172
Number of pages	6
Publication status	Published - 2009
Event	Magnesium Technology 2009 - San Francisco, CA, United States Duration: 2009 Feb 15 → 2009 Feb 19

Publication series

Name	Magnesium Technology
ISSN (Print)	1545-4150

Other

Other	Magnesium Technology 2009
Country	United States
City	San Francisco, CA
Period	09/2/15 → 09/2/19

All Science Journal Classification (ASJC) codes

Engineering(all)

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@inproceedings{5766f16e92034532a18ba8b9baa1c4fe,

title = "Thermodynamic assessment and its application of ternary Mg-Zn-Ca system using CALPHAD method",

abstract = "Recently, Mg-Zn-Ca ternary system has been reported to have excellent creep resistance since addition of Ca form Mg2Ca with high thermal stability and addition of Zn induces solution hardening effect. However, complete thermodynamic study has not besn performed yet. In this study, phase equilibrium and thermodynamic study about Mg-Zn-Ca system including 2 ternary compounds (τ1: Ca2Mg6Zn3, τ2; Ca1Mg3Zn6) has been considered. In order to assess thermodynamic parameters of ternary compound τ2, isothermal section and isopleths has been made by using DSC, DTA, XRD, SEM and TEM around the composition range of τ2. Calculated phase diagram of Mg-Zn-Ca ternary system has been studied with assessed ternary compound parameters. Solidification simulation via Scheil equation has been discussed with as-casted specimens and after heat treatment, and in particular invariant reactions have been compared with bulk glass form region.",

author = "Kyeong, {Joon Seok} and Lim, {Hyun Kyu} and Lee, {Hu Dam} and Kim, {Won Tae} and Kim, {Do Hyang} and Byeong JooLee",

year = "2009",

language = "English",

isbn = "9780873397308",

series = "Magnesium Technology",

pages = "167--172",

booktitle = "Magnesium Technology 2009",

note = "Magnesium Technology 2009 ; Conference date: 15-02-2009 Through 19-02-2009",

}

TY - GEN

T1 - Thermodynamic assessment and its application of ternary Mg-Zn-Ca system using CALPHAD method

AU - Kyeong, Joon Seok

AU - Lim, Hyun Kyu

AU - Lee, Hu Dam

AU - Kim, Won Tae

AU - Kim, Do Hyang

AU - JooLee, Byeong

PY - 2009

Y1 - 2009

N2 - Recently, Mg-Zn-Ca ternary system has been reported to have excellent creep resistance since addition of Ca form Mg2Ca with high thermal stability and addition of Zn induces solution hardening effect. However, complete thermodynamic study has not besn performed yet. In this study, phase equilibrium and thermodynamic study about Mg-Zn-Ca system including 2 ternary compounds (τ1: Ca2Mg6Zn3, τ2; Ca1Mg3Zn6) has been considered. In order to assess thermodynamic parameters of ternary compound τ2, isothermal section and isopleths has been made by using DSC, DTA, XRD, SEM and TEM around the composition range of τ2. Calculated phase diagram of Mg-Zn-Ca ternary system has been studied with assessed ternary compound parameters. Solidification simulation via Scheil equation has been discussed with as-casted specimens and after heat treatment, and in particular invariant reactions have been compared with bulk glass form region.

AB - Recently, Mg-Zn-Ca ternary system has been reported to have excellent creep resistance since addition of Ca form Mg2Ca with high thermal stability and addition of Zn induces solution hardening effect. However, complete thermodynamic study has not besn performed yet. In this study, phase equilibrium and thermodynamic study about Mg-Zn-Ca system including 2 ternary compounds (τ1: Ca2Mg6Zn3, τ2; Ca1Mg3Zn6) has been considered. In order to assess thermodynamic parameters of ternary compound τ2, isothermal section and isopleths has been made by using DSC, DTA, XRD, SEM and TEM around the composition range of τ2. Calculated phase diagram of Mg-Zn-Ca ternary system has been studied with assessed ternary compound parameters. Solidification simulation via Scheil equation has been discussed with as-casted specimens and after heat treatment, and in particular invariant reactions have been compared with bulk glass form region.

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M3 - Conference contribution

AN - SCOPUS:70349510787

SN - 9780873397308

T3 - Magnesium Technology

SP - 167

EP - 172

BT - Magnesium Technology 2009

T2 - Magnesium Technology 2009

Y2 - 15 February 2009 through 19 February 2009

ER -