Enhancement of the thermal stability of the amorphous structure by addition of Y in Al-Ca-Ni alloy

Yeong Seong Kim; Won Tae Kim; Do Hyang Kim

doi:10.1016/j.jallcom.2018.11.323

Enhancement of the thermal stability of the amorphous structure by addition of Y in Al-Ca-Ni alloy

Yeong Seong Kim, Won Tae Kim, Do Hyang Kim

Department of Materials Science and Engineering

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

3 Citations (Scopus)

Abstract

The enhancement of the thermal stability of the amorphous structure in Al-Ca-Ni alloy has been investigated in two steps: 1) selection of ternary Al-Ca-Ni composition; and 2) effect of addition of Y. The thermal stability of the amorphous structure is significantly improved by the addition of Y in Al_87.5Ca_7.5Ni₅ alloy. Among the alloys investigated in the present study, i.e. (Al_87.5Ca_7.5Ni₅)_100-xY_x (x = 0, 1, 2, 3 and 4 at%), alloys with ≥2 at% Y exhibit glass transition behavior during heating and viscosity drop at the supercooled liquid region. The activation energy for the first-step crystallization increases with increasing Y amount, i.e. from 167 kJ/mol for Y = 0 at% alloy to 347 kJ/mol for Y = 4 at% alloy, indicating that the thermal stability of the amorphous structure is improved with Y addition. The increase of activation energy for crystallization may be due to the change of crystallization mode depending on Y amount; eutectic crystallization (Y = 0 at%) → polymorphic crystallization (Y = 2 at%) → primary crystallization (Y = 4 at%).

Original language	English
Pages (from-to)	805-812
Number of pages	8
Journal	Journal of Alloys and Compounds
Volume	779
DOIs	https://doi.org/10.1016/j.jallcom.2018.11.323
Publication status	Published - 2019 Mar 30

Bibliographical note

Funding Information:
This research was supported by Basic Science Research Program through the National Research Foundation by the Ministry of Science, ICT and future Planning ( 2016R1A2B2013838 ). W.T. Kim acknowledges the support from Cheongju University through 2017 sabbatical leave program.

Publisher Copyright:
© 2018 Elsevier B.V.

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2018.11.323

Cite this

@article{96bb01d8fc644fea84f9d5ac10c9f9ad,

title = "Enhancement of the thermal stability of the amorphous structure by addition of Y in Al-Ca-Ni alloy",

abstract = "The enhancement of the thermal stability of the amorphous structure in Al-Ca-Ni alloy has been investigated in two steps: 1) selection of ternary Al-Ca-Ni composition; and 2) effect of addition of Y. The thermal stability of the amorphous structure is significantly improved by the addition of Y in Al87.5Ca7.5Ni5 alloy. Among the alloys investigated in the present study, i.e. (Al87.5Ca7.5Ni5)100-xYx (x = 0, 1, 2, 3 and 4 at%), alloys with ≥2 at% Y exhibit glass transition behavior during heating and viscosity drop at the supercooled liquid region. The activation energy for the first-step crystallization increases with increasing Y amount, i.e. from 167 kJ/mol for Y = 0 at% alloy to 347 kJ/mol for Y = 4 at% alloy, indicating that the thermal stability of the amorphous structure is improved with Y addition. The increase of activation energy for crystallization may be due to the change of crystallization mode depending on Y amount; eutectic crystallization (Y = 0 at%) → polymorphic crystallization (Y = 2 at%) → primary crystallization (Y = 4 at%).",

author = "Kim, {Yeong Seong} and Kim, {Won Tae} and Kim, {Do Hyang}",

note = "Funding Information: This research was supported by Basic Science Research Program through the National Research Foundation by the Ministry of Science, ICT and future Planning ( 2016R1A2B2013838 ). W.T. Kim acknowledges the support from Cheongju University through 2017 sabbatical leave program. Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2019",

month = mar,

day = "30",

doi = "10.1016/j.jallcom.2018.11.323",

language = "English",

volume = "779",

pages = "805--812",

journal = "Journal of the Less-Common Metals",

issn = "0925-8388",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Enhancement of the thermal stability of the amorphous structure by addition of Y in Al-Ca-Ni alloy

AU - Kim, Yeong Seong

AU - Kim, Won Tae

AU - Kim, Do Hyang

N1 - Funding Information: This research was supported by Basic Science Research Program through the National Research Foundation by the Ministry of Science, ICT and future Planning ( 2016R1A2B2013838 ). W.T. Kim acknowledges the support from Cheongju University through 2017 sabbatical leave program. Publisher Copyright: © 2018 Elsevier B.V.

PY - 2019/3/30

Y1 - 2019/3/30

N2 - The enhancement of the thermal stability of the amorphous structure in Al-Ca-Ni alloy has been investigated in two steps: 1) selection of ternary Al-Ca-Ni composition; and 2) effect of addition of Y. The thermal stability of the amorphous structure is significantly improved by the addition of Y in Al87.5Ca7.5Ni5 alloy. Among the alloys investigated in the present study, i.e. (Al87.5Ca7.5Ni5)100-xYx (x = 0, 1, 2, 3 and 4 at%), alloys with ≥2 at% Y exhibit glass transition behavior during heating and viscosity drop at the supercooled liquid region. The activation energy for the first-step crystallization increases with increasing Y amount, i.e. from 167 kJ/mol for Y = 0 at% alloy to 347 kJ/mol for Y = 4 at% alloy, indicating that the thermal stability of the amorphous structure is improved with Y addition. The increase of activation energy for crystallization may be due to the change of crystallization mode depending on Y amount; eutectic crystallization (Y = 0 at%) → polymorphic crystallization (Y = 2 at%) → primary crystallization (Y = 4 at%).

AB - The enhancement of the thermal stability of the amorphous structure in Al-Ca-Ni alloy has been investigated in two steps: 1) selection of ternary Al-Ca-Ni composition; and 2) effect of addition of Y. The thermal stability of the amorphous structure is significantly improved by the addition of Y in Al87.5Ca7.5Ni5 alloy. Among the alloys investigated in the present study, i.e. (Al87.5Ca7.5Ni5)100-xYx (x = 0, 1, 2, 3 and 4 at%), alloys with ≥2 at% Y exhibit glass transition behavior during heating and viscosity drop at the supercooled liquid region. The activation energy for the first-step crystallization increases with increasing Y amount, i.e. from 167 kJ/mol for Y = 0 at% alloy to 347 kJ/mol for Y = 4 at% alloy, indicating that the thermal stability of the amorphous structure is improved with Y addition. The increase of activation energy for crystallization may be due to the change of crystallization mode depending on Y amount; eutectic crystallization (Y = 0 at%) → polymorphic crystallization (Y = 2 at%) → primary crystallization (Y = 4 at%).

UR - http://www.scopus.com/inward/record.url?scp=85057893002&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85057893002&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2018.11.323

DO - 10.1016/j.jallcom.2018.11.323

M3 - Article

AN - SCOPUS:85057893002

SN - 0925-8388

VL - 779

SP - 805

EP - 812

JO - Journal of the Less-Common Metals

JF - Journal of the Less-Common Metals

ER -

Enhancement of the thermal stability of the amorphous structure by addition of Y in Al-Ca-Ni alloy

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this