Thermal stability and crystallization kinetics of Mg-Cu-Y-B quaternary alloys

Y. T. Cheng; T. H. Hung; J. C. Huang; P. J. Hsieh; J. S.C. Jang

doi:10.1016/j.msea.2006.02.367

Thermal stability and crystallization kinetics of Mg-Cu-Y-B quaternary alloys

Y. T. Cheng, T. H. Hung, J. C. Huang, P. J. Hsieh, J. S.C. Jang

Graduate Institute of Materials Science and Engineering

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

15 Scopus citations

Abstract

The thermal stability and crystallization kinetics of the Mg₆₅Cu₂₅Y₁₀ and Mg₆₅Cu_25-xY₁₀B_x (numbers indicate at.%, x = 1-10) amorphous alloys are examined and compared in terms of non-isothermal and isothermal differential scanning calorimetry measurements. It is demonstrated that, with the minor addition of 1-5 at.% B, the incubation time for crystallization is prolonged and the activation energy is increased, suggesting an improvement of the thermal stability. Nevertheless, the overall nucleation and growth characteristics of the parent and B-additive alloys are similar. The minor B element appears to impose resistance to the crystallization of the major Mg₂Cu phase, possibly by blocking the path of Mg and Cu diffusion. With further addition of B upto 10 at.%, secondary crystallization phases such as MgB₄ or YB would be induced and thus lower the thermal stability.

Original language	English
Pages (from-to)	501-505
Number of pages	5
Journal	Materials Science and Engineering A
Volume	449-451
DOIs	https://doi.org/10.1016/j.msea.2006.02.367
State	Published - 25 Mar 2007

Keywords

Activation energy
Crystallization kinetics
Mg-Cu-Y-B amorphous alloy

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10.1016/j.msea.2006.02.367

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title = "Thermal stability and crystallization kinetics of Mg-Cu-Y-B quaternary alloys",

abstract = "The thermal stability and crystallization kinetics of the Mg65Cu25Y10 and Mg65Cu25-xY10Bx (numbers indicate at.%, x = 1-10) amorphous alloys are examined and compared in terms of non-isothermal and isothermal differential scanning calorimetry measurements. It is demonstrated that, with the minor addition of 1-5 at.% B, the incubation time for crystallization is prolonged and the activation energy is increased, suggesting an improvement of the thermal stability. Nevertheless, the overall nucleation and growth characteristics of the parent and B-additive alloys are similar. The minor B element appears to impose resistance to the crystallization of the major Mg2Cu phase, possibly by blocking the path of Mg and Cu diffusion. With further addition of B upto 10 at.%, secondary crystallization phases such as MgB4 or YB would be induced and thus lower the thermal stability.",

keywords = "Activation energy, Crystallization kinetics, Mg-Cu-Y-B amorphous alloy",

author = "Cheng, {Y. T.} and Hung, {T. H.} and Huang, {J. C.} and Hsieh, {P. J.} and Jang, {J. S.C.}",

note = "Funding Information: The authors gratefully acknowledge the sponsorship by National Science Council of Taiwan, ROC, under the project no. NSC 93-2216-E-110-021.",

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T1 - Thermal stability and crystallization kinetics of Mg-Cu-Y-B quaternary alloys

AU - Cheng, Y. T.

AU - Hung, T. H.

AU - Huang, J. C.

AU - Hsieh, P. J.

AU - Jang, J. S.C.

N1 - Funding Information: The authors gratefully acknowledge the sponsorship by National Science Council of Taiwan, ROC, under the project no. NSC 93-2216-E-110-021.

PY - 2007/3/25

Y1 - 2007/3/25

N2 - The thermal stability and crystallization kinetics of the Mg65Cu25Y10 and Mg65Cu25-xY10Bx (numbers indicate at.%, x = 1-10) amorphous alloys are examined and compared in terms of non-isothermal and isothermal differential scanning calorimetry measurements. It is demonstrated that, with the minor addition of 1-5 at.% B, the incubation time for crystallization is prolonged and the activation energy is increased, suggesting an improvement of the thermal stability. Nevertheless, the overall nucleation and growth characteristics of the parent and B-additive alloys are similar. The minor B element appears to impose resistance to the crystallization of the major Mg2Cu phase, possibly by blocking the path of Mg and Cu diffusion. With further addition of B upto 10 at.%, secondary crystallization phases such as MgB4 or YB would be induced and thus lower the thermal stability.

AB - The thermal stability and crystallization kinetics of the Mg65Cu25Y10 and Mg65Cu25-xY10Bx (numbers indicate at.%, x = 1-10) amorphous alloys are examined and compared in terms of non-isothermal and isothermal differential scanning calorimetry measurements. It is demonstrated that, with the minor addition of 1-5 at.% B, the incubation time for crystallization is prolonged and the activation energy is increased, suggesting an improvement of the thermal stability. Nevertheless, the overall nucleation and growth characteristics of the parent and B-additive alloys are similar. The minor B element appears to impose resistance to the crystallization of the major Mg2Cu phase, possibly by blocking the path of Mg and Cu diffusion. With further addition of B upto 10 at.%, secondary crystallization phases such as MgB4 or YB would be induced and thus lower the thermal stability.

KW - Activation energy

KW - Crystallization kinetics

KW - Mg-Cu-Y-B amorphous alloy

UR - http://www.scopus.com/inward/record.url?scp=33847192051&partnerID=8YFLogxK

U2 - 10.1016/j.msea.2006.02.367

DO - 10.1016/j.msea.2006.02.367

M3 - 期刊論文

AN - SCOPUS:33847192051

SN - 0921-5093

VL - 449-451

SP - 501

EP - 505

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

ER -

Thermal stability and crystallization kinetics of Mg-Cu-Y-B quaternary alloys

Abstract

Keywords

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