Effect of relaxation state on nucleation and grain growth of nanoscale quasicrystal in Zr-based bulk metallic glasses prepared under various cooling rates

Junji Saida; Albertus Deny Setyawan; Eiichiro Matsubara

doi:10.1063/1.3622117

Effect of relaxation state on nucleation and grain growth of nanoscale quasicrystal in Zr-based bulk metallic glasses prepared under various cooling rates

Junji Saida, Albertus Deny Setyawan, Eiichiro Matsubara

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Abstract

Zr ₆₅Al _7.5Ni ₁₀Cu _12.5Pd ₅ bulk metallic glasses (BMGs) in various relaxation states were prepared under different cooling rates. The grain growth rate of the primary quasicrystal was examined near the crystallization temperature. It was approximately 1 × 10 ^-9 m/s in less relaxed BMGs and approximately twice as large in relaxed BMGs. In contrast, the calculated homogeneous nucleation rate of the less relaxed samples was five to ten times higher (5 × 10 ¹⁹-1 × 10 ²⁰/m ³s) than those in the relaxed BMGs. The results indicate that the relaxation state of glassy alloys has a marked effect on nucleation and grain growth behaviors.

Original language	English
Article number	061903
Journal	Applied Physics Letters
Volume	99
Issue number	6
DOIs	https://doi.org/10.1063/1.3622117
Publication status	Published - 2011 Aug 8

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title = "Effect of relaxation state on nucleation and grain growth of nanoscale quasicrystal in Zr-based bulk metallic glasses prepared under various cooling rates",

abstract = "Zr 65Al 7.5Ni 10Cu 12.5Pd 5 bulk metallic glasses (BMGs) in various relaxation states were prepared under different cooling rates. The grain growth rate of the primary quasicrystal was examined near the crystallization temperature. It was approximately 1 × 10 -9 m/s in less relaxed BMGs and approximately twice as large in relaxed BMGs. In contrast, the calculated homogeneous nucleation rate of the less relaxed samples was five to ten times higher (5 × 10 19-1 × 10 20/m 3s) than those in the relaxed BMGs. The results indicate that the relaxation state of glassy alloys has a marked effect on nucleation and grain growth behaviors.",

author = "Junji Saida and {Deny Setyawan}, Albertus and Eiichiro Matsubara",

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T1 - Effect of relaxation state on nucleation and grain growth of nanoscale quasicrystal in Zr-based bulk metallic glasses prepared under various cooling rates

AU - Saida, Junji

AU - Deny Setyawan, Albertus

AU - Matsubara, Eiichiro

N1 - Funding Information: This work has been supported by a Grant-in-Aid of the Ministry of Education, Sports, Culture, Science and Technology, Japan, Scientific Research (A).

PY - 2011/8/8

Y1 - 2011/8/8

N2 - Zr 65Al 7.5Ni 10Cu 12.5Pd 5 bulk metallic glasses (BMGs) in various relaxation states were prepared under different cooling rates. The grain growth rate of the primary quasicrystal was examined near the crystallization temperature. It was approximately 1 × 10 -9 m/s in less relaxed BMGs and approximately twice as large in relaxed BMGs. In contrast, the calculated homogeneous nucleation rate of the less relaxed samples was five to ten times higher (5 × 10 19-1 × 10 20/m 3s) than those in the relaxed BMGs. The results indicate that the relaxation state of glassy alloys has a marked effect on nucleation and grain growth behaviors.

AB - Zr 65Al 7.5Ni 10Cu 12.5Pd 5 bulk metallic glasses (BMGs) in various relaxation states were prepared under different cooling rates. The grain growth rate of the primary quasicrystal was examined near the crystallization temperature. It was approximately 1 × 10 -9 m/s in less relaxed BMGs and approximately twice as large in relaxed BMGs. In contrast, the calculated homogeneous nucleation rate of the less relaxed samples was five to ten times higher (5 × 10 19-1 × 10 20/m 3s) than those in the relaxed BMGs. The results indicate that the relaxation state of glassy alloys has a marked effect on nucleation and grain growth behaviors.

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Effect of relaxation state on nucleation and grain growth of nanoscale quasicrystal in Zr-based bulk metallic glasses prepared under various cooling rates

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