Ultrasound-induced crystallization around the glass transition temperature for Pd40Ni40P20 metallic glass

Tetsu Ichitsubo, Eiichiro Matsubara, Satoshi Kai, Masahiko Hirao

研究成果: Article査読

60 被引用数 (Scopus)

抄録

We have found that crystallization of a Pd40Ni 40P20 bulk metallic glass is accelerated in the vicinity of the glass transition temperature Tg when it is subjected to sub/low-MHz frequency ultrasonic vibration. Resonance frequencies and internal frictions have been measured with the electromagnetic acoustic resonance (EMAR) technique. In the initial heating process of an as-cast glassy sample, the resonance frequencies jump up just above Tg under ultrasonic excitation, which is attributed to nano-crystallization that is confirmed by the X-ray diffraction profile. However, such a notable change is not observed without ultrasonic vibration. The irregular Λ-shaped internal-friction peaks are also observed prior to the abrupt crystallization. This rapid crystallization is considered to be caused by a stochastic resonance, in which the jump frequency of atoms matches the frequency of the interatomic-potential change by the ultrasonic vibration.

本文言語English
ページ(範囲)423-429
ページ数7
ジャーナルActa Materialia
52
2
DOI
出版ステータスPublished - 2004 1月 19

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • ポリマーおよびプラスチック
  • 金属および合金

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