Crystallization behavior of iron-based amorphous nanoparticles prepared sonochemically

Naoya Enomoto, Shingo Hirata, Miki Inada, Katsuro Hayashi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In general, a rapid quenching is required to obtain an amorphous metal. It is known that an intensive ultrasonication generates a very high temperature within cavitation bubbles in a very short moment, which enables a rapid quenching process in a liquid phase synthesis. In this study, the sonochemically-derived “amorphous iron” from Fe(CO)5 was carefully examined by XRD, TEM, TG-DTA. The product was found to be an amorphous containing a certain amount (∼15%) of volatile component that can be removed by heating in a nitrogen flow. After annealed in the inert atmosphere at 600 °C, cooled down to room temperature, and then exposed in air (oxygen), the sample showed a strong exotherm accompanied by a weight gain. This is due to oxidation of fine metallic iron. Experimental operations of such a reactive material were examined.

Original languageEnglish
Pages (from-to)563-568
Number of pages6
JournalUltrasonics Sonochemistry
Volume35
DOIs
Publication statusPublished - Mar 1 2017

Fingerprint

Crystallization
Nanoparticles
Rapid quenching
Iron
crystallization
iron
nanoparticles
Temperature
inert atmosphere
cavitation flow
Atmosphere
Heating
Weight Gain
thermal analysis
liquid phases
Nitrogen
bubbles
Metals
Air
Oxygen

All Science Journal Classification (ASJC) codes

  • Chemical Engineering (miscellaneous)
  • Environmental Chemistry
  • Radiology Nuclear Medicine and imaging
  • Acoustics and Ultrasonics
  • Organic Chemistry
  • Inorganic Chemistry

Cite this

Crystallization behavior of iron-based amorphous nanoparticles prepared sonochemically. / Enomoto, Naoya; Hirata, Shingo; Inada, Miki; Hayashi, Katsuro.

In: Ultrasonics Sonochemistry, Vol. 35, 01.03.2017, p. 563-568.

Research output: Contribution to journalArticle

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