AC charging/discharging of de-alloyed Si-Al-V alloy ribbons

M. Fukuhara, H. Yoshida

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

In anticipation of prompt ac charging/discharging characteristics, the capacitance of de-alloyed Si1-x(Al0.5,V 0.5)x (x = 0.15, 0.2, 0.3, and 0.4) alloy ribbons with resistivities of 0.01-4300 Ωcm was measured as a function of frequency between 1 mHz and 1 MHz, using exponential transient analysis for electric charging/discharging. The capacitance of de-alloyed Si-7.5 at.%.Al-7.5 at.%. V obtained by prompt (100 ms-25 ns) charging/discharging decreased logarithmically from 105 μF to 18 pF as frequency increased from 1 mHz to 10 kHz, and then saturated between 10 kHz and 1 MHz. From the observed electrode distance dependence on capacitance, we deduced that the alloy consisted of a distributed constant equivalent circuit (series with 1.2% parallel), analogous to electric double layer capacitors.

Original languageEnglish
Pages (from-to)S130-S133
JournalJournal of Alloys and Compounds
Volume586
Issue numberSUPPL. 1
DOIs
Publication statusPublished - 2014

Keywords

  • Capacitance spectroscopy
  • Dielectric response
  • Metals and alloys
  • Quenching
  • Rapid-solidification

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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