Effect of spinning condition on non-crystallinity of Fe77.5Si7.5B15 (at%) wire produced by in-rotating-water spinning method

Kyu Sang Cho, Hiroshi Takamatsu, Hiroshi Honda, Kenji Morinaga

Research output: Contribution to journalArticle

Abstract

The effect of spinning condition on the quality of Fe77.5Si7.5B15 (at%) wires produced by the In-Rotating-Water Spinning Method was examined experimentally. The diameter of the injection nozzle was 0.25 mm. Long continuous wires with round cross section were obtained when the molten-jet velocity νj was a little higher than the drum velocity νd, whereas the wire became meanderous with the increase in νjd. The heat of crystallization ΔH, which expresses the degree of non-crystallinity of the wire, remained almost constant for 0.77 < νjd < 1. For this case the wires were estimated to be almost amorphous judged from the X-ray diffraction pattern and the scanning electron micrograph. For 1 < νjd < 1.32, however, ΔH decreased with increasing νjd. The temperature distribution of the jet was measured by the photo-calorimetric method. For the water temperature of 10°C, the average cooling rate of the jet between 1470 to 1200 K, was found to be 6 × 104 to 9 × 104 K/s. The measured cooling rate did not show any correlation with ΔH. This indicated that the quality of the wire was determined by the cooling rate in the downstream region with a lower temperature.

Original languageEnglish
Pages (from-to)662-668
Number of pages7
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume62
Issue number7
DOIs
Publication statusPublished - Jan 1 1998

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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