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The activation energies of crystallization in the amorphous alloy METGLAS 2826A

Journal of Materials Science, ISSN: 0022-2461, Vol: 16, Issue: 9, Page: 2405-2410
1981
  • 61
    Citations
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    Usage
  • 10
    Captures
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Metrics Details

  • Citations
    61
    • Citation Indexes
      61
  • Captures
    10

Article Description

Nucleation and growth rates of the MSI metastable phase crystals of the amorphous alloy FeNiCrPB have been studied in detail using quantitative transmission electron microscopy. Three different types of activation energies are involved in the crystallization:E for nucleation, E for growth of the crystals, and E for the whole process of crystallization. All three were determined experimentally:E and E in the present paper and E in a former work. A general formula was developed which combines the three and was found to be in good agreement with the experimental values. Furthermore, attention has been drawn to the experimental value of the Avrami exponent which is in very good agreement with a detailed theory developed in 1955 by Ilschner, and differing with common literature values. Also, the diffusivity of metalloid in this alloy has been reported using the growth rate of MSI crystals. © 1981 Chapman and Hall Ltd.

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