A d.c. Joule heating technique allows new application-oriented crystallization products to be obtained from amorphous metallic ribbons under controlled conditions. The structural changes occurring in a material are continuously monitored through on-line measurements of the electrical resistance. Sample crystallization is often marked by a typical resistance bump. A general solution of the equation describing the evolution of the sample temperature and resistance in the course of d.c. Joule heating is found. The crystallization of Fe40Ni40B20, characterized by a strong emission of heat, is treated in detail. Specific parameters of the process are properly determined from a comparison with experimental results. The role of the transfer rate of the crystallization heat to the sample is briefly discussed.
|Titolo:||An Exact Model of Dc Joule Heating In Amorphous Metallic Ribbons|
|Data di pubblicazione:||1994|
|Digital Object Identifier (DOI):||10.1016/0921-5093(94)90227-5|
|Appare nelle tipologie:||1.1 Articolo in rivista|
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