ANNEALING OF METALLIC GLASS TRANSFORMER CORE ALLOY

Authors
  1. Dunlap, R.A.
  2. Wang, Z.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Dalhousie Univ, Halifax NS (CAN) Dept of Physics
Abstract
A flextensional sonar projector powered by the magnetostricive alloy Terfenol is under development at Defence Research Establishment Atlantic. The design of this transducer requires the use of a low reluctance magnetic flux return path in the magnetic circuit used to energize the device. The amorphous alloys known under the trade name Metglas are candidates for this application. This report summarizes measurements undertaken at Dalhousie University to characterize a sample of Metglas 2605TCA obtained from Allied Signal Corporation. Measurements described include density, electrical resistivity, X-ray diffraction, and differential thermal analysis. A suitable range of annealing temperatures and conditions to optimize the magnetic properties was established on the basis of studies reported in the literature, as well as measurements of Curie temperature and crystallization temperature. Magnetic hysteresis studies of annealed samples were made to assess the suitability of the heat treatment. The construction of flux return path elements for use with the Terfenol powdered projector are described.
Keywords
Amorphous alloys;Metallic glasses;Terfenol;Transformer core alloy;Metglas
Report Number
DREA-CR-93-425 — Contractor Report
Date of publication
31 Mar 1993
Number of Pages
52
DSTKIM No
94-00426
CANDIS No
136336
Format(s):
Hardcopy;Originator's fiche received by DSIS

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