The application of a tensile stress during electron beam and laser cutting of amorphous alloy ribbon has successfully improved edge quality by eliminating melt bending. The tensile force also acts to reduce the energy requirements of cutting since the ribbon is severed by solid-state deformation before melting. Ribbons of amorphous Fe78B13Si9 0.5 cm wide can be severed in 0.1 s using a tensile parting load of 2.0 kg and a 50 W pulsed mode CO2 laser. The dependence of cutting time on laser power was established as d(ln P)/d(ln t) = −0.5.

Exchange anisotropy was recently proposed as the origin of uniaxial perpendicular anisotropy in some RE-TM thin films. This magnetic anisotropy arises from the exchange interaction between the ferrimagnetic matrix and acicular shaped single domain ferromagnetic regions. Rotational hysteresis measurements on GdCo films show a non-vanishing value of the rotational magnetic hysteresis for magnetic fi...

Chemischer InformationsdienstVolume 12, Issue 3 Reviews ChemInform Abstract: AMORPHOUS MATERIALS - A NEW CLASS OF SOFT MAGNETIC ALLOYS (27 LITERATURANGABEN) F. E. LUBORSKY, F. E. LUBORSKYSearch for more papers by this authorP. G. FRISCHMANN, P. G. FRISCHMANNSearch for more papers by this authorL. A. JOHNSON, L. A. JOHNSONSearch for more papers by this author F. E. LUBORSKY, F. E. LUBORSKYSearch for more papers by this authorP. G. FRISCHMANN, P. G. FRISCHMANNSearch for more papers by this authorL. A. JOHNSON, L. A. JOHNSONSearch for more papers by this author First published: January 20, 1981 https://doi.org/10.1002/chin.198103328Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume12, Issue3January 20, 1981 RelatedInformation

The a.c. magnetic properties measured at 60 Hz are found to be strongly affected by ribbon thickness and annealing temperature. These magnetic results are further characterized by observations on magnetic domain structure, crystallization, stress relaxation, and ribbon surface finish.

The key events in the development of amorphous alloys are briefly summarized within the context of applying them as soft magnetic alloys. Some of their pertinent magnetic properties, such as saturation magnetization, losses, exciting current, permeability and stress sensitivity are reviewed and compared with conventional alloys. New results on iron-rich alloys will be presented. We have recently discovered that increasing the diameter of the toroid prepared from narrow tapes produces a remarkable improvement in the magnetic properties attributable to the decreasing contribution of stress induced ordering. The losses become significantly less than the best results reported for the Permalloys and are much less than 1/10 the losses of Fe−3.2% Si.

Amorphous alloys have the demonstrated potential of replacing the iron-silicon alloys presently used in both large and small transformers to provide substantially lower losses and higher permeabilities. In addition the properties are competitive with the Fe-Ni alloys used in small electronic applications for inductors, sensors and transformers and will certainly replace the Fe-Ni in many of these applications as the low cost potential of the amorphous alloys is realized. New applications have also been demonstrated which make use of their magnetostrictive properties combined with their excellent mechanical properties. The material characteristics leading to these possibilities will be described.

Amorphous alloys have potential applications in all types of magnetic devices, in both the electronic and power areas of application. For electronic devices, the properties are comparable to those of commercial alloys and the materials offer potentially much lower cost. In power applications such as transformers, losses are far lower than in materials used at present. This results in a potential favorable trade-off between first cost and a substantial energy savings throughout the life of the device. Although power applications have not been emphasized up to now, they appear to hold great promise, especially as wider amorphous tapes become available.

Cube textured magnetic sheet containing approximately 3% silicon in iron has been developed in the General Electric Company Research Laboratory. The magnitude of the cube texture as determined by torque magnetometer tests is of the order of 90% or greater when compared to a single crystal with a (100) [001] orientation. The magnitude of the texture was confirmed by x-ray diffraction pole figures. Static dc magnetic tests and 60 cycle ac w loss tests made on single strip samples taken both parallel to the rolling direction and at right angles to the rolling direction indicate nearly equal magnetic properties in both directions of the sheet. These properties are equivalent to the magnetic properties measured in the single good direction of the ``grain oriented'' transformer material. Finally, two transformers were made: one using laminations of the cube textured silicon iron, the other of the ``grain oriented'' material. It was found that transformer made of the cube textured material produced significantly lower energy losses at all inductions and at 17 000 gauss the losses were approximately 60% of the losses produced by the ``grain oriented'' transformer. Similarly the current required to produce 17 000 gauss in the cube textured transformer was again about half that required to excite the ``grain oriented'' transformer to the same induction.