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Contributions to Proceedings:

J. Kosel, L. Mehnen, E. Kaniusas, J. Tellez-Blanco, H. Pfützner, T Meydan, M Vazquez, M. Rohn, C Malvicino, B Marquardt, P Svec, P Duhaj:
"Manufacturing of Magnetostrictive Macro Bilayers";
in: "Soft Magnetic Materials - Volume 2", Verlag Stahleisen, Düsseldorf, 2004, ISBN: 3-514-00711-x, 621 - 626.



English abstract:
This paper concerns the manufacturing of magnetostrictive macro-BLs where a force-transmitting mechanical connection between materials of different properties has to be established. The BLs consist of a magnetostrictive layer (ML) and a counter layer (CL) and are sensitive to bending or temperature. In our work we classify the manufacturing in a (i) direct procedure, where the BLs are produced in one step, and (ii) indirect procedures equivalent to a stepwise BL production. The double nozzle technique, a direct procedure, is introduced for the production of BLs consisting of two materials with controversial magnetic behaviour and even different structure. Indirect procedures are more conventional methods like soldering, welding and gluing. Experiments with soldering and welding show problems due to the involved high temperatures leading to crystallisation of amorphous ML thus reducing the sensitivity. This difficulty was partly overcome with the help of laser spot welding. Gluing is the most flexible manufacturing procedure, but the glue layer acts as a 3rd layer which influences the sensitivity according to its thickness dGL, its elasticity and due to additionally induced internal stresses. In fact, dGL shows a complex role: On the one hand, it is equivalent to an increased CL thickness and thus yields higher sensitivity. On the other hand, it leads to an increased distortion reducing the sensitivity. We present an agglutination method where dGL can be varied for optimization, and the induced internal stresses are minimized.


Online library catalogue of the TU Vienna:
http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC04968015


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