Micromachining of magnetic materials

Citation
A. Kruusing et al., Micromachining of magnetic materials, SENS ACTU-A, 74(1-3), 1999, pp. 45-51
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Instrumentation & Measurement
Journal title
SENSORS AND ACTUATORS A-PHYSICAL
ISSN journal
0924-4247 → ACNP
Volume
74
Issue
1-3
Year of publication
1999
Pages
45 - 51
Database
ISI
SICI code
0924-4247(19990420)74:1-3<45:MOMM>2.0.ZU;2-I
Abstract
The results of an investigation of laser-cutting and EDM of NdFeB and MnZn ferrite are presented. Using a sub-microsecond-pulsed Nd:YAG laser (lambda = 1.06 mu m) at a repetition rate of 1 kHz and pulse energy of 1.8 mJ, the 0.5 mm thick ceramic NdFeB and ferrite plates were cut at a approximate spe ed of 1 mm/s in 6-8 passes. The cut width was in the range of 65 to 80 mu m in the case of NdFeB, and 30 to 50 mu m for ferrite. Cutting in water prov ided best cut quality and elimination of the debris compared to cutting in air. The cutting of the ferrite by pulsed laser beam was found to lead to c racking of the material and is not recommended. Wire EDM gave good results both for cutting of NdFeB and ferrite despite of relatively high resistivit y of the latter. Average surface roughness of cuts was 0.5 mu m. (C) 1999 E lsevier Science S.A. All rights reserved.