Production Of CrN/NbN Superlattice Coatings By Cathode Switching
Reactive Cathodic Arc Evaporation
Author(s)
C. Pecchio, E. Bemporad, D. De Felicis, S. De Rossi & F. Carassiti
Abstract
Production of CrNINbN superlattice coatings
by cathode switching reactive cathodic arc
evaporation
C. ~ecchio', E. ~ e r n ~ o r a d ~ , D. De ~ e l i c i s ~ , S. De ~ o s s i '
& F. carassiti2
I Surface Engineering Dept, Istituto Scientijico Breda S.p.A., Italy
2 Mechanical and Industrial Engineering dept., Univ. "ROMA TRE"
Italy
Abstract
CrN/NbN superlattice and CrN coatings, approximately 3 pm in thickness, have
been deposited on tool steel samples by a modified reactive cathodic arc
evaporation technique (CAE) in an industrial-size chamber. Superlattice
deposition was achieved by triggering alternatively on Cr and Nb cathodes,
obtaining layers of about 4-5 nanometers. X-ray diffraction, scanning and
transmission electron microscopy, atomic force microscopy and energy
dispersive X-ray analysis were used to determine microstructure and chemical
composition of both coatings and coating defects. Diffraction techniques
showed for the CrN coating a (220) preferred orientation and a strongly
p
Keywords
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