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Cutting tool performance enhancement by using a B4C/BCN/C-BN multilayer system

Gaitan, G. B. and Caicedo, J. C. and Priet, P. and Balogh, Adam G. :
Cutting tool performance enhancement by using a B4C/BCN/C-BN multilayer system.
In: Physica Status Solidi C, 4 (11) pp. 4282-4287.
[Article] , (2007)

Abstract

Thin films of B4C/BCN/c-BN multilayers were deposited on to AISI M2 high speed steel substrates by r.f. (13.56 MHz) multi-target magnetron sputtering from high purity (99.99 %) h-BN and a (99.5%) B4C target, in an Ar (90%)/N2 (10%) gas mixture. For their deposition we varied the bias voltage of the B4C films between –50 and –250 V and, for the BCN coatings the nitrogen gas flow from 3% to 12%. A 300-nm thick TiN buffer layer was first deposited to improve the adhesion of all samples. Mechanical properties like hardness, elastic Young modulus, and adhesion were determined by nanoindentation and scratch measurements. Finally, cutting tools were coated with 2, 5, 12, and 16 bilayers of B4C/BCN/c-BN. Machining tests on steel bars and plates were carried out. Tool performance was registered as functions of bilayer numbers showed enhancement between 60% and 107% and a surface roughness reduction of 60% for cutting tools coated with 16 bilayers, compared to uncoated tools.

Item Type: Article
Erschienen: 2007
Creators: Gaitan, G. B. and Caicedo, J. C. and Priet, P. and Balogh, Adam G.
Title: Cutting tool performance enhancement by using a B4C/BCN/C-BN multilayer system
Language: English
Abstract:

Thin films of B4C/BCN/c-BN multilayers were deposited on to AISI M2 high speed steel substrates by r.f. (13.56 MHz) multi-target magnetron sputtering from high purity (99.99 %) h-BN and a (99.5%) B4C target, in an Ar (90%)/N2 (10%) gas mixture. For their deposition we varied the bias voltage of the B4C films between –50 and –250 V and, for the BCN coatings the nitrogen gas flow from 3% to 12%. A 300-nm thick TiN buffer layer was first deposited to improve the adhesion of all samples. Mechanical properties like hardness, elastic Young modulus, and adhesion were determined by nanoindentation and scratch measurements. Finally, cutting tools were coated with 2, 5, 12, and 16 bilayers of B4C/BCN/c-BN. Machining tests on steel bars and plates were carried out. Tool performance was registered as functions of bilayer numbers showed enhancement between 60% and 107% and a surface roughness reduction of 60% for cutting tools coated with 16 bilayers, compared to uncoated tools.

Journal or Publication Title: Physica Status Solidi C
Volume: 4
Number: 11
Uncontrolled Keywords: 62.20.Qp; 68.55.-a; 68.60.Bs; 68.65.Ac; 81.15.Cd; 81.65.Lp
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Material Analytics
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 20 Nov 2008 08:28
Funders: This work was supported by the Technological Development Center ASTIN-SENA, Cali Colombia,, This work was supported by the Institute of Materials Science, Darmstadt University of Technology, Germany, This work was supported by COLCIENCIAS through the Excellence Center for Novel Materials (CENM) Universidad del Valle, Colombia.
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