Wüest M. 51 Wykes M. 82 Yamaguchi M. 17 Ybarra G. 129 Yubero F ...
Wüest M. 51 Wykes M. 82 Yamaguchi M. 17 Ybarra G. 129 Yubero F ...
Wüest M. 51 Wykes M. 82 Yamaguchi M. 17 Ybarra G. 129 Yubero F ...
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JUNE 26 MONDAY MORNING<br />
RIVA-TF.MoM-OR.5 LOW TEMPERATURE DEPOSITION OF TIB 2 ON X40<br />
CRMOV 5 1 STEEL SUBSTRATE BY DC MAGNETRON SPUTTERING. A. Duarte 1,2 *, B.<br />
Coelho 2 , M. Vila 2 , A.J.S. Fernandes 3 , F. Oliveira 2 , F.M. Costa 3 R.F. Silva 2 . 1 - Laboratório - F. Ramada,<br />
Aços e Industrias, S.A., Apartado 10, 3880-909 Ovar, Portugal. e-mail:<br />
paulo.duarte@ramada.pt 2 - CICECO - Dept. of Ceramics & Glass Engineering, University of Aveiro,<br />
3810-193 Aveiro- Portugal 3 - Dept. of Physics, University of Aveiro, 3810-193 Aveiro- Portugal<br />
Titanium diboride (TiB 2 ) films are being investigated due to their promising uses not only in electronic<br />
devices but also for mechanical purposes. Its excellent corrosion resistance and chemical stability,<br />
as well as high hardness and wear resistance makes TiB 2 particularly suitable for aluminium<br />
processing (e.g. extrusion, die-casting and machining). The major concern about protective coatings<br />
is lack of adhesion to the substrate arising from the high residual stresses developed during film<br />
deposition.<br />
In the present work TiB 2 coatings were produced by non-reactive magnetron sputtering from a TiB 2<br />
target on Orvar Supreme tool steel substrate (also know as AISI H13 premium or X40 CrMoV 5 1).<br />
Two different substrate types were used, similar to those frequently found on the aluminium injection<br />
industry: quenched and tempered/nitrided. The deposition parameters, namely the target/substrate<br />
distance, emission and bias currents, were varied in order to obtain adhered and well<br />
structured films, suiting the substrates composition and microstructure. The coatings were characterized<br />
by X-Ray diffraction, Scanning electron microscopy/EDS, Scratch test and AFM. The results<br />
obtained show that TiB 2 can be grown on the steel substrate at low temperature with high deposition<br />
rate keeping some crystallinity degree. Depending on the experimental parameters it is possible to<br />
coat hot work tool steel with adherent TiB 2 thin films by DC sputtering.<br />
*corresponding author<br />
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