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 28 WEDNESDAY AFTERNOON<br />
JS2-WeA-P.5 ELABORATION AND CHARACTERIZATION OF THIN TITANIUM<br />
COATINGS ON HIGH CARBON STEEL SUBSTRATES. L. Mohammedi. Laboratory of Materials<br />
Physic. University of Ouargla – 30 000 – Algeria. R. Gheriani. Laboratory of Materials Physic.<br />
University of Ouargla – 30 000 – Algeria. R. Halimi. Laboratoire Couches Minces et Interfaces, Campus<br />
Chaâb Erssas, Université Mentouri de Constantine - 25 000 Constantine – Algérie.<br />
In this work we have elaborated, by cathodic sputtering, thin titanium coatings on steel substrates containing<br />
≈ 2% Wt of carbon. The so prepared samples are submitted to various thermal anneals in vacuum<br />
between 400°C and 1000°C, and then characterized structurally and mechanically by X-ray diffraction<br />
(XRD), scanning electron microscopy (SEM), Auger electron spectroscopy (AES) and hardness<br />
tests. The analysis of samples showed the formation and the growth of titanium carbide above<br />
400°C. It is established that carbon, iron and titanium atoms interdiffuse intensively, and form a diffusion<br />
zone which is, roughly, homogeneous and essentially constituted from titanium carbide. This new<br />
layer presents a good performances (for example, at 900°C, the value of microhardness is H v = 3200<br />
kg mm -2 , which is larger than that of bulk TiC H v = 3000 kg mm -2 ).<br />
Key words: thin films, hard coatings, carbide, diffusion, titanium<br />
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