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Deposition and Analysis of DLC Thin Films Obtained on 7075 Aluminum Alloy

100%

Kuffova M. , Marton M. , Kottfer D. , Rehak F.

Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa

2017

tom Vol. 8, Nr 3 (29)

33--42

In this study a-C:H (hydrogenated amorphous carbon) thin films were deposited on the 7075 Al alloy without and with admixture gas (N2) using a DC CVD (direct current chemical vapor deposition) method. The structural and mechanical properties were analyzed using Raman spectroscopy, SEM and nanoindentation. We obtained hardness of a-C:H thin film without and with N2 equal to 27.3 GPa and 21.4 GPa, respectively. Values of the Young’s modulus were equal to 135.5 GPa and 205.2 GPa, respectively.

Evaluating the replacement of galvanic Cr coatings

75%

Trebuna P. , Kottfer D. , Pekarcikova M. , Petrikova A. , Popovic R. , Rehak F. , Ciznar P.

Polish Journal of Environmental Studies

2018

tom 27

nr 3

Our paper deals with the possibility of replacing galvanic chrome coatings with thermal spraying, specifically with the high-velocity oxy-fuel coating spraying (HVOF) method. The article provides an analysis of alternatives compensation, mutual comparison of thermal spraying methods, and the choice of the most appropriate method for replacing galvanic chrome plating. Increased pressure on health and the environment necessitates the replacement of conventional galvanic plating process solution with hexavalent chromium Cr6+ by using environmentally friendly technology.