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Features of Formation Stress State of Amorphized Detonation Coatings of the Zr-Al-B Systems

Pashechko Mykhaylo, Kharchenko Olena, Shchepetov Vitaliy, Lenik Klaudiusz, Gladkiy Yaroslav

Advances in Science and Technology. Research Journal

2019

Vol. 13, no 2

46--50

The results of experimental studies on the dependence of the thickness of amorphous-crystalline Zr-Al-B coatings on the value and level of distribution of type 1residual stresses were presented. It was demonstrated that residual compressive stresses arise in the surface layers of coatings, which in absolute value are not significant for its integrity and quality. It was established that the amorphous-crystalline composition, under the conditions of minimizing residual stresses and the optimal combination of the volume fraction of components, the structure and morphology of their components, has the best surface strength and wear resistance under friction compared to tungsten carbide and iron coatings

Cathodes with compound coating modified with metal oxides

Nawrat G., Gonet M., Szczepanik R.

Polish Journal of Chemical Technology

2003

Vol. 5, nr 3

61-64

The paper deals with investigations on the influence of the chemical composition of alloyed compound coatings modified with metal oxides. The effect of different additives on the physico-chemical properties of nickel electrodes covered with a coating of the alloy nickel-cobalt-phosphorus subjected to a test analysis in an alkaline solution with an addition of iron(III) salt as a substance poisoning the surface of the electrodes has been determined. As additives the following binary oxides were applied: RuO2-TiO2, TiO2-CeO2, Co3O4-CeO2, Co3O4-MnO2, Co3O4-Pt, Co3O4-RuO2. The highest electrochemical activity was achieved in the case of Co3O4-MnO2 coating.