http://arthra.ugal.ro/handle/20.500.14043/25841 2026-04-19T11:30:13Z 2026-04-19T11:30:13Z Țugui, Cătălin-Andrei Vizireanu, Petrică Nejneru, Carmen Perju, Manuela-Cristina Axinte, Mihai Bălțatu, Simona-Mădălina http://arthra.ugal.ro/handle/20.500.14043/25851 2020-09-03T13:27:50Z 2015-01-01T00:00:00Z

Deposition Technologies for Obtaining thin Films with Special Properties Țugui, Cătălin-Andrei; Vizireanu, Petrică; Nejneru, Carmen; Perju, Manuela-Cristina; Axinte, Mihai; Bălțatu, Simona-Mădălina The properties of metallic materials can be improved by deposition of materials. The coating has a tear strength and better hydro-abrasive corrosion. The thin layer deposition has a thickness of less than 10 micrometers. When speaking about deposition technologies, it is not just about deposited thin layers, but the whole assembly (layer / substrate), therefore the degree of adherence and the costs of making such a substrate have to be taken into account and the whole must be much more powerful than anything taken separately. In this paper we presented several methods of thin film deposition. We also highlighted some of the advantages and disadvantages of several deposition methods. The Annals of "Dunarea de Jos" University of Galati Fascicle IX Metallurgy and Materials Science No. 3 - 2015, ISSN 1453 – 083X

2015-01-01T00:00:00Z Neacșu, Marian-Iulian Hanganu, Doru http://arthra.ugal.ro/handle/20.500.14043/25850 2020-09-03T13:27:50Z 2015-01-01T00:00:00Z

Optimization of Thermal Processing Parameters of a High Strength Aluminum Alloy Neacșu, Marian-Iulian; Hanganu, Doru The work shows a calculation meant to optimize the thermal processing parameters (time and temperature) of a high strength aluminum alloy. The optimization calculation has been done by gradient method which involves multistep (iteration) calculation of thermal processing parameters in which the values of the mechanical properties meet certain restrictions imposed. Identifying the most economic variants of heat treatment of those resulting from the application of gradient method was carried out by performing calculations of heat balance of the heat-treatment oven. The Annals of "Dunarea de Jos" University of Galati Fascicle IX Metallurgy and Materials Science No. 3 - 2015, ISSN 1453 – 083X

2015-01-01T00:00:00Z Boiciuc, Simona http://arthra.ugal.ro/handle/20.500.14043/25849 2020-09-03T13:27:50Z 2015-01-01T00:00:00Z

Laser Deposition of Bronze Aluminum on Steel Support Boiciuc, Simona In order to rise the wear and corrosion resistance of 0.45% C superficial steel layers, a multilayer coating was tested by injection of powder with 88.3% Cu; 9.5% Al; 2.2% Fe in melted bath by CO2 continuous wave laser. Layers made by different laser conditions were characterized by macro and microstructure analysis, phase quality analysis, by X ray diffractometry and microhardness analysis. Research was carried out regarding the importance of nickel alloy intermediary layer for the rising of cladding quality. The Annals of "Dunarea de Jos" University of Galati Fascicle IX Metallurgy and Materials Science

2015-01-01T00:00:00Z Istrate, Gina Genoveva Radu, Tamara http://arthra.ugal.ro/handle/20.500.14043/25848 2020-09-03T13:27:50Z 2015-01-01T00:00:00Z

Corrosion Behavior of Ni-P Coated Steel Strips Istrate, Gina Genoveva; Radu, Tamara In addition to high hardness, Ni-P coatings obtained by the electroless method are widely used due to their high corrosion resistance. The corrosion resistance depends on the content of phosphorus in the coating. Various phosphorus contents result from changes in pH in the process of obtaining layers. The layers obtained in different working conditions were tested for electrochemical corrosion. Tests were conducted on a potentiostat PGP 201. There were plotted and analyzed the anodic polarization Tafel curves for different phosphorus contents, pH conditions and timeexposure in the coating bath. Analyzing the anodic polarization curves it is noticed that low phosphorus sample shows an almost continuous corrosion process while samples with high phosphorus content have slow corrosion in the 3.5% NaCl testing medium. The Annals of "Dunarea de Jos" University of Galati Fascicle IX Metallurgy and Materials Science No. 3 - 2015, ISSN 1453 – 083X

2015-01-01T00:00:00Z