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1.

001-es BibID:BIBFORM009552
Első szerző:Fazekas Lajos (gépészmérnök)
Cím:Metalspraying a break shaft, testing the sprayed layers / Lajos Fazekas, Zsolt Tiba, András Molnár
Dátum:2009
Megjegyzések:Annually, huge amount of money is spent on repairing costs, which could be significantly reduced by utilizing and steadily developing the correctly chosen technologies. The rate of abrasion highly depends on the physical and chemical features of the surface layers. Considering that the price of the special materials acceptable for the abrasion requirements is too high, it is not expedient to produce the whole component from this material. In order to enhance the economic efficiency, thermal spraying process is utilized, which is appropriate to apply different metallic and nonmetallic materials on the surface. In this paper we present the renewal of a break shaft and the mechanical parameters of the sprayed layer.
Tárgyszavak:Műszaki tudományok Gépészeti tudományok előadáskivonat
metal spraying
sprayed layers
determining normal interlaminar strenght
determining shearing interlaminar strenght
Megjelenés:15th "Building Services, Mechanical and Building Industry Days" : International Conference : Debrecen, ... 15-16 October 2009 / szerk. Kalmár Ferenc, Kocsis Imre, Csomós György, Csáki Imre. - p. 47-54. -
További szerzők:Molnár András (mérnök) Tiba Zsolt (1965-) (gépészmérnök)
Internet cím:elektronikus változat
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2.

001-es BibID:BIBFORM023199
Első szerző:Molnár András (mérnök)
Cím:Quality improvement of flame and laser remelted NiCrBSi coatings [elektronikus dokumentum] / András Molnár, Gábor Búza, Zsolt Tiba, Lajos Fazekas
Dátum:2011
Megjegyzések:A szerzők által megadott adatok automatikusan feltöltve
In this study, properties of NiCrBSi coatings, produced by a two-step process of flame depositionand laser posttreatment, are analyzed. Adhesion strength, microstructure, porosity, microhardnessand chemical composition were analyzed after deposition and after laser remelting.Numerous specimens were made to study adhesion strength of coatings after flame deposition. Thefour chosen influential factors, that is, surface roughness, preheat temperature of the substrate,distance of flame torch, and type of oxyacetylene flame, were optimized to maximize the adhesionstrength.The confirmation experiment showed that the developed experimental model is suitable foroptimization of flame spraying deposition process. Based on the evaluation of coating properties,the best overall quality was obtained after remelting.
ISBN:978 963 473 464 2
Tárgyszavak:Műszaki tudományok Gépészeti tudományok tanulmány, értekezés
Megjelenés:XVII. Épületgépészeti, Gépészeti és Építőipari Szakmai Napok : szakkiállítás és Nemzetközi Tudományos Konferencia 2011. október 13-14. [elektronikus dokumentum] / szerk. Kalmár Ferenc, Balla Tibor ; [közread. a] Debreceni Egyetem Műszaki Kar. - p. 1-9. -
További szerzők:Búza Gábor Fazekas Lajos (1950-) (gépészmérnök) Tiba Zsolt (1965-) (gépészmérnök)
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
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3.

001-es BibID:BIBFORM012313
Első szerző:Molnár András (mérnök)
Cím:Cold - Gas Dynamic Spray technology and applications / András Molnár, Lajos Fazekas, Zsolt Tiba
Dátum:2010
Megjegyzések:Cold-Gas Dynamic Spray (or simply Cold Spray) is a novel process where a jet stream of small powder particles (1 - 50 ?m) is accelerated to supersonic speeds (300 - 1200 m/s) by a compressed and heated (0-700 oF) gas towards a substrate, and a strong metallurgical bond is formed between the particles and the substrate. This process is based on the selection of the combination of particle temperature, velocity, and size that allows spraying at the lowest temperature possible. In the Cold Spray process, powder particles are accelerated by the supersonic gas jet at a temperature that is always lower than the melting point of the material, resulting in coating formation from particles in the solid state. As a consequence, the deleterious effects of hightemperature oxidation, evaporation, melting, crystallization, residual stresses, gas release, and other common problems for traditional thermal spray methods are minimized or eliminated. However, being a relatively new technique, the bonding mechanism between particles and substrate is not well understood. In this study, the interface between Cu particles that were Cold Sprayed and an Al substrate is investigated, using an Optical Microscope, a Scanning Electron Microscope (SEM).
Tárgyszavak:Műszaki tudományok Gépészeti tudományok előadáskivonat
cold spraying
metallurgical bond
coating formation
Megjelenés:16th "Building Services, Mechanical and Building Industry Days" International Conference : 14-15 October 2010 Debrecen, Hungary / [szerk....Kalmár Ferenc, ... Csomós György, Csáki Imre]. - p. 37-47. -
További szerzők:Fazekas Lajos (1950-) (gépészmérnök) Tiba Zsolt (1965-) (gépészmérnök)
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
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4.

001-es BibID:BIBFORM009457
Első szerző:Molnár András (mérnök)
Cím:The effects of the technological parameters on the interlaminar strenght of the Ni-based spray welded layers / Molnár András, Fazekas Lajos, Tiba Zsolt
Dátum:2009
Megjegyzések:A very important job of our days is the material- and energy saving. Keeping this in view, the application of Ni-based layers with a mechanical resistance, has an important role in increasing the life of the parts and means of production. The sprayed and sintered coating - which is created by means of matching of the basic material, added material and technology, will protect and make resistant the bearing area of the given part or means of production. During the practical realisation of the spray welding the powder alloy will be added to the conveying and heating medium, which, depending on the procedure, is oxygen-acetylene, or its flame, plasma arc, or plasma jet. Nowadays, i.e. in the case of the hypersonic spraying, a heat energy is applied which has been got by the incineration of gases containing greater carbon atoms.
Tárgyszavak:Műszaki tudományok Gépészeti tudományok előadáskivonat
layer
specimen
bond strenght
thermal spraying
spray welding thermal spraying
sprayed layers
determining normal interlaminar strenght
bond strength
Megjelenés:15th "Building Services, Mechanical and Building Industry Days" : International Conference : Debrecen, ... 15-16 October 2009 / szerk. Kalmár Ferenc, Kocsis Imre, Csomós György, Csáki Imre. - p. 93-100. -
További szerzők:Fazekas Lajos (1950-) (gépészmérnök) Tiba Zsolt (1965-) (gépészmérnök)
Internet cím:elektronikus változat
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5.

001-es BibID:BIBFORM039848
Első szerző:Tiba Zsolt (gépészmérnök)
Cím:Plasma sprayed thermal barrier coatings applied on gas turbine engine parts [elektronikus dokumentum] / Tiba Zsolt, Fazekas Lajos, Temesi Attila, Molnár András
Dátum:2012
Megjegyzések:A szerzők által megadott adatok automatikusan feltöltve
Thermal barrier coatings (TBCs) are usually applied on high temperature gas turbine components. A thermal barrier coating (TBC) is a multilayer material, ceramic and metal, whose primary job is to sustain a temperature gradient between the environment and an underlying component. TBCs are most often employed in jet engines and industrial gas turbines where they protect metal components from the hot gas stream in the high temperature sections of the engine. Depending on the application of plasma spray coating, different characteristics are important but there are some characteristics that are the same for all plasma spray applications: thickness, porosity, microstructure, presence of unmelted particles, cracks and oxides, microhardness and bond strength.
ISBN:978-963-473-591-5
Tárgyszavak:Műszaki tudományok Gépészeti tudományok könyvfejezet
Microstructure
Ni-base alloys
Thermal barrier
Bond coat
Top coat
Megjelenés:Proceedings of 18th Building Services, Mechanical and Building Industry days, International Conference [elektronikus dokumentum] : [11-12 October 2012, Debrecen, Hungary] / ed. Ferenc Kalmár [et al.]. - p. 1-10. [Paper Code: MAS 12-06]. -
További szerzők:Temesi Attila Molnár András (mérnök) Fazekas Lajos (1950-) (gépészmérnök)
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
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