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Papers by H. Ardelean

Research paper thumbnail of A first quantitative XPS study of the surface films formed, by exposure to water, on Mg and on the Mg–Al intermetallics: Al3Mg2 and Mg17Al12

Research paper thumbnail of Corrosion protection of AZ91 magnesium alloy by anodizing in niobium and zirconium-containing electrolytes

Research paper thumbnail of Adhesion properties of aluminium-metallized/ammonia plasma-treated polypropylene

Applied Surface Science, 2002

Research paper thumbnail of A first quantitative XPS study of the surface films formed, by exposure to water, on Mg and on the Mg–Al intermetallics: Al3Mg2 and Mg17Al12

Research paper thumbnail of Effects of different laser and plasma treatments on the interface and adherence between evaporated aluminium and polyethylene terephthalate films: X-ray photoemission, and adhesion studies

Applied Surface Science, 2005

ABSTRACT Chemical functionalities, topography and adherence between Al and polyethylene terephtha... more ABSTRACT Chemical functionalities, topography and adherence between Al and polyethylene terephthalate (PET) films, modified by laser treatment below the polymer ablation threshold fluence in air and in helium at different wavelengths, fluences, pulse numbers and by low pressure plasma treatment in He 95% with O2 5%, at 0.2W/cm3 were investigated by XPS, AFM, water contact angle and adhesion measurements. XPS results revealed (i) formation of polar-oxygenated functional groups (CO, OCO) by laser treatments in air and (ii) incorporation of ester and ether groups by plasma treatment in He 95% with O2 5%. After deposition of thermally evaporated Al on laser or plasma treated PET films, U-Peel tests indicated that laser treatment in air at 248nm and 20mJ/cm2, and plasma treatment improved Al/PET adhesion. XPS studies revealed the presence of an increasing number of AlOC stable and cohesive interfacial complexes formed by chemical interaction between aluminium and the laser treated in air or plasma treated in He 95% with O2 5% PET films. These interfacial compounds play an important role in the enhancement of the metal/polymer adhesion.

Research paper thumbnail of Canava et al 1997 Surface Modification of Cu(In,Ga)Se2 Thin Films During Aqueous Oxidation Etch

Research paper thumbnail of Surface Modification of Cu(In,Ga)Se2 Thin Films During Aqueous Oxidation Etch

Research paper thumbnail of Magnesium Technology 2013 A

Research paper thumbnail of Study of cerium species in molten Li2CO3–Na2CO3 in the conditions used in molten carbonate fuel cells. Part I: Thermodynamic, chemical and surface properties

Research paper thumbnail of Fuel Cells Solution for Auxiliary Services Backup Supply in a Power System Substation

EUROCON 2007 - The International Conference on "Computer as a Tool", 2007

Abstract This paper presents some considerations about fuel cell energy utilization instead of cl... more Abstract This paper presents some considerations about fuel cell energy utilization instead of classical backup sources for substation ancillary services. The main necessity of substation ancillary services is to stay supplied and one modern solution to supply the ...

Research paper thumbnail of Analysis of contingencies considering the new 400 kV axle administrated by Timisoara transmission branch

2008 Conference on Human System Interactions, 2008

... 400 kV buses were being introduced to Resita, Timisoara and Sacalaz; 2) The 400 kV electrical... more ... 400 kV buses were being introduced to Resita, Timisoara and Sacalaz; 2) The 400 kV electrical line Porile de Fier - Anina - Reúia was ... according to the aims of the project), the real generators being introduced to medium voltage, together with the afferent block transformers . ...

Research paper thumbnail of Corrosion protection of magnesium alloys by cerium, zirconium and niobium-based conversion coatings

Research paper thumbnail of A first quantitative XPS study of the surface films formed, by exposure to water, on Mg and on the Mg–Al intermetallics: Al3Mg2 and Mg17Al12

Research paper thumbnail of Corrosion protection of AZ91 magnesium alloy by anodizing in niobium and zirconium-containing electrolytes

Research paper thumbnail of DEVELOPMENT OF NEW GREEN PROTECTION WITH CERIUM, ZIRCONIUM AND NIOBIUM COMPOUNDS FOR Mg-Y-RE-Zr ALLOYS

Research paper thumbnail of Electrochemical reactivity, surface composition and corrosion mechanisms of the complex metallic alloy Al3Mg2

Research paper thumbnail of A Preliminary Quantitative XPS Study of the Surface Films Formed on Pure Magnesium and on Magnesium-Aluminium Intermetallics by Exposure to High-Purity Water

Materials Science Forum, 2009

Research paper thumbnail of Enhanced corrosion resistance of magnesium and its alloys through the formation of cerium (and aluminium) oxide surface films

Materials and Corrosion, 2001

Research paper thumbnail of Adhesion properties of aluminium-metallized/ammonia plasma-treated polypropylene

Applied Surface Science, 2002

Research paper thumbnail of Effects of different laser and plasma treatments on the interface and adherence between evaporated aluminium and polyethylene terephthalate films: X-ray photoemission, and adhesion studies

Applied Surface Science, 2005

ABSTRACT Chemical functionalities, topography and adherence between Al and polyethylene terephtha... more ABSTRACT Chemical functionalities, topography and adherence between Al and polyethylene terephthalate (PET) films, modified by laser treatment below the polymer ablation threshold fluence in air and in helium at different wavelengths, fluences, pulse numbers and by low pressure plasma treatment in He 95% with O2 5%, at 0.2W/cm3 were investigated by XPS, AFM, water contact angle and adhesion measurements. XPS results revealed (i) formation of polar-oxygenated functional groups (CO, OCO) by laser treatments in air and (ii) incorporation of ester and ether groups by plasma treatment in He 95% with O2 5%. After deposition of thermally evaporated Al on laser or plasma treated PET films, U-Peel tests indicated that laser treatment in air at 248nm and 20mJ/cm2, and plasma treatment improved Al/PET adhesion. XPS studies revealed the presence of an increasing number of AlOC stable and cohesive interfacial complexes formed by chemical interaction between aluminium and the laser treated in air or plasma treated in He 95% with O2 5% PET films. These interfacial compounds play an important role in the enhancement of the metal/polymer adhesion.

Research paper thumbnail of A first quantitative XPS study of the surface films formed, by exposure to water, on Mg and on the Mg–Al intermetallics: Al3Mg2 and Mg17Al12

Research paper thumbnail of Corrosion protection of AZ91 magnesium alloy by anodizing in niobium and zirconium-containing electrolytes

Research paper thumbnail of Adhesion properties of aluminium-metallized/ammonia plasma-treated polypropylene

Applied Surface Science, 2002

Research paper thumbnail of A first quantitative XPS study of the surface films formed, by exposure to water, on Mg and on the Mg–Al intermetallics: Al3Mg2 and Mg17Al12

Research paper thumbnail of Effects of different laser and plasma treatments on the interface and adherence between evaporated aluminium and polyethylene terephthalate films: X-ray photoemission, and adhesion studies

Applied Surface Science, 2005

ABSTRACT Chemical functionalities, topography and adherence between Al and polyethylene terephtha... more ABSTRACT Chemical functionalities, topography and adherence between Al and polyethylene terephthalate (PET) films, modified by laser treatment below the polymer ablation threshold fluence in air and in helium at different wavelengths, fluences, pulse numbers and by low pressure plasma treatment in He 95% with O2 5%, at 0.2W/cm3 were investigated by XPS, AFM, water contact angle and adhesion measurements. XPS results revealed (i) formation of polar-oxygenated functional groups (CO, OCO) by laser treatments in air and (ii) incorporation of ester and ether groups by plasma treatment in He 95% with O2 5%. After deposition of thermally evaporated Al on laser or plasma treated PET films, U-Peel tests indicated that laser treatment in air at 248nm and 20mJ/cm2, and plasma treatment improved Al/PET adhesion. XPS studies revealed the presence of an increasing number of AlOC stable and cohesive interfacial complexes formed by chemical interaction between aluminium and the laser treated in air or plasma treated in He 95% with O2 5% PET films. These interfacial compounds play an important role in the enhancement of the metal/polymer adhesion.

Research paper thumbnail of Canava et al 1997 Surface Modification of Cu(In,Ga)Se2 Thin Films During Aqueous Oxidation Etch

Research paper thumbnail of Surface Modification of Cu(In,Ga)Se2 Thin Films During Aqueous Oxidation Etch

Research paper thumbnail of Magnesium Technology 2013 A

Research paper thumbnail of Study of cerium species in molten Li2CO3–Na2CO3 in the conditions used in molten carbonate fuel cells. Part I: Thermodynamic, chemical and surface properties

Research paper thumbnail of Fuel Cells Solution for Auxiliary Services Backup Supply in a Power System Substation

EUROCON 2007 - The International Conference on "Computer as a Tool", 2007

Abstract This paper presents some considerations about fuel cell energy utilization instead of cl... more Abstract This paper presents some considerations about fuel cell energy utilization instead of classical backup sources for substation ancillary services. The main necessity of substation ancillary services is to stay supplied and one modern solution to supply the ...

Research paper thumbnail of Analysis of contingencies considering the new 400 kV axle administrated by Timisoara transmission branch

2008 Conference on Human System Interactions, 2008

... 400 kV buses were being introduced to Resita, Timisoara and Sacalaz; 2) The 400 kV electrical... more ... 400 kV buses were being introduced to Resita, Timisoara and Sacalaz; 2) The 400 kV electrical line Porile de Fier - Anina - Reúia was ... according to the aims of the project), the real generators being introduced to medium voltage, together with the afferent block transformers . ...

Research paper thumbnail of Corrosion protection of magnesium alloys by cerium, zirconium and niobium-based conversion coatings

Research paper thumbnail of A first quantitative XPS study of the surface films formed, by exposure to water, on Mg and on the Mg–Al intermetallics: Al3Mg2 and Mg17Al12

Research paper thumbnail of Corrosion protection of AZ91 magnesium alloy by anodizing in niobium and zirconium-containing electrolytes

Research paper thumbnail of DEVELOPMENT OF NEW GREEN PROTECTION WITH CERIUM, ZIRCONIUM AND NIOBIUM COMPOUNDS FOR Mg-Y-RE-Zr ALLOYS

Research paper thumbnail of Electrochemical reactivity, surface composition and corrosion mechanisms of the complex metallic alloy Al3Mg2

Research paper thumbnail of A Preliminary Quantitative XPS Study of the Surface Films Formed on Pure Magnesium and on Magnesium-Aluminium Intermetallics by Exposure to High-Purity Water

Materials Science Forum, 2009

Research paper thumbnail of Enhanced corrosion resistance of magnesium and its alloys through the formation of cerium (and aluminium) oxide surface films

Materials and Corrosion, 2001

Research paper thumbnail of Adhesion properties of aluminium-metallized/ammonia plasma-treated polypropylene

Applied Surface Science, 2002

Research paper thumbnail of Effects of different laser and plasma treatments on the interface and adherence between evaporated aluminium and polyethylene terephthalate films: X-ray photoemission, and adhesion studies

Applied Surface Science, 2005

ABSTRACT Chemical functionalities, topography and adherence between Al and polyethylene terephtha... more ABSTRACT Chemical functionalities, topography and adherence between Al and polyethylene terephthalate (PET) films, modified by laser treatment below the polymer ablation threshold fluence in air and in helium at different wavelengths, fluences, pulse numbers and by low pressure plasma treatment in He 95% with O2 5%, at 0.2W/cm3 were investigated by XPS, AFM, water contact angle and adhesion measurements. XPS results revealed (i) formation of polar-oxygenated functional groups (CO, OCO) by laser treatments in air and (ii) incorporation of ester and ether groups by plasma treatment in He 95% with O2 5%. After deposition of thermally evaporated Al on laser or plasma treated PET films, U-Peel tests indicated that laser treatment in air at 248nm and 20mJ/cm2, and plasma treatment improved Al/PET adhesion. XPS studies revealed the presence of an increasing number of AlOC stable and cohesive interfacial complexes formed by chemical interaction between aluminium and the laser treated in air or plasma treated in He 95% with O2 5% PET films. These interfacial compounds play an important role in the enhancement of the metal/polymer adhesion.

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