28 Result(s)
within
G. Palombarini
English
Surfaces and Interfaces, Thin Films
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Article
Formation and characterization of boride coatings thermochemically grown on the Fe64Ni36 alloy
Boride coatings were grown on Armco iron and Fe64Ni36 alloy at 850°C for 20 min and 1 h, using a high boron potential powder constituted by KBF4-activated amorphous boron. The coatings were characterized by X-ray...
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Article
Interfacial microstructure and properties of dissimilar steels joined by high energy beam melting processes
Junctions between austenitic and ferritic steels were produced using two different processes involving melting at the contact surfaces: electron beam cladding designed to improve the corrosion resistance of th...
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Article
Borosiliciding of Fe–Ni alloys and evaluation of their resistance to abrasive wear
X-ray diffraction analysis, Mössbauer measurements and metallographic observations were performed on borosilicide coatings grown at 850°C on Armco iron and the Fe64Ni36 binary alloy using a KBF4-activated powder ...
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Article
Protection against corrosion of iron alloys by aluminized coatings produced using two different processes
Aluminized coatings were produced on iron by means of two different processes: electron beam deposition under UHV of Al on iron samples previously covered with 57Fe films, and hot-dip** of iron samples in molte...
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Article
On the phenomena occurring at the interface between iron and iron–platinum thin films
FePt films were rf sputtered at room temperature and 550˚C on MgO monocrystalline substrates. Room temperature films were post-annealed at 550˚C. The high temperature growth induces a tetragonal distortion of ...
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Article
Phase composition and distribution of corrosion products grown on galvanised steel in contact with hot water
The composition of localised corrosion products formed on galvanised steel in contact with hot water was determined using X-ray diffraction, electron probe microanalysis, Raman and Mössbauer spectroscopies. Ir...
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Article
Phase Composition of Oxidised Layers Grown on Steel Exposed to Liquid Lead at 749 K
The corrosion resistance of AISI 316 LN stainless steel was studied in contact with stagnant, oxygen-saturated liquid lead at 749 K for times up to 1200 h. The reaction products were analysed by means of optic...
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Article
Influence of the Interfacial Characteristics on the Tribological Behaviour of TiN-Base Films on Iron
The dry sliding behaviour of TiN-base films deposited onto a tool steel by two different physical vapour deposition techniques is discussed on the basis of the characteristics of both coatings and interfacial ...
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Article
On the Phase Transformations in Cr–FeB and Fe–CrB Systems at High Temperature
The solid state interactions occurring at high temperature in the Cr–FeB and Fe–CrB systems were studied by transmission Mössbauer and X-ray diffraction techniques on samples prepared by powders carefully mixe...
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Article
Surface Treatment of Iron Alloys by Means of High Energy Beams
The improvements which can be obtained in the surface properties of iron alloys by means of processes involving high-energy beams (ion, electron, laser beams) are illustrated and discussed. The most important ...
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Chapter and Conference Paper
Influence of the Interfacial Characteristics on the Tribological Behaviour of TiN-Base Films on Iron
The dry sliding behaviour of TiN-base films deposited onto a tool steel by two different physical vapour deposition techniques is discussed on the basis of the characteristics of both coatings and interfacial ...
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Chapter and Conference Paper
On the Phase Transformations in Cr-FeB and Fe-CrB Systems at High Temperature
The solid state interactions occurring at high temperature in the Cr-FeB and Fe-CrB systems were studied by transmission Mössbauer and X-ray diffraction techniques on samples prepared by powders carefully mixe...
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Chapter and Conference Paper
Surface Treatment of Iron Alloys by Means of High Energy Beams
The improvements which can be obtained in the surface properties of iron alloys by means of processes involving high-energy beams (ion, electron, laser beams) are illustrated and discussed. The most important ...
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Article
Temperature dependence of microstructure of Fe62.5Co6Ni7.5Zr6Cu1Nb2B15 magnetic alloy
Strips of Fe62.5Co6Ni7.5Zr6Cu1Nb2B15, prepared by rapid quenching from the melt, were annealed at different temperatures and studied performing Mössbauer and magnetoelastic measurements. By increasing annealing t...
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Article
Improvement of Surface Properties of AISI 304 Stainless Steel by Laser Melting
The microstructures and properties of deep laser melted and rapidly solidified zones produced by a cw power laser on thick plates of AISI 304 stainless steel were studied. Both chemical and mechanical properti...
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Article
Materials and surface treatments for tribological applications
Understanding wear mechanisms and the consequent optimization of surface treatments require powerful and integrated techniques of surface diagnostics. It is shown that Mössbauer spectroscopy techniques can mak...
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Article
High temperature solid state reactivity between iron and chromium monoborides
Powder mixtures of FeB and CrB were compacted and then treated at 1000 \(^\circ \) C under vacuum for 8 h in order to...
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Article
Aging of Fe-Al thin film multilayers in an oxidizing environment in the 300–400 K range
Multilayers constituted by very thin films of Fe and Al were deposited by thermal evaporation and aged in air at temperatures in the 300–400 K range for times up to 200 h. Interdiffusion phenomena occurred dur...
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Article
Alloying of Fe-B compounds with Cr: Effects of Fe liberation and comparison with Ni alloying
Powder samples of pure Fe2B and FeB were mixed with different amounts of Cr powder and treated at 1000 °C for 200 h. Cr enters borides in substitution for Fe and liberates Fe. The effects of Fe liberation on phas...
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Article
Surface modifications for mechanical applications
Chemical and high energy beam conversion coatings, as well as PVD thin films, are characterised to correlate microstructures and mechanical properties. In particular, thermochemical boriding and laser surface ...
