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2. Površinska kemija naravnih oksidnih plasti na uporabljenih in novih vzorcih stegneničnih komponent endoproteze kolka iz Ti-6Al-7Nb zlitine : diplomsko deloMatic Petrič, 2023, diplomsko delo Ključne besede: kolčne endoproteze, aseptično omajanje, periprostetična okužba, titanov oksid, polimeri, titanove zlitine, XPS, SEM, EBSD, diplomsko delo
Objavljeno v DiRROS: 18.04.2025; Ogledov: 642; Prenosov: 267
 Celotno besedilo (3,11 MB) |
3. The impact of a thermal insulation layer on the seismic performance of energy-efficient buildingsStanislav Lenart, Siva Ram Karumanchi, 2024, objavljeni znanstveni prispevek na konferenci Povzetek: Energy-efficient homes are constructed with a continuous and uniform thermal envelope and are commonly built on top of a thermal insulation (TI) layer that encloses the entire building. Lightweight aggregates such as foamed glass aggregate, expanded clay aggregate, and extruded polystyrene (XPS) insulation boards are commonly used as materials for the TI layer to prevent thermal bridging at the ground floor slab. However, the reinforced concrete slab foundation above the TI layer is susceptible to horizontal sliding during seismic loading. To improve the seismic behavior of buildings founded on TI layers, this study discussed the shear stiffness and damping characteristics of lightweight aggregates and three types of XPS boards through laboratory tests available in the literature. A 2-dimensional numerical analysis is performed, and the corresponding validation results of the simulations are presented. The effect of TI layers on the seismic performance of buildings constructed with TI layers made from these materials is assessed. A comparative analysis of various interface conditions of the TI materials under seismic loading is also conducted. Overall, this research aims to enhance the resilience and sustainability of energy-efficient homes by investigating the impact of TI layers on their seismic performance. The findings provide valuable insights for designing more robust structures that can withstand seismic events.
Ključne besede: energy-efficient buildings, thermal insulation, extruded polystyrene (XPS), finite element analysis, foamed glass aggregate, seismic response
Objavljeno v DiRROS: 21.01.2025; Ogledov: 824; Prenosov: 472
Celotno besedilo (854,84 KB)
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4. Influence of laser colour marking on the corrosion properties of low alloyed TiTadeja Kosec, Andraž Legat, Janez Kovač, Damjan Klobčar, 2019, izvirni znanstveni članek Povzetek: In the field of surface treatment, laser colour marking can be used to produce coloured marks on the surfaces of metals. Laser colour markings can be applied to various materials, but on titanium alloys a wide spectra of vivid colours can be achieved. This study presents an analysis of the corrosion properties of laser treated surfaces that were exposed to aggressive environments. Different samples were prepared with laser light of various power intensities and processing speeds. The samples were prepared on low alloyed Ti. Electrochemical, spectroscopic and microstructural analyses were conducted in order to study the properties of the laser treated surfaces. Corrosion testing showed different effects of laser power and production speed on the properties of the laser treated surfaces. It was shown that a high intensity and slow processing rate affect the surfaces by forming oxides that are relatively stable in a corrosive environment of 0.1 M NaCl. Spectroscopic investigations including scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) analyses showed the differences in chemical structure of the surface layer formed after laser treatment. Similarly, microstructural investigations showed different effects on the surface and sub-surface layer of the laser treated samples.
Ključne besede: Ti alloy, laser treatment, XPS, corrosion
Objavljeno v DiRROS: 25.10.2023; Ogledov: 1554; Prenosov: 795
Celotno besedilo (3,16 MB)
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5. The influence of catechols on the magnetization of iron oxide nanoparticlesStanislav Čampelj, Matic Pobrežnik, Tomas Landovsky, Janez Kovač, Layla Martin-Samos, Věra Hamplová, Darja Lisjak, 2023, izvirni znanstveni članek Ključne besede: magnetni nanodelci, kateholi, adsorpcija, magnetne lastnosti, XPS, DFT
Objavljeno v DiRROS: 12.06.2023; Ogledov: 1797; Prenosov: 1013
Celotno besedilo (7,50 MB)
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6. Corrosion characterization and ion release in SLM-manufactured and wrought Ti6Al4V alloy in an oral environmentMirjam Bajt Leban, Tadeja Kosec, Matjaž Finšgar, 2022, izvirni znanstveni članek Povzetek: As-produced and heat-treated TiAlV samples were prepared by selective laser melting and compared to wrought samples of identical chemical composition. Microstructural, corrosion, and spectroscopic studies of additively manufactured samples in artificial saliva at 37 °C, with NaF and at pH 2.3 were as a novelty combined with metal ion release during 42 days immersion. In artificial saliva higher amount of ions was released on SLM specimen when compared to wrought alloy. The total amount of ions released from SLM specimen in AS containing NaF was 10-times higher than in AS, while in AS with lactic acid it was 100-times higher.
Ključne besede: Ti6Al4V, SLM, corrosion, ion release, XPS, ToF-SIMS
Objavljeno v DiRROS: 31.05.2023; Ogledov: 1425; Prenosov: 1479
Celotno besedilo (15,86 MB)
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7. Effects of Zr doping into ceria for the dry reforming of methane over ▫$Ni/CeZrO_2$▫ catalysts ein situ studies with XRD, XAFS, and AP-XPS : in situ studies with XRD, XAFS, and AP-XPSFeng Zhang, Zenghui Liu, Xiaobo Chen, Ning Rui, Luis E. Betancourt, Lili Lin, Wenqian Xu, Cheng-jun Sun, A. M. Milinda Abeykoon, José A. Rodriguez, Janvit Teržan, Kristijan Lorber, Petar Djinović, Sanjaya D. Senanayake, 2020, izvirni znanstveni članek Ključne besede: nickel, ceria, zirconia, ▫$CeZrO_2$▫ solid solution, XRD, XAFS, AP-XPS, dry reforming of methane
Objavljeno v DiRROS: 13.03.2023; Ogledov: 1759; Prenosov: 1329
Celotno besedilo (1,75 MB)
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8. Influence of drying temperature on properties of wood surfacesMilan Šernek, 2002, izvirni znanstveni članek Povzetek: This article deals with modifications of wood surface properties induced by different drying temperatures. The aim of the study was chemical and physical characterization of a wood surface concerning low and high temperature exposure. Additionally, the correlation between the chemical composition of a wood surface and its wetting capacity were investigated. X-ray photoelectron spectroscopy and contact angle measurements were conducted. Two wood species, yellow poplar (Liriodendron tulipifera) and southern pine (Pinus taeda) were studied. The results showed that the percentage of carbon increased with drying temperature, and consequently, the percentage of oxygen decreased. The samples exposed to high drying temperatures indicated a higher content of extractives on the wood surface. These samples exhibited the highest contact angle and the lowest wettability
Ključne besede: površina lesa, sušenje, kontaktni kot, rentgenska fotoelektronska spektroskopija, omočitev, ekstraktivne snovi, wood surface, drying, contact angle, XPS, wettability, extractives
Objavljeno v DiRROS: 12.07.2017; Ogledov: 5952; Prenosov: 2446
Celotno besedilo (932,44 KB) |
