1. Corrosion of sintered NdFeB permanent magnetsTerezija Poženel Kovačič, Nataša Kovačević, Ingrid Milošev, 2025, pregledni znanstveni članek Povzetek: The green transition to reduce reliance on fossil fuel energy sources and minimise global warming is accelerating the need for NdFeB permanent magnet materials. Sintered NdFeB magnets cover the largest segment percentage within the permanent magnet type group, with a share of over 50%. The microstructure of NdFeB magnets includes grains of the Nd1+εFe4B4 (B-rich phase), which form grain boundaries with both the Nd-rich (Nd4Fe) and matrix (Nd2Fe14B) phases. NdFeB magnets are prone to degradation in harsh environments due to the low corrosion resistance of both iron and neodymium. Consequently, magnets require corrosion protection because their magnetic properties would be jeopardised due to the degradation caused by the corrosion process. Understanding magnets’ electrochemical and corrosion properties is crucial for developing their corrosion protection and thus prolonging their smooth operation in numerous industrial applications. This review aims to present the fundamental corrosion processes on sintered NdFeB magnets, provide an overview of the contemporary magnet production processes of NdFeB magnets and their impact on the corrosion resistance, and summarise the corrosion protection of NdFeB magnets. Prospects are presented, especially regarding the use of magnets in the transportation (hybrid and electric vehicles) industry and the development of alternative types of coatings.
Ključne besede: sintered magnets, green transition
Objavljeno v DiRROS: 03.07.2025; Ogledov: 161; Prenosov: 62
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2. Zr and Zr-Cr commercial conversion coatings deposited on 3003 aluminium alloy foilMaja Mujdrica Kim, Barbara Kapun, Ingrid Milošev, 2025, izvirni znanstveni članek Povzetek: MAVOMcoat MC1300 (Zr-Cr-based coating) and MC1700 (Zr-based coating) on chemically pre-treated aluminium alloy 3003. Conversion times varied from 80 s to 45 min. After deposition, the samples were subjected to three post-treatments: air drying for 15 min, air drying for 24 h, and immersion in 3.5 wt% NaCl solution for 24 h. Corrosion resistance was evaluated using electrochemical measurements, whereas scanning electron microscopy with energy dispersive spectroscopy and X-ray photoelec tron spectroscopy were employed for surface analysis. Based on the evaluation of corrosion parameters, the optimal conversion times for MC1700 and MC1300 were determined to be 10 min and 7 min, respectively. The conversion coatings MC1700 and MC1300 were characterised by distinct elemental compositions, with the former predominantly comprising Zr, O, Al and F, and the latter Zr, O, Al, Cr and F. Notably, the thickness of coatings was between 10 and 170 nm, depending on the type of coating and location (matrix or intermetallic particles). The 24-hour immersion of MC1700 ZrCC in 3.5 wt% NaCl led to progressive build-up of Zr oxide and release of fluoride from the coating.
Objavljeno v DiRROS: 10.06.2025; Ogledov: 194; Prenosov: 57
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3. Composition, microstructure and corrosion resistance of DED-LB additively manufactured Ti–6Al–4V alloy : comparison with wrought alloyIngrid Milošev, Peter Rodič, Barbara Kapun, Denis Sačer, Anish Nair, Davorin Kramar, Andrej Jeromen, Edvard Govekar, 2025, izvirni znanstveni članek Ključne besede: titanium alloys, directed-energy deposition by laser beam, simulated physiological solution
Objavljeno v DiRROS: 03.06.2025; Ogledov: 214; Prenosov: 98
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4. Titanium nanostructures for biomedical applicationsMukta Vishwanath Kulkarni, Anca Mazare, Ekaterina Gongadze, Šárka Perutková, Veronika Kralj-Iglič, Ingrid Milošev, Patrik Schmuki, Aleš Iglič, Miran Mozetič, 2015, pregledni znanstveni članek Objavljeno v DiRROS: 20.05.2025; Ogledov: 173; Prenosov: 58
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5. The effect of cerium ions on the structure, porosity and electrochemical properties of Si/Zr-based hybrid sol-gel coatings deposited on aluminumPeter Rodič, Jozefina Katić, Dorota Korte, Paula M. Desimone, Mladen Franko, Silvia Ceré, Mirjana Metikoš-Huković, Ingrid Milošev, 2018, izvirni znanstveni članek Objavljeno v DiRROS: 20.05.2025; Ogledov: 171; Prenosov: 62
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7. Risk of cancer after primary total hip replacement : the influence of bearings, cementation and the material of the stemVesna Levašič, Ingrid Milošev, Vesna Zadnik, 2018, izvirni znanstveni članek Povzetek: Background and purpose - Despite the increasing number of total hip replacements (THRs), their systemic influence is still not known. We have studied the influence of specific features of THRs-the bearing surface, the use of bone cement and the material of the stem-on the cancer incidence. Patients and methods - In a retrospective cohort study we identified 8,343 patients with THRs performed at Valdoltra Hospital from September 1, 1997 to December 31, 2009. Patient data were linked to national cancer and population registries. The standardized incidence ratios (SIR) and Poisson regression relative risks (RR) were calculated for all and specific cancers. Results - General cancer risk in our cohort was comparable to the population risk. Comparing with population, the risk of prostate cancer was statistically significantly higher in patients with metal-on-metal bearings (SIR =1.35); with metal-on-polyethylene bearings (SIR =1.30), with non-cemented THRs (SIR =1.40), and with titanium alloy THRs (SIR =1.41). In these last 3 groups there was a lower risk of hematopoietic tumors (SIR =0.69; 0.66 and 0.66 respectively). Risk of kidney cancer was significantly higher in the non-metal-on-metal, non-cemented, and titanium alloy groups (SIR =1.30; 1.46 and 1.41 respectively). Risk of colorectal and lung cancer was significantly lower in the investigated cohort (SIR =0.82 and 0.83, respectively). Risk for all cancers combined as well as for prostate and skin cancer, shown by Poisson analysis, was higher in the metal-on-metal group compared with non-metal-on-metal group (RR =1.56; 2.02 and 1.92, respectively). Interpretation - Some associations were found between the THRs' features, especially a positive association between metal-on-metal bearings, and specific cancers.
Ključne besede: oncology, cancer registry, replacements, materials
Objavljeno v DiRROS: 19.05.2025; Ogledov: 228; Prenosov: 108
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