SINTEF search

The application of plastic core solder balls (PCSB) for the assembly of a silicon (Si) interposer die inside a ceramic package has been evaluated for a harsh application. Three different variants of assembly were compared. All variants survived the performed thermal shock cycling and centrifugation...

The Cu-Y2O3 and CuCrZr-Y2O3 materials have been devised as thermal barriers in nuclear fusion reactors. It is expected that in the nuclear environments, the materials should be working on extreme conditions of irradiation. In this work the Cu-Y2O3 and CuCrZr-Y2O3 were prepared and then irradiated in...

The application of plastic core solder balls (PCSB) for the assembly of a silicon (Si) interposer die inside a ceramic package has been evaluated for a harsh application. Three different variants of assembly were compared. All variants survived the performed thermal shock cycling and centrifugation...

It is well known that multicomponent catalysts can improve catalytic performance, however their rational design and precise control of catalytic activities by varying the composition of the elements is challenging. Herein, we present a facile and scalable synthetic strategy for production of senary...

Hydrogenases are attractive biocatalysts for utilization in electrochemical devices as potential replacement for Pt in hydrogen evolving electrodes. In this work, we investigate the immobilization of ferredoxin tagged FeFe-hydrogenase (Fd-HydA1) on black TiO₂ nanotubes (bTNTs), with uniform nanotube...

Palladium membranes used for hydrogen separation seemingly develop cavities filled with hydrogen, i.e. hydrogen bubbles, along the grain boundaries. These bubbles may represent initial stages of pinhole formation that lead to unselective leakage and compromise the long-term stability of the...

The formation of coarse Fe and Mn containing intermetallic particles during the DC casting of Al-Mn-Ti-Fe-Si alloys is detrimental to the alloys' cracking susceptibility, formability and even final mechanical/corrosion properties. In this talk, SEM/TEM are employed to reveal the microstructural...

The mechanical reversibility of stress-induced martensitic transformations is critical for the functional durability of superelastic materials, particularly at small scale. This study investigates the impact of grain boundary (GB) compatibility on the mechanical reversibility of martensitic...

The present work proposes a new approach to the development of nanostructured ferromagnetic composites based on progressive oxidation of high entropy alloys. Sequential ‘subtraction’ of the metals with the lowest oxidation energy destabilizes the remaining solid solution and induces phase separation...

Black TiO₂ is a versatile material that finds many applications in the field of photocatalysis but also in energy storage devices, such as supercapacitors. In this work, a new method is developed for the synthesis of black TiO₂ in the form of nanotubes. Amorphous TiO₂ nanotubes (TNTs) are annealed...

Chemical reactions involving co-deposits in plasma facing components will occur under heat loads. Previous experiments in the Be-C-O system evidenced that compound formation may induce by itself the peel-off of deposits when C films are annealed in vacuum due to the simultaneous formation and mixing...

UMB4 (M = V, Cr, Fe, Co, Mo, W, Re, Os) materials prepared by arc-melting have UMB4 as the main phase, with (V, Cr, Fe, Co) crystallising in the YCrB4 structure type, while (Mo, W, Re, Os) adopt the ThMoB4-type. For M = V, Cr, Mo, W the magnetic susceptibility is low and only weakly temperature...

Equiatomic high entropy alloys (HEA) have attracted considerable interest due to their exceptional properties, which might be closely related to their extreme disorder induced by chemical complexity. We have sputtered thin films of CrFeCoNiCu onto insulating and optically transparent substrates in...

The ZnCr2O4/ZnO materials system has a wide range of potential applications, for example, as a photocatalytic material for waste-water treatment and gas sensing. In this study, probe-corrected high-resolution scanning transmission electron microscopy and geometric phase analysis were utilized to...

Oxide-containing films were made by reactively sputtering a high-entropy alloy target of CrFeCoNiCu. We report on a wide range of changes to the electrical properties made by different heat treatments in oxidizing and reducing atmospheres, respectively. We combine temperature-dependent Hall effect...

Fourteen alloys of the FeCoNiAlxMnx system were processed by laser metal deposition (LMD). The feedstock was a weighted and proportional blend of the containing elemental powders, targeting the nominal alloy compositions. Prior to processing, the composition and particle characteristics of the...