Blar i Institutt for materialteknologi på utgivelsesdato
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Piezoresponse force microscopy and nanoferroic phenomena
(Journal article; Peer reviewed, 2019)Since its inception more than 25 years ago, Piezoresponse Force Microscopy (PFM) has become one of the mainstream techniques in the field of nanoferroic materials. This review describes the evolution of PFM from an imaging ... -
Interaction of SiO-gas and Charcoal and the Formation of SiC and Si
(Master thesis, 2019)For å nå eit høgt utbytte i produksjonen av silisium, er det viktig å fange stigande SiO-gass ved reaksjon med karbonhaldig materialar for å danne SiC. Den påfølgjande reaksjonen mellom SiC og SiO-gass er kjend for å ... -
Effect of Ag addition on the precipitation evolution and interfacial segregation for Al?Mg?Si alloy
(Journal article; Peer reviewed, 2019)The effect of Ag addition on the precipitation evolution and interfacial segregation for Al–Mg–Si alloys was systematically investigated by atomic resolution high-angle annular dark-field scanning transmission electron ... -
Cryogenic vs. absorption biogas upgrading in liquefied biomethane production – An energy efficiency analysis
(Journal article; Peer reviewed, 2019)Production of liquefied biomethane (LBM) from biogas comprises two major energy intensive processes; upgrading to increase the methane concentration and refrigeration to liquefy the upgraded biogas. Amine-based absorption ... -
Studies of Zr-based C15 type metal hydride battery anode alloys prepared by rapid solidification
(Journal article; Peer reviewed, 2019)The objective of the present work was to study an interrelation between the conditions of the rapid solidification casting and electrochemical properties of a C15 Laves-type Zr-based metal hydride battery anode alloy. A ... -
Strength and Ductility in two Ultra High Strength Al-Alloys AA2196 and AA7090
(Master thesis, 2019)I denne masteroppgaven blir de mekaniske egenskapene, kornstrukturen og anisotropien i tredjegenerasjons Al-Li legeringen AA2196 undersøkt etter en foreslått varmebehandlingsprosess. Hensikten med rapporten er å undersøke ... -
Effekten av karbonbelegg på tinnbelagte og varmepressede bipolare plater for PEM-brenselceller
(Bachelor thesis, 2019)Formålet med arbeidet har vært å utvikle et nytt, lavkost og varig overflatebelegg for bipolare plater av rustfritt stål til PEM-brenselceller. Hensikten med arbeidet var å oppnå økt stabilitet av tinnbelegg og minke ... -
Cu Interlayer-Induced High-Strength Laser-Welded AISI 304 Steel-Niobium Joint
(Peer reviewed; Journal article, 2019)Joining niobium to austenitic stainless steel is necessary for the fabrication of particle accelerators. However, the brittle iron-niobium intermetallics formed in the joint significantly reduce the joint strength. Copper ... -
The influence of silicon in EN AW 6082 alloys on the bond strength in cold pressure welding
(Journal article; Peer reviewed, 2019)Metallurgical joining of steel and aluminum has become a field of interest in research in the last years, as it will allow the production of load adapted lightweight components in the future. The production process of cold ... -
Karakterisering av mikrostruktur og mekaniske egenskaper til selektiv lasersmeltet AlSi10Mg og AlSi7MgCuHf, direkte på en AlSi7MgCu støpelegering
(Master thesis, 2019)Selektiv lasersmelting (SLS) er en av flere metoder under additiv tilvirkning. Produktet bygges ved at en laser smelter pulverpartikler sammen lag for lag. Til forskjell fra de konvensjonelle metodene som støping, ekstrudering ... -
The Effect of Elastic Strain and Small Plastic Deformation on Tensile Strength of a Lean Al–Mg–Si Alloy
(Journal article; Peer reviewed, 2019)Al–Mg–Si alloys are usually formed into their final shape by rolling or extrusion. After extrusion, the aluminium profiles are usually straightened, causing the material to be subjected to a small plastic deformation. This ... -
Calcareous smectite clay as a pozzolanic alternative to kaolin
(Journal article; Peer reviewed, 2019)The hydration of cement pastes with addition of a kaolinite rich clay (Clay A) and a calcareous smectite rich clay (Clay B) was investigated with isothermal calorimetry, in-situ XRD, PXRD, TGA and EPMA. Portland cement was ... -
Carbon cathode wear in aluminium electrolysis cells
(Journal article; Peer reviewed, 2019)Autopsies of six spent potlinings with different carbon cathode block grades, amperage regimes and cell technologies were conducted at three separate smelters to reveal possible mechanisms causing cathode wear. Microstructure ... -
Processing of high performing composite cathodes for protonic ceramic fuel cells by exsolution
(Journal article; Peer reviewed, 2019)La0.5Ba0.5CoO3-δ-BaZrO3 (LB-BZ)-based composite materials were prepared by a modified Pechini sol-gel method combined with exsolution. Two different LB-BZ composites were prepared through two alternative thermal treatments ... -
Effect of Zr addition on overaging and tensile behavior of 2618 aluminum alloy
(Journal article; Peer reviewed, 2019)The effect of Zr addition on overaging and tensile behavior in a 2618 Al–Cu–Mg–Ni–Fe alloy has been investigated in this study. The chemical composition of the base 2618 alloy, containing ~0.1 wt % of Zr, was modified by ... -
The (love & hate) role of entropy in process metallurgy
(Journal article, 2019)Abstract. Process metallurgy is the basis for the production, refining and recycling of metals and is based on knowledge of transport phenomena, thermodynamics and reaction kinetics, and of their interaction in high ... -
Optimisation of Zn-Mn co-electrodeposition on aluminium utilising direct- and pulse current in alkaline and acidic electrolyte
(Master thesis, 2019)Aluminium som blir brukt i varmevekslere er utsatt for korrosjon i spesielt aggressive omgivelser. Beskyttelse av aluminiumoverflaten er viktig for å beholde mekaniske og kjemiske kvaliteter i prosessene den blir brukt ... -
Oxidation of Liquid Silicon in Air Atmospheres Containing Water Vapor
(Peer reviewed; Journal article, 2019)The oxidation of silicon (Si) has been extensively investigated over the past 50 years. Yet, an understanding of the mechanism and rate of liquid Si oxidation in atmospheres containing water vapor, is lacking. The effect ... -
Korrelasjon mellom livsstadie, lipidinnhold og akkumulering av polysykliske aromatiske hydrokarboner (PAH) i rognkjeks (Cyclopterus lumpus) embryo eksponert for produsert vann
(Bachelor thesis, 2019)Hensikten med denne bacheloroppgaven var å studere korrelasjonen mellom livsstadier, lipidsammensetning og bioakkumulering av polysykliske aromatiske hydrokarboner (PAH) i fiskearten rognkjeks (Cyclopterus lumpus). Arbeidet ... -
Assessment of advanced Taylor models, the Taylor factor and yield-surface exponent for FCC metals
(Journal article; Peer reviewed, 2019)High-resolution crystal plasticity-finite element method (CPFEM) simulations are performed to provide new reference values of the Taylor factor M and the isotropic yield surface exponent for high stacking fault energy ...