Blar i Institutt for materialteknologi på tittel
Viser treff 1971-1990 av 2559
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Return-mapping algorithm for rate-independent crystal yield surface
(Master thesis, 2020)Hovedmålet med dette arbeidet var å utvikle en stabil og hurtig numerisk algoritme for krystallplastisitet med vilkårlige slip systemer og krystallelastisitet. Ved å bruke en regularisert flyteflate blir metodene for ... -
Reusable crucible materials and coatings for photovoltaic silicon applications
(Doctoral theses at NTNU;2021:419, Doctoral thesis, 2021)Currently, more than 90% of commercial solar cells are made from crystalline silicon. The crystalline silicon materials are classified into two types: monocrystalline and multi-crystalline silicon. Multi-crystalline silicon ... -
Revealing abnormal {11-21} twins in commercial purity Ti subjected to split Hopkinson pressure bar
(Journal article, 2019)The deformation behavior of Ti alloys during conventional deformation, such as rolling and compression,have been extensively investigated, while it is less understood during high strain rate deformation. In thepresent work, ... -
Revealing mechanisms of activated carbon capacity fade in lithium-ion capacitors
(Peer reviewed; Journal article, 2023)The capacity fade mechanism of activated carbon (AC) electrode in Li-ion electrolyte was studied via electrochemical impedance spectroscopy (EIS) and post-mortem electrode characterizations at different stages of electrochemical ... -
Revealing slip-induced extension twinning behaviors dominated by micro deformation in a magnesium alloy
(Peer reviewed; Journal article, 2020)In this study, an in situ SEM/EBSD study on slip-induced extension twinning (S→T) behaviors of a Mg–Y alloy was conducted. It shows that the S→T process cannot be well explained using the classical geometrical compatibility ... -
Revealing the factors influencing grain boundary segregation of P, As in Si: Insights from first-principles
(Journal article; Peer reviewed, 2019)Phosphorous (P) and arsenic (As) segregation at grain boundaries (GBs) usually deteriorate the electrical performance of n-type doped Si-wafers. In order to probe the factors influencing P and As segregation behaviors along ... -
Revealing the Heterogeneous Nucleation and Growth Behaviour of Grains in Inoculated Aluminium Alloys During Solidification
(Peer reviewed; Journal article, 2019)An in situ X-ray radiographic study on the grain nucleation and grain growth of inoculated Al–10Cu and Al–20Cu alloys during isothermal melt solidification and directional solidification conditions with constant cooling ... -
Revealing the heterogeneous nucleation behavior of equiaxed grains of inoculated Al alloys during directional solidification
(Journal article, 2018)An in-situ study on the directional solidification of an inoculated Al-20 wt%Cu alloy under well-controlled constant cooling rates and temperature gradients has been carried out using a microfocus X-radiography set-up. The ... -
Revealing the role of local stress on the depolarization of BNT-BT-based relaxors
(Journal article; Peer reviewed, 2019)Canonical relaxors exhibit an electric-field-induced phase transition between a macroscopically nonpolar and polar phase that can be tuned from being stable at low temperature to being reversible at high temperature. The ... -
Revealing the Slow Decomposition Kinetics of Type-I clathrate Ba8Ga16Ge30
(Journal article; Peer reviewed, 2017)Inconsistencies in high temperature thermoelectric property measurements of Ba8Ga16Ge30 have prompted our study on the thermal stability of this heavily studied inorganic clathrate. Using X-ray diffraction, thermal analysis, ... -
Revealing the Subsurface Basal <a> Dislocation Activity in Magnesium Through Lattice Rotation Analysis
(Peer reviewed; Journal article, 2020)A method was proposed in this study to reveal the subsurface basal dislocation activity in Mg-Y alloy and determine the corresponding Burgers vector. This is achieved by correlating the slip directions of dislocations to ... -
Review of Aluminum Alloy Development for Wire Arc Additive Manufacturing
(Peer reviewed; Journal article, 2021)Processing of aluminum alloys by wire arc additive manufacturing (WAAM) gained significant attention from industry and academia in the last decade. With the possibility to create large and relatively complex parts at low ... -
A Review of Ferroalloy Tapping Models
(Peer reviewed; Journal article, 2021)Tapping is an important furnace operation in the ferroalloy industry and poses a number of complex and coupled challenges of both practical and economical importance. Owing to the hazardous high-temperature conditions ... -
Revisiting Polytetrafluorethylene Binder for Solvent-Free Lithium-Ion Battery Anode Fabrication
(Journal article; Peer reviewed, 2022)Solvent-free (SF) anodes with different carbon materials (graphite, hard carbon, and soft carbon) were fabricated to investigate the stability of different anodes with polytetrafluorethylene (PTFE) degradation. The graphite ... -
Revisiting the Crystal Structure of Rhombohedral Lead Metaniobate
(Journal article; Peer reviewed, 2014)Lead metaniobate (PbNb2O6) can exist both as a stable rhombohedral and a metastable orthorhombic tungsten-bronze-type polymorph. While the orthorhombic is a well-known ferroelectric material, the rhombohedral polymorph ... -
Rheological Characterization of Fluid Models for Pitch and Binder Matrix in Anodes
(Master thesis, 2019)Karbonanoder brukes til å produsere primæraluminium og forbrukes i løpet av elektrolysen. Anodene må derfor kontinuerlig erstattes og produseres. Problemer relatert til prosesseringen av anoder inkluderer heterogen tetthet ... -
Rheological Characterization of Oil-Based Mud Enhanced with Micro-Cellulose
(Bachelor thesis, 2020)I denne studien ble de reologiske og filtreringsegenskapene til oljebasert borevæske forbedret med mikrocellulose, karakterisert og analysert. Det ble antatt at tilsetningen av mikrocellulose i borevæsken ville gi høy ... -
Rheological Characterization of Pitch and Binder Matrix with Different Concentrations of Fine Particles
(Journal article, 2019)Green anodes consist of coarse coke particles surrounded by a binder matrix, which is a viscoelastic material and is made of fine coke particles and coal-tar pitch. During the compaction process, the coarse particles ... -
Rheological properties of Al2O3–CaO–SiO2 slags
(Peer reviewed; Journal article, 2022)The Al2O3–CaO–SiO2 ternary is a basic oxide system relevant for the Pedersen alumina production process and for aluminothermic silicon production with low environmental impact using secondary aluminium and silica raw ... -
Rigid bonded glass ceramic seals for high temperature membrane reactors and solid oxide fuel cells
(Doktoravhandlinger ved NTNU, 1503-8181; 2009:85, Doctoral thesis, 2009)