Materials Literature
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Correction for ‘An environmentally benign approach to achieving vectorial alignment and high microporosity in bacterial cellulose/chitosan scaffolds’ by Guohui Li et al. , RSC Adv. , 2017, 7 , 13678–13688.
Magnesium oxide and sulfide spinels have recently attracted interest as cathode and electrolyte materials for energy-dense Mg batteries, but their observed electrochemical performance depends strongly on synthesis conditions. Using first principles calculations and percolation theory, we explore the extent to which sp…
Processing carbon fiber composite laminates creates molecular-level strains in the thermoset matrix upon curing and cooling which can lead to failures such as geometry deformations, micro-cracking, and other issues. It is known strain creation is attributed to the significant volume and physical state changes undergon…
by European Commission 7 th Framework Program, Grant 233926.The project joined efforts of excellent partners on development of infusion simulation technologies for large composite structures.Small part of experience gained is summarised in this thesis under thorough guidance of my supervisor.For countless discussions…
The following paper addresses the connection between two classical models of phase transition phenomena describing different stages of clusters growth. The first one, the Becker-Doring model (BD) that describes discrete-sized clusters through an infinite set of ordinary differential equations. The second one, the Lifs…
This thesis demonstrates a method for transformer core diagnostics. The method uses the no-load current of the transformer as an indicator, and gives different characteristic signatures for different types of faults or defects. Using the no-load current for the diagnostic gives high sensitivity. The method is therefor…
Concrete is one of the most used building materials in the world because of its good properties. However, cement which is one of the main components in concrete, produces a high amount of heat during the hydration process. The generated heat leads to temperature rise inside the structure. This temperature rise becomes…
In experiments on metallic microwires, size effects occur as a result of the interaction of dislocations with, e.g., grain boundaries. In continuum theories this behavior can be approximated using gradient plasticity. A numerically efficient geometrically linear gradient plasticity theory is developed considering the…
This report describes a study on the effects of ground granulated blast furnace slag, low calcium fly ash and metakaolin on the hydration behavior of different binder pastes blended with these SCM. The study investigated early heat development, phase assemblages at different ages, strength gain, changes in porosity an…
Two-dimensional materials with atomic thickness have attracted a lot of attention from researchers worldwide due to their excellent electronic and optical properties.As the silicon technology is approaching its limit, graphene with ultrahigh carrier mobility and ultralow resistivity shows the potential as channel mate…
In der vorliegenden Arbeit werden Kohlenstoffkurzfasern (0,2 bis 10 mm) in Portlandzementmörtel homogen dispergiert und der resultierende Verbundwerkstoff hinsichtlich seiner 3-Punkt Biegezugfestigkeit und einaxialen Druckfestigkeit untersucht. Es wird die Fasergeometrie, der Fasergehalt und die Oberflächenchemie der…
technical reference for hydrogen compatibility of materials guidance on materials selection for hydrogen service is needed to support the deployment of hydrogen as a fuel as well as the development of codes and standards for stationary hydrogen use hydrogen vehicles refueling stations and hydrogen transportation mater…
This report presents briefly the test methods used, within the in the EERA JPNM Pilot Project TASTE, for defining the tensile and creep material properties relevant to the integrity of nuclear fuel claddings. These properties are challenging to extract from thin walled tubes since the standard test methods use test sp…
Magnesium is the lightest of the structural metals and has great potential for reducing the weight of transportation systems, which in turn reduces harmful emissions and improves fuel economy. Due to the inherent softness of Mg, other elements are typically added in order to form a fine distribution of precipitates du…
Fossil fuel based electricity, the primary source of energy in the apparel production process, causes a great deal of greenhouse gas (GHG) emissions. Due to ever-increasing apparel demand and population growth, this industry's carbon footprint only grows bigger. The purpose of this exploratory study were to (a) identi…
Die Sicherstellung der Dauerhaftigkeit chemisch beanspruchter Betonbauteile und Betonbauwerke erfolgt nach dem derzeit gültigen Normenwerk deskriptiv. Das auf Erfahrungswerten beruhende Nachweiskonzept stößt jedoch an Grenzen, wenn durch den Einsatz neuer Betone, Baustoffe und Bauweisen der normativ abgesicherte Erfah…
Acoustic holography method has been shown to provide accurate reconstruction of 3D ultrasound fields generated by various medical transducers including multi-element arrays as well as to set a boundary condition for nonlinear field modeling at high pressure levels. Here an approach of measuring holograms of individual…
In-situ solidification experiments of Al-Cu and Al-Ge samples were performed using a laboratory X-ray facility. During constant cooling of the sample, dendritic growth was observed in real-time which made the analysis of dynamic growth characteristics feasible. The dendritic growth morphologies in the alloys differ: D…
Operations with drilling fluids require multiple performance requirements. Among those, fluid loss issue is a very severe problem that is encountered in many drilling operations. Rheological and transport properties of drilling muds in porous media control the fluid loss behavior in reservoir formations. Additionally,…
Grey cast irons are a group of alloys with a unique combination of properties in terms of mechanical performance and castability. These properties are strongly related to their composite structure where graphite precipitates are embedded in a metallic matrix. The graphite precipitates form during solidification and gr…