Materials Literature
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Die vorliegende Arbeit untersucht die Wirkungen, die diese multi-axialen Beanspruchungen, auf eine γ-TiAl, Legierung\nunter thermo-mechanischer Ermüdung haben. Das ein-achsige, torsions- und axial-torsionale thermo-mechanische\nErmüdungsverhalten dieser γ-TiAl Legierung ist bei 400 - 800oC mit Dehnungsamplituden von 0…
The controlled cooling of steel on the runout table has become a standard practice in the production of flat hot-rolled products, and since its introduction by BISRA in 1957, has been adopted because it is a vital tool in meeting the increasing demand of steels with better quality and higher mechanical properties. Alt…
Hydration of magnesia-based refractory bricks could occur during storage, during drying after installation, or in service, and the hydration would cause damage to refractory bricks and furnace linings. In order to understand the hydration mechanisms of magnesia-based refractories, three types of bricks were chosen: ma…
In the cells, the last step of the beta-oxidation cycle, aiming at the degradation of fatty acids, is catalyzed by the enzyme named thiolase. It shortens the acyl chain of the acyl-CoA by two carbons. The reaction is reversible, it can proceed for both directions. Thiolases are divided into two categories, synthetic a…
We investigated a nanoscale inertia sensor based on telescoping carbon nanotubes (CNTs) using classical molecular dynamics simulations. The positions of the telescoping CNTs are controlled by the centrifugal forces exerted by the rotation platform and thus position shifts are determined by the capacitance between CNTs…
the microstructural features of the weld section which are controlled by the energy input and heat transfer factors. The welding current, travel speed and the material property govern these parameters. However, the specific influence of range of heat input rates on the microstructural features of FSS weld is hardly re…
Thesis (Master, Mechanical and Materials Engineering) -- Queen's University, 2009-12-19 16:39:12.071
Direct fuel injection technology is increasingly being applied to the spark ignition internal combustion engine as one of the many actions required to reduce the CO2 emissions from road transport. Whilst the potential for CO2 reductions is compelling, the technology is not without disadvantages. Early examples typical…
Phosphorus is an essential element for all known forms of life. In the form of phosphate, this nutrient is retained in soils and sediments by sorption on mineral particles, clays and other soil constituents. In addition, phosphate precipitates with metal ions to form a range of phosphate containing minerals, and only…
The Fe-C-Cr-Mn-Ni-O system is of fundamental importance when describing the influence of oxygen on high alloyed steels. Both solid and liquid phases are of great interest: The solid phases regarding oxidation processes like the formation of oxide layers, inner oxidation, sintering processes and high temperature corros…
Dissertation presented in partial fulfillment of the requirements for the degree of Master in Biotechnology
Reactive oxygen species (ROS), which include free radicals such as superoxide (O2−) and hydroxyl radicals (HO•), as well as non-radical molecules such as hydrogen peroxide (H2O2), are constantly be...
This thesis describes an investigation of the origin, genetic diversity and\ntaxonomy of Didymosphenia geminata, in New Zealand. D. geminata,\ncommonly known as Didymo or Rock Snot , is a freshwater diatom, a\nphotosynthetic alga with a silica shell. It attaches to rocks and plants by its\nmucilaginous stalks, its lar…
This thesis presents two main developments in the modelling of power transmission lines for the simulation of electric networks. The first one is a wide bandwidth circuit corona model and the second a phase-domain multiphase full frequency-dependent line model. The latter can be easily used in connection with the form…
As the range of applications for fiber-reinforced polymer (FRP) composite materials in civil engineering constantly increases, there is more and more concern with regard to their performance in critical environments. The fire behavior of composite materials is especially important since complex physical and chemical p…
Podczas spalania polimerów wydziela się dużo energii, dymów oraz gazowych produktów, mających często właściwości toksyczne. Dlatego palność większości polimerów ogranicza ich stosowanie do wytwarzania niektórych wyrobów dla zastosowań obronnych i cywilnych. Omówiono podstawowe kryteria i metody badań polimerów w aspek…
Abstract This article reviews the mechanistic and practical aspects of free radical polymerization with reversible addition–fragmentation chain transfer—the reversible addition–fragmentation chain transfer (RAFT) process. RAFT is conducted by the addition of a thiocarbonylthio compound (ZC(S)SR) to a conventional rad…
The present research was directed at adequate prediction of the temperature, deformation behavior (roll force, flow stress, strain and strain rate) and micro structural evolution (recovery, recrystallization, grain growth, austenite and ferrite grain sizes) during rolling in the Compact Strip Production (CSP) process,…
A novel approach has been used to analyse the flow of heat during the plasma spray coating process. The approach couples heat transfer processes occurring at the micro scale, within the coating, and at the macro scale, in the substrate, using a combination of finite-element and finite-difference based models. One of t…
Chitosans with different average molecular weight (1,500-156 kDa) were prepared under optimal conditions based on our previous research by the depolymerization of initial chitosan using hydrogen peroxide, with maintaining the native structure of natural chitosan as principal consideration. Nitrogen and Carbon componen…