Sökning: "crystal orientation"

Visar resultat 1 - 5 av 111 avhandlingar innehållade orden crystal orientation.

1. 1. Nickel-Based Single-Crystal Superalloys : the crystal orientation influence on high temperature properties

   Författare :Mikael Segersäll; Johan Moverare; Kjell Simonsson; Daniel Leidermark; Roger Reed; Linköpings universitet; []
   Nyckelord :;

   Sammanfattning : Superalloys are a group of materials that are used in high temperature applications, for example gas turbines and aero engines. Gas turbines are most commonly used for power generation, and it is only the very critical components which are exposed to the most severe conditions within the turbine, which are made from superalloy material. LÄS MER

3. 2. Dissolution of fluorite type surfaces as analogues of spent nuclear fuel : Production of suitable analogues and study the effect of surface orientation on dissolution

   Författare :Jose Godinho; Sandra Piazolo; Tonci Balic-Zunic; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; fluorite; spent nuclear fuel; crystal structure; CeO2; CaF2; crystal orientation; topography; confocal profilometry; Mineralogy; Mineralvetenskap; Geology; geologi;

   Sammanfattning : It is accepted worldwide that the best final solution for spent nuclear fuel is to bury it in deep geological repositories. Despite the physical and chemical barriers that are supposed to isolate the nuclear waste for at least 100.000 years, some uncertainty factors may cause underground water to get in contact with the nuclear waste. LÄS MER

4. 3. Membrane Orientation Studies with Polarized Light Spectroscopy

   Författare :Malin Ardhammar; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; lipid vesicle; membrane orientation; flow linear dichroism; oriented circular dichroism;

   Sammanfattning : Lipid vesicles are versatile tools in modern biophysical science. They can be used as models of the cell membrane, to examine permeability, stability and behavior of molecules in the bilayer. They may act as transporters in a pharmacological context, designed to deliver their cargo to a certain place in the patient. LÄS MER

5. 4. Low dimensional Zinc- and Copper Oxides and their Electronic, Vibrational and Photocatalytic Properties

   Författare :Jakob Thyr; Tomas Edvinsson; Thomas Wågberg; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ZnO; Cu2O; CuO; Cu4O3; Photocatalysis; Raman spectroscopy; Nano materials; Quantum confinement; Quantum dots; Size dependent properties; Crystal orientation; Density functional theory; Engineering Science with specialization in Solid State Physics; Teknisk fysik med inriktning mot fasta tillståndets fysik;

   Sammanfattning : Pollution of water resources is a growing problem in the world and this has drawn the attention to photocatalysis, which is an emerging technology for water purification. In this thesis, low dimensional zinc oxide and copper oxides, which are promising photocatalytic materials, have been studied. LÄS MER

7. 5. Theory of Crystal Fields and Magnetism of f-electron Systems

   Författare :Massimiliano Colarieti Tosti; Olle Eriksson; Walter Temmerman; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Theoretical physics; Crystal Field; Magnetism; Electronic Structure; Teoretisk fysik; Physics; Fysik;

   Sammanfattning : A parameter free approach for the calculation of the crystal field splitting of the lowest Russel-Saunders J-multiplet in f-electron systems has been developed and applied to selected compounds. The developed theory is applicable to general symmetries and is based on symmetry constrained density functional theory calculations in the local density or in the generalised gradient approximation. LÄS MER