Sökning: "chromium oxide"

Visar resultat 11 - 15 av 83 avhandlingar innehållade orden chromium oxide.

1. 11. The Breakdown of the Protective Oxide on 11% Chromium Steel The Influence of Water Vapour and Gaseous KCl

   Författare :Karin Segerdahl; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; 11-Cr-steel; flow rate; water vapour; KCl g ; CrO2 OH 2; temperature dependence; oxidation; breakaway corrosion; chromium evaporation;

   Sammanfattning : The first part of this thesis is focused on the influence of water vapour on the oxidation of X20 steel (CrMoV 11 1). Three parameters were investigated; pH... LÄS MER

3. 12. Accident-tolerant uranium nitride

   Författare :Aneta Herman; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; accident-tolerant fuel; uranium nitride; chromium; glucose; internal sol-gel;

   Sammanfattning : After the nuclear accident at Fukushima-Daiichi in 2011, a search for alternatives to a current fuel-clad standard UO2-Zircaloy was encouraged by government and industry and novel fuel-clad systems were selected. These systems are often referred to as Accident Tolerant systems, because of an improved response to severe accidents. LÄS MER

4. 13. Electrical Characterization of Partial Discharge Resistant Enamel Insulation

   Författare :Tuan Anh Hoang; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Enamel wire insulation; dipolar polarization; charge injection; charge transport; chromium oxide; dc conductivity; partial discharge; twisted pair.; dielectric permittivity;

   Sammanfattning : Adjustable speed drives for rotating machines have become increasingly popular as they provide possibilities of smooth and accurate process control as well as for energy savings. In such systems, due to the fact that the voltage applied at terminals of motor windings is no longer purely sinusoidal but characterized by a high content of harmonics, the appearing electrical and thermal stresses yield premature failures of the winding insulation, mainly because of an increased partial discharge (PD) activity. LÄS MER

5. 14. Thermodynamic Investigation of Co-Cr Alloys

   Författare :Thérèse Sterneland; KTH; []
   Nyckelord :Cobalt; chromium; experimental thermodynamics; solid state galvanic cell technique; differential scanning calorimetric technique DSC ; CALPHAD-technique; Thermo-Calc; phase diagram; experimental data;

   Sammanfattning : In a collaborative effort between the Divison of Metallurgyand the Divison of Computational Thermodynamics, RoyalInstitute of Technology (KTH), Stockholm, Sweden, experimentalinvestigations have been carried out in the binary Co-Crsystem. The experimental strategy has been to measure thethermodynamic activities of Cr by the solid oxide electrolytegalvanic cell technique, as well as to measure the molar heatcapacities of the alloys, as function of temperature, by theDSC technique. LÄS MER

7. 15. Microstructural analysis on the oxidation of high temperature materials

   Författare :Jun Eu Tang; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; chromium steel; TEM; SEM; molybdenum disilicide; high temperature oxidation; oxide microstructure; EDS; thermal barrier coating;

   Sammanfattning : .... LÄS MER