Search for dissertations about: "zr"
Showing result 1 - 5 of 140 swedish dissertations containing the word zr.
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1. The Zr-Cu, Hf-Cu, Zr-Ni and Hf-Ni systems : phase diagrams and crystal structures of intermediate phases
Abstract : .... READ MORE
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2. Me-Si-C (Me= Nb, Ti or Zr) : Nanocomposite and Amorphous Thin Films
Abstract : This thesis investigates thin films of the transition metal carbide systems Ti-Si-C, Nb-Si-C, and Zr-Si-C, deposited at a low substrate temperature (350 °C) with dc magnetron sputtering in an Ar discharge. Both the electrical and mechanical properties of these systems are highly affected by their structure. READ MORE
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3. In-situ phase studies of the Zr-H system
Abstract : Zirconium alloys are widely used in the nuclear industry because of their high strength, good corrosion resistance and low neutron absorption cross-section. However, zirconium has strong affinity for hydrogen, which may lead to hydrogen concentration build-up over time during a corrosion reaction when exposed to water. READ MORE
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4. Studies of transport in oxides on Zr-based materials
Abstract : Zr-based materials have found their main application in the nuclear field having high corrosion resistance and low neutron absorption cross-section. The oxide layer that is formed on the surface of these alloys is meant to be the barrier between the metal and the corrosive environment. READ MORE
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5. Modified oxygen and hydrogen transport in Zr-based oxides
Abstract : Most metals and alloys in the presence of oxygen and moisture will instantaneously react and form a thin (2-5 nm) surface oxide layer. For further reaction to occur, oxygen ions and/or metal cations often diffuse through the already formed oxide layer. READ MORE