Search for dissertations about: "deposition conditions"

Showing result 1 - 5 of 437 swedish dissertations containing the words deposition conditions.

2. 1. Epiphytic lichen responses to nitrogen deposition

   Author : Otilia Johansson; Kristin Palmqvist; Johan Olofsson; Annika Nordin; Lars E Ericson; Peter Crittenden; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Lichens; air pollution; nitrogen deposition; phosphorus; growth; chlorophyll a; boreal forest; field experiment; irrigation; carbon based secondary compounds; Lavar; luftföroreningar; alg; svamp; kväve; fosfor; skog; Terrestrial ecology; Terrestrisk ekologi; ekologisk botanik; Ecological Botany;

   Abstract : Nitrogen (N) deposition has increased globally over the last 150 years and further increase is predicted for the future. Nitrogen is an important nutrient for lichens, involved in many processes in both photobiont and mycobiont.  However, N can be a stressor, causing many lichens and lichen communities to disappear with increased deposition. READ MORE

4. 2. Laser-Directed Energy Deposition : Influence of Process Parameters and Heat-Treatments

   Author : Suhas Sreekanth; Joel Andersson; Shrikant V. Joshi; Högskolan Väst; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Directed Energy Deposition; Alloy 718; Process Parameters; Heat Treatments; Nb- rich Phases; Production Technology; Produktionsteknik; Manufacturing and materials engineering; Produktions- och materialteknik;

   Abstract : Laser-Directed Energy Deposition (L-DED), an Additive Manufacturing (AM) processused for the fabrication of parts in a layer-wise approach has displayed an immense potential over the last decade. The aerospace industry stands as the primary beneficiary due to the L-DED process capability to build near-net-shape components with minimal tooling and thereby producing minimum wastage because of reduced machining. READ MORE

5. 3. A Study of Group 13-Nitride Atomic Layer Deposition : Computational Chemistry Modelling of Atomistic Deposition Processes

   Author : Karl Rönnby; Lars Ojamäe; Henrik Pedersen; Simon Elliott; Linköpings universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : The crystalline solids aluminium nitride (AlN), gallium nitride (GaN) and indium nitride (InN), together with their alloys, are of huge interest in the semiconductor industry. Their bandgaps span an extensive range from 6.0 eV for AlN to 0.7 eV for InN, with GaN in between at a bandgap of 3. READ MORE

6. 4. An Insight into the Critical Role of Microstructure and Surface Preparation on Localized Conversion Coating Deposition on Cast Al Alloys

   Author : Salil Sainis; Caterina Zanella; Ehsan Ghassemali; Marjorie Olivier; Jönköping University; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; aluminium alloys; cast Al-Si alloys; conversion coating treatment; cerium; localized deposition; surface preparation; microstructure; SEM; FIB-SEM; AFM-SKPFM; Aluminiumlegeringar; gjutna Al-Si legeringar; Cerium; lokal deposition; omvandlingsbeläggningsbehandling; förbehandling av yta; mikrostruktur; SEM; FIB-SEM; AFM-SKPFM;

   Abstract : The spontaneous cerium conversion coating formation over aluminium alloys is affected by the chemical process conditions, the surface preparation prior to conversion treatment and the microstructure of the underlying alloy. Most research performed until now focus only on the former whereas the influence of the latter two is poorly understood. READ MORE

7. 5. Vapor phase deposition of WO and WC

   Author : Per Tägtström; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Chemistry; vapor deposition; ALE; CVD; tungsten oxide; epitaxy; nanocrystals; tungsten carbide; Kemi; Chemistry; Kemi; Inorganic Chemistry; oorganisk kemi;

   Abstract : WO3 and WC are two compounds that are widely used for a number of different thin film applications. In this thesis, these compounds have been deposited using two different deposition methods: atomic layer epitaxy (ALE) and chemical vapor deposition (CVD). READ MORE