Essays about: "Johannes Brask"

Found 2 essays containing the words Johannes Brask.

1. 1. The development of scanning X-ray diffraction phase mapping techniques using automated Rietveld refinements.

   University essay from Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Fysiska institutionen

   Author : Johannes Brask; [2018]
   Keywords : Retained austenite X-ray diffraction XRD Scanning X-ray diffraction SXRD; Physics and Astronomy;

   Abstract : A methodology for determining inhomogeneities in microstructural features has been established using scanning X-ray diffraction (SXRD) and automated Rietveld refinements. The method has proven successful for spatially resolved quantitative phase analysis or "phase mapping" of retained austenite on a variety of martensitic steel samples, including carbon case-hardened steel bars and quenching and partitioning (Q&P) steel sheets. READ MORE

3. 2. STM-based characterization of single GaInP photovoltaic nanowires

   University essay from Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Fysiska institutionen

   Author : Johannes Brask; [2016]
   Keywords : STM top contact method GaInP nanowire array solar cell; Physics and Astronomy;

   Abstract : The I-V and photovoltaic properties of III-V semiconducting GaInP nanowires have been studied using a scanning tunneling microscope (STM) in evaluation for usage as a potential "sub cell" in a nanowire based tandem solar cell configuration. This evaluation required precise I-V characterization and photo response measurements of individual nanowires. READ MORE