Essays about: "vibrational"

Showing result 11 - 15 of 67 essays containing the word vibrational.

  1. 11. Ab inito calculation of the formation energy of the sigma phases at 1000 Kelvin : With a five sublattice model for the ternary Iron-Chromium-Nickel system

    University essay from KTH/Materialvetenskap

    Author : Fabian Mathias Veid; [2022]
    Keywords : ;

    Abstract : This project investigates the σ-phase formation energy at 1000 Kelvin using Exact Muffin TIn Orbital (EMTO) method and considers the disordered local moment approach to handle the paramagnetism in a self-consistent manner. The sigma phase is detrimental and causes embrittlement when it occurs primarily in stainless steel and superalloys with Iron (Fe) and Chromium (Cr), which is why it is necessary to understand it better and therefore avoid it. READ MORE

  3. 12. Time-resolved x-ray diffraction study of longitudinal optical phonons in zincblende semiconductors

    University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Author : Lassi Linnala; [2022]
    Keywords : femtosecond THz radiation; ultrafast x-ray diffraction; pump-probe; longitudinal optical phonons; zincblende semiconductors; anharmonic decay; density functional perturbation theory; Physics and Astronomy;

    Abstract : Anharmonic decay of longitudinal optical (LO) phonons in zincblende semiconductors is not at present well characterized due to the polar and many-body nature of the problem. Femtosecond THz radiation offers a novel route to this study, as the interaction of this radiation is directly with the phonon lattice and these THz excited phonons do not have enough energy to excite electrons over the band gap. READ MORE

  4. 13. Study of luminescent and energy properties of CsPbBr3 and CsPbI3 nanoplatelets

    University essay from Uppsala universitet/Institutionen för fysik och astronomi

    Author : Taddeo Salique; [2022]
    Keywords : quantum confinement; nanoplatelets; CsPbBr3; CsPbI3; semiconductor; exciton; perovskite nanocrystals;

    Abstract : Halide perovskite semiconductor nanocrystals have been studied a lot recently because they allow a precise control over the entire visible emission spectrum and as a result, the possibility of a variety of light-emitting applications. In this study, cesium lead bromide CsPbBr3 and cesium lead iodide CsPbI3 nanoplatelets of 3, 4 and 5 monolayers (ML) have been synthesized. READ MORE

  5. 14. Dynamic Analysis of a Window connected via the Click-In System

    University essay from Linnéuniversitetet/Institutionen för maskinteknik (MT)

    Author : Abhikaran Bhatia; [2022]
    Keywords : Finite Element Modelling; Vibrational Analysis; MSC Nastran; MSC Apex;

    Abstract : It is often needed to predict the behavior of structures. With the helpof an FE model, it is possible to see the motion of the structure. Inthis, Master thesis work time domain analyses were carried out on afinite element model representing a window attached by click-ins. READ MORE

  6. 15. Development of extension tool for high dynamic tightening : Degree project in Mechanical Engineering, specialisation Machine Design

    University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Author : Hugo Axelsson; [2022]
    Keywords : tightening; Dynamic; Extension;

    Abstract : Atlas Copco Industrial Technique AB is a global supplier of systems, software, services, and tools for the global assembly industry with keywords such as ergonomics, productivity, and traceability central to Atlas Copco’s products. The objective of the thesis was to construct a prototype tool based on the result of a previous course held at Luleå University of technology. READ MORE