Obor: Materials

Identifiability analysis of parameters in Laser Shock Peening simulations

Laser shock peening (LSP) is used to improve the strength and fatigue resistance of components by hardening their surface. In our lab we have developed a framework for LSP simulation, which is based on the finite volume method. The critical component of the framework is the dynamic simulation of the elastoplastic shockwave that subjects the…

4G/5G remote communication and data acquisition – 2

Proton exchange membranes are the important part of proton exchange membrane fuel cells (PEMFCs) which is considered as one promising clean and highly efficient power generation technology in 21st century. The currently available proton exchange membranes are not stable under long-term usage and are not economical. Despite the currently promising achievements of PEMFCs, there are…

Diagnostics of Reactive Plasma Using a Planar High-Frequency Probe During the Deposition of Layers with Antiviral Effects

As part of the internship, the student will be involved in the research of plasma deposition of crystalline CuFeO2 layers with antiviral effects. The deposition of CuFeO2 layers will be carried out using the method of reactive pulsed magnetron sputtering with an additional high-frequency inductively coupled plasma operating in resonance with the electron cyclotron wave.…

Preparation and Optimization of Inorganic Crystals for the Detection of Ionizing Radiation

During the internship, the student will become familiar with the characterization and preparation of crystals for scintillation detectors of ionizing radiation. The crystals will be prepared using the modern micro-pulling-down method, which is currently available only at the Institute of Physics of the Czech Academy of Sciences. The influence of composition (stoichiometry) of gadolinium-gallium-aluminum garnet-based…

Ph.D. thesis: Study of the influence of transients phenomena in piezoceramics in terms of fracture-mechanical response

The aim of this work is to determine and explain the change in mechanical behaviour due to transients with emphasis on the fracture mechanical response in selected lead-free piezioceramics. The main goal of the doctoral thesis will be to study the mechanical and fracture behaviour of piezoceramics (for example BTO, BTZC, etc.) during its transition…

Ph.D. thesis: Microscopic processes at the fatigue crack tip

Fatigue crack growth is a process that is described macroscopically by quantities such as the stress intensity factor, J-integral or plastic part of the J-integral. There are many models of crack propagation at the microscopic level that consider plastic deformation around the crack tip, but which differ in details. Advances in experimental methods allow more…

Ph.D. thesis: Development of hybrid composites compensating shrinkage at pyrolysis

This work aims to design and describe suitable methods of shrinkage compensation and/or control for the preparation of matrix composites and their effect on microstructural changes and fracture behaviour of hybrid composite materials containing such adapted matrix and ceramic fibres. The main goal of the doctoral thesis will be the design and characterization of hybrid…

Application of Molecular Dynamics in Materials Research

Molecular Dynamics (MD) is a computer simulation method that describes the motion of atoms and molecules. The trajectories of atoms and molecules are typically determined by numerically solving Newton’s equations of motion for a system of interacting particles, where the forces between particles and their potential energy are often calculated using interatomic potentials or molecular…

Functional nanolayers for the real world

The student will become familiar with the procedures for the preparation, characterization, and application of functional nanolayers with so-called antifouling properties during their internship, which can have wide applications in the real world. They will learn methods such as post-modification of polymer layers to anchor bioreceptors to the surface, achieving targeted functional properties of the…

Application of Cohesive Elements in Modeling Fracture of Heterogeneous Materials

The fracture process of concrete is a complex mechanism influenced by its highly heterogeneous internal structure: matrix/cement paste, aggregate, and pores. Damage development occurs at the interface between the cement paste and aggregate, where microcracks can form. The offered internship will focus on 2D/3D numerical modeling of this process using cohesive elements available in ANSYS…