Profile of the branch:|
The curriculum concentrates on the comprehensive study of materials properties and failure processes from the point of view of physics and physical metallurgy. Students should develop capability to apply their knowledge in inventive manner to new technologies and materials, such as plasma spraying, special methods of thermo-mechanical and thermo-chemical treatment, etc. Special attention is paid to the degradation processes and to the synergetic effects of various materials properties on material failure. The subjects of study are metallic and non-metallic materials, e.g., structural ceramics, polymers, amorphous and nanocrystalline materials and intermetallics.
The Ph.D. programme requires proficiency in mathematics and physics at the MSc. degree level obtained from Faculty of Science or Faculty of Mechanical Engineering.
Key learning outcomes:|
Occupational profiles of graduates with examples:|
Issued topics of Doctoral Study Program:|
- Ab initio study of phase stability of transition metal alloys
Relative stability of phases for different binary alloys can be successfully studied with help so called first-principle or ab initio simulations. These methods are based only on basic postulates of quantum mechanics and do not need any input experimental data. Obtained results will be used as input data for advanced thermodynamic modeling.
Dissertation work will be focused on estimation of equilibrium structural parameters and heats of formations for different alloys and their relative stability with help of ab initio calculations. The PAW method implemented in simulation package VASP will be used these work. For study of disordered or doped alloys the EMTO-CPA method will be used.
- Consolidation and shaping of ceramic nanoparticles by colloidal approaches
The subject of the PhD study is focused on shaping and compaction of nanoceramic oxide particles. The main task of the student will contain a study of bulk ceramics processing using ceramic particles with size below 100 nm via wet shaping methods. The research will concern primarily with methods of direct consolidation of ceramic particles. A common difficulty of all these methods lies in the preparation of a stable concentrated suspension of nanoparticles with appropriate viscosity. The solution of the problem assumes understanding and utilization of colloidal chemistry and rheology of ceramic suspensions.
- Cyclic plasticity of materials produced by SLM technique
Additive manufacturing technologies (AM) are in the focus of experts in materials processing area. These methods allow rapid prototyping of structural parts namely if conventional technologies are inconvenient or particular part cannot be produced in classical way. One of increasingly used methods for production of parts of high quality and low cost together with simple reproducibility is Selective Laser Melting method (SLM). For broader application of alloys produced by SLM technique it is necessary to know the connection between processing parameters, microstructure and mechanical properties. This relation should be addressed not only to static loading, but to dynamic and thermal loading (in combination with mechanical loading) as well. At the beginning of doctoral research it will be necessary to optimize processing parameters of studied materials in bulk with accent on minimal porosity and presence of defects. Cyclic plasticity, fatigue durability, microstructural/substructural changes as a response of investigated material to cyclic loading will be studied in the next phase of the research.
- Modern approaches to the sintering of advanced ceramic materials
The main goal of the thesis will be the utilization of modern sintering approaches for optimization the microstructure of advanced ceramic materials. Modern methods of pressure-less sintering (rapid sintering, field assisted sintering, utilization of physically activated surfaces and controlled atmospheres) in combination with the pressure-assisted sintering (Spark Plasma Sintering, Gas Pressure Sintering, Hot Isostatic Pressing, etc. ) will be studied and developed. They will be compared each to other to find the most suitable technology for the preparation of ceramic materials with microstructure tailored for specific applications (multiferoic, transparent, luminescent, structural ceramics, etc.). As a part of the thesis, theoretical sintering models will be adapted to the novel sintering methods.
- Surface treatment technology of metallic materials and its applications using electron beam
Review of the possibilities for effective use of electron beam, especially with regard to the parameters of pro-Beam system installed in laboratories NETME Centre, for the surface modifications and coatings development. In another part of the application of selected technologies on the surfaces of steel parts to increase their resistance to oxidatation, wear and/or corrosion.
Note: Application of electron beam technology can be modified during the first year of study, according to the specific requirements of the application domain, or actual projects of the institute.