636-0813/01 – Surface Properties and their Treatment (VaÚP)
| Gurantor department | Department of Material Engineering | Credits | 5 |
| Subject guarantor | prof. Ing. Vlastimil Vodárek, CSc. | Subject version guarantor | prof. Ing. Vlastimil Vodárek, CSc. |
| Study level | undergraduate or graduate | Requirement | Choice-compulsory |
| Year | 2 | Semester | winter |
| | Study language | Czech |
| Year of introduction | 2004/2005 | Year of cancellation | 2019/2020 |
| Intended for the faculties | FMT | Intended for study types | Follow-up Master |
Subject aims expressed by acquired skills and competences
- Explain what is the essence of the interfacial energy excess and how the
phenomena related to it affect crystallization, phase transformations and fracture
mechanics.
- Describe the methods used to characterize microgeometry of solid surfaces.
- Clarify the reason of the selective evaporation of components in mixed phases and its technological consequences.
- Explain how solid surfaces can be modified in order to optimize their properties
with emphasis on plasma technologies.
- Interpretation of the phenomenon of epitaxy and the way it can be used to
optimize joints of two materials.
- Explain the catalytical effect of interfaces on chemical processes.
- Deal with surface active substances and the way they influence properties of dispersion systems,
nanostructured substances, emulsions, colloids and foams.
- Describe the part a structured internal surface plays in modern adsorbents,
zeolites and intercalation compounds.
Teaching methods
Lectures
Tutorials
Experimental work in labs
Summary
Properties and structural features of surfaces, interfaces and thin layers, their thermodynamics and kinetics of surface specific processes, physiosorption, chemisorption, relaxation and reconstruction.
Surface tension, growth and morphology of crystals, selective evaporation, faseting, parcial melting and surface melting of crystals. Adhesion, cohesion and tribology, Highly dispersed systems, colloids, thin films, emulsions, foams, tensides, zeolites and intercalates, epitaxy and heterogenous catalysis. Surface
engineering, especially modern plasma technology and testing.
Compulsory literature:
1] Burakowski T., Wierzchoň T., Surface engineering of metals: principles, equipment, technologies. CRC Press, 1999, 592 p.
Recommended literature:
[1] Luth H., Surfaces and interfaces of solid materials. Springer, Berlin 2001, 559 p.
Way of continuous check of knowledge in the course of semester
E-learning
Other requirements
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Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
Lectures:
1. The surface of the crystal, fysiosorption and chemisorption, surface structure and its description, the specific surface properties and thin layer, epitaxy and topotaxy, laser technology, imaging techniques for monitoring of the surface atomic structure
2. The structure of grain boundaries, random boundaries, coincidence boundaries, the basic model of surface structural units, crystallography of crooked spaces, quasicrystalic structure of interface, nanostructured materials, colloidal state of matter
3. Crystallographic description of the surface, relaxation of clean surfaces, segregation on clean surfaces, preferential adsorption sites and arrangement of molecules on the substrate, co-adsorption, adsorbate induced surface relaxation, surface reconstruction induced or removed by adsorbate
4. Modification of reconstructionhe of the clean surface by adsorbate, "Bulk" adsorbate, adsorbate-induced surface segregation, the dynamic surface structure, surface tension, Young-Laplace equation,
periodisation, mechanisms and factors influencing sintering, Kelvin equation, Herring formula, surface and intersurface energies of metals, Gibbs-Curie-Wulf-Bravaisova sentence, surface tension and crystal shape, stereoselective adsorption
5. Crystal structure and its morphology, crystallograms, the mechanism of crystal growth, bevelling surface, partial anatexy and complete melting of crystal from the surface to the depth, selective evaporation of components, microgeometry of surface and its quantitative evaluation. Mechanical, electrical, pneumatic comparators,
photoelectric and touch profilemeters.
6. Scanning tunneling microscopy, inclined and spherical sections, the method of light cutting, shadow method of light cutting, interference measurement of surface microgeometry, micro-photogrammetry, optical measurements of carrier share, the characteristics of surface roughness, master curve, probability density of profile, the autocorrelation function and its random and periodic components, spectral analysis of surface micro-geometry and its three-dimensional evaluation
7. Fractal analysis of surface microgeometry, Langmuir layers, Langmuir-Blodgett layers, molecular electronics designed by the technology of Langmuir-Blodgett layers
8. LB-layers as a carrier of information during crystal growth. Two-dimensional structures, foams and skeletons, metal foams (cellular metals), aerogels, epitaxy, endotaxy and topotaxy in microelectronics and petrography, topotactic reactions in solids
9. Crystallography of topotactic reactions and its application in materials engineering, coherence of atomic structure at interface, tolerance at surface reconstruction, Landolt-Bornsteinova database
10.X-ray diagnostics and prediction of epitaxial contacts. Surface treatments, coatings, phosphating, galvanizing, carbonitriding, nitriding, plasma technology of surface modifications and production of thin layer coatings
11. PVD - CVD techniques, powders for plasma spraying, ndustrial applications of plasmatic deposition processes, evaporation, sputtering, ion plating, ion implantation, thermal spraying, silicate coatings, enamels, surface heat treatment, mechanical modifications of surface
12. Inclusive compounds, intercalation, pillar clays, polymerisation of layered intercalation compounds, emulsions
13.Heterogeneous catalysis, two-dimensional chemical technology, zeolites zeotypes,
topotactic reactions on the inner surface of zeolites
14. Catalysis on polymer carriers, metallic glasses as catalysts, binding and activation of adsorption, adsorption kinetics, adsorption isobar, fluid and localized phase of adsorbate, the inner surface of dispersive materials
Exercises:
1. Determination of surface roughness.
2. Determination of coating thickness by coulometric method.
3. Microhardness.
4. Microscopic evaluation of ceramic layers.
5. Adhesion of coatings and layers.
6. X-ray fluorescence analysis of the elemental composition of surface layers.
7. X-ray diffraction analysis of the surface layers.
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction