Abstract. This article deals with a possibility of another extension longer lasting addition of coatings of titanium dioxide. The research based on the use of nanoparticles has development at present. Potential of added nanoparticles has large use. Particles of nanosize, i.e. below 100 nm exhibit other properties than larger particles and because of that this area is being explored in all possible sectors. This article deals specifically with the possibility of extending the lifetime of working surface molds made of aluminum alloy injection rubber mixtures used in automotive. Lifetime is longer lasting with PFTE coatings. Subsequently, it shows the effect of adding these particles at different mechanical properties in coatings on various surfaces (separated on a band saw, milling work, ground roughness 800 and 80 polished). In these cases roughness and hardness are evaluated. In the last part particles, their even distribution and size are identified. This is evaluated by electron microscopy.

The basic prerequisite for obtaining the coating of good quality is the production of a layer without the occurrence of surface defects. A possible solution to the occurrence of defects on the functional surface of the form is the application of a polytetrafluoroethylene (PTFE)-based coating. The coating helps to reduce surface roughness and “smooth” defects like pores and micro-shrinkage. For this reason, a new type and methodology of the coating were prepared to achieve more production cycles between the individual cleaning processes during the production of a tire. The subject of the study was the analysis of surface-applied micro-coatings, including the analysis of chemical composition by using energy-dispersive X-ray (EDX) and microstructure in the area of coatings. Detailed microstructural characterization of Alfipas 7818 and Alfiflon 39 and its imaging of surface structures were studied using atomic force microscopy. To examine the surface layer of the coatings, metallographic specimens of cross-sections (by means of a mold) were prepared and examined by light and electron microscopy. This new multilayer micro-coating with a thickness of 20–25 μm has been found to prevent form contamination during tire production and to extend production cycles by 200–400% between process cleanings. This finding was actually tested in the production of tires in the environment of a large manufacturing company.

This paper focuses on the effect of AlTi3B1 grain refiner on the microstructure and mechanical properties of AlCu4Mg1 alloy. Inoculant in the form of a master alloy with a titanium content of 3 [wt%] and boron content of 1 [wt%] was added to the alloy in various amounts. Boron is completely bound in the insoluble TiB2 phase, which is usually very finely precipitated in the master alloy. The residue of the titanium content is precipitated in the form of polyhedral particles of the melt-soluble intermetallic phase TiAl3. Inoculation of aluminium alloys is performed in order to improve the mechanical and technological properties of the material. In the case of inoculation, this improvement is mainly due to an increase in chemical and structural homogeneity and a decrease in the tendency to segregate individual elements. Optical microscopy was used to observe the microstructure, which evaluated the structure and its changes depending on the content of the inoculant and also the effect of heat treatment. In this experiment, we further focused on the hardness of the AlCu4Mg1 alloy after heat treatment and the addition of various amounts of inoculant. Hardness was evaluated from both a macro and a micro perspective using the Brinell and Vickers method. This is because the microhardness of the alloy can be significantly affected by the occurrence of chemical heterogeneity in the solidified casting.

Paper is interested in the study of basic theoretical knowledge from the problems of preparation of nanoparticles and microparticles and their mechanical synthesis. Also, the possibility of producing of new materials by mechanical alloying of metal powders evaluation of these newly created materials from the point of morphology and surface condition, as well as physical (eg. electrical charge) and chemical (surface treatment).

The paper deals with the problems of nanoparticles and nanomaterials applied in technical practice. The research on the use of nanoparticles has at present a great development. Their potential has a large of use. Particles of nanosize, i.e. below 100 nm exhibit other properties than larger particles and because this area is being explored in all possible sectors. The effect of adding these particles at different mechanical properties in coatings on various surfaces neat (separated on a band saw, milling work, ground roughness 800 and 80 polished) dependent on quality prepared nanoparticles by different conditions of milling. One of the possibilities for an extension of the duty cycle of tyre production molds is applying a protective coating. Due to the functionality of the desktop is needed a very thin coating layer. A suitable type of coating is thus a PTFE coating, which prolongs the service life of hundreds of percent. Better possibility how to improve an extension of the duty cycle is the addition of the coating titanium dioxide particles into the PTFE medium. This is the way how to create nanocomposite directly on the mold surface.