Ústav fyziky materiálů AV ČR, v. v. i. > Zaměstnanci > Friák Martin

Mgr. Martin Friák, Ph.D.

Místnost310a
Telefon+420 532 290 400
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Researcher IDF-9741-2014
Pozicevedoucí - Skupina elektrických a magnetických vlastností


2024

Friák M., Zobač O., Chlup Z., Fikar O., Papež P., Zelený M., Kroupa A.: Materials properties of defect-stabilized off-stoichiometric tau-phase Al2Ge2Mg. Intermetallics 169 (2024) 108294

Huang J., Liu S., Friák M., Qiu C., Shang S., Liu Z., Du Y.: Theory-guided materials design of multiphase alloys with superior stiffness at finite temperatures. Acta Mater. 269 (2024) 119796

Tran N., Friák M., Miháliková I., Kiaba M., Hong N.: Profiles of oxygen and titanium point defects in ferromagnetic TiO2 films. Journal of Physics D: Applied Physics 57 (2024) 265302

Kamarád J., Kastil J., Friák M., Turek I., Kubíčková L., Kaman O., Schneeweiss O., Arnold Z.: Magnetization and exchange-bias effect in powders of the Heusler Ni2MnSn-based alloys. J. Alloys Comp. 976 (2024) 173157

Friák M., Čípek P., Pavlů J., Roupcová P., Miháliková I., Msallamová Š., Michalcová A.: Quantum-mechanical study of internal structural transformations in Pb-supersaturated Pb-Sn alloys. NANOCON 2023 Conference Proceedings 2023 (2024) 15-21

Huang J., Liu S., Friák M., Liu Y., Du Y.: Experimental and theoretical investigation on refining mechanism of Mg2Si by Y addition in the Mg-Al-Si alloys. J. Alloys Comp. 1002 (2024) 175432

Huang J., Liu S., Friák M., Du Y.: First-principles investigation on adsorption poisoning and heterogeneous nucleation mechanisms in Ca modified primary Mg2Si phase. Materials Today Commun. 39 (2024) 108770

Hong N., Friák M., Pazourek P., Pham N., Nhu T., Kiaba M., Gazdová K., Pavlů J.: 2D nature of magnetic states at SnO2 surfaces: a combined experimental and theoretical study. RSC Advances 14 (2024) 13583-13590

Michalcová A., Msallamová Š., Fink D., Kubasek J., Friák M.: The microscopic study of the evolution of the phase transformation in the tin after the indentation of an inoculator. Manufact. Technol. 24 (2024) 83-86

Friák M., Schneeweiss O., Kamarád J., Kastil J., Miroshkina O., Gruner M.: Impact of swaps on Mössbauer characteristics of Ni2MnSn: an experimental and quantum-mechanical study. J. Mater. Sci. 59 (2024) 5595-5606

Ďuriška M., Miháliková I., Friák M.: Quantum-computing study of the electronic structure of crystals: the case study of Si. NANOCON 2023 Conference Proceedings 2023 (2024) 40-45

Friák M., Čípek P., Pavlů J., Zobač O., Roupcová P., Miháliková I., Holec D., Msallamová Š., Michalcová A.: Structure-property relations in Pb-supersaturated metastable Sn-rich Pb-Sn alloys. Metall. Mater. Trans. A 55 (2024) 1867-1877



2023

Friák M., Tran N., Meduňa M., Gazdová K., Pavlů J., Munzar D., Hong N.: Vacancy-induced magnetic states in TiO2 surfaces. J. Appl. Phys. 134 (2023) 013902

Papež P., Zelený M., Friák M., Dlouhý I.: The effect of spin-polarization, atomic ordering and charge transfer on the stability of CoCrNi medium entropy alloy. Mater. Chem. Phys. 304 (2023) 127783

Švábenská E., Roupcová P., Friák M., Schneeweiss O.: Nanoparticles from brake pads wear. Nanocon 2022 Conference proceedings 2022 (2023) 249-254

Gehringer D., Friák M., Holec D.: Models of configurationally-complex alloys made simple. Computer Physics Communications 286 (2023) 108664

Všianská M., Friák M., Šob M.: A critical comparative review of generalized gradient approximation: the ground state of Fe3Al as a test case. Model. Simul. Mater. Sci. Eng. 31 (2023) 085022

Kastil J., Kamarád J., Friák M., Míšek M., Dutta U., Král P., Kaman O., Arnold Z.: Cluster spin glass in off-stoichiometric Ni2.01Mn1.58Sn0.41 alloy. Intermetallics 161 (2023) 107995



2022

Abdoshahi N., Dehghani M., Ruban A., Friák M., Šob M., Spitaler J., Holec D.: On the energetics of the cubic-to-hexagonal transformations in TiAl+Mo alloys. Acta Mater. 240 (2022) 118268

Friák M., Černý M., Šob M.: Temperature-dependent impact of antiphase boundaries on properties of Fe3Al. Intermetallics 151 (2022) 107746

Miroshkina O., Eggert B., Lill J., Beckmann B., Koch D., Hu M., Lojewski T., Rauls S., Schaubel F., Taubel A., Šob M., Ollefs K., Gutfleisch O., Wende H., Gruner M., Friák M.: Impact of magnetic and antisite disorder on the vibrational densities of states in Ni2MnSn Heusler alloys. Phys. Rev. B 106 (2022) 214302

Miháliková I., Friák M., Pivoluska M., Plesch M., Saip M., Šob M.: Best-Practice Aspects of Quantum-Computer Calculations: A Case Study of the Hydrogen Molecule. Molecules 27 (2022) 597

Friák M., Mazalová M., Turek I., Schneeweiss O., Kastil J., Kamarád J., Šob M.: Pressure-Induced Increase of the Total Magnetic Moment in Ferrimagnetic Ni1.9375Mn1.5625Sn0.5 Martensite: A Quantum-Mechanical Study. Mater. Trans. 63 (2022) 430-435

Friák M., Zelený M., Mazalová M., Miháliková I., Turek I., Kastil J., Kamarád J., Míšek M., Arnold Z., Schneeweiss O., Šob M.: The impact of disorder on the 4O-martensite of Ni-Mn-Sn Heusler alloy. Intermetallics 151 (2022) 107708

Friák M., Masničák N., Schneeweiss O., Roupcová P., Michalcová A., Msallamová Š., Šob M.: Multi-methodological study of temperature trends in Mössbauer effect in Sn. Comp. Mater. Sci. 215 (2022) 111780

Miháliková I., Pivoluska M., Plesch M., Friák M., Nagaj D., Šob M.: The Cost of Improving the Precision of the Variational Quantum Eigensolver for Quantum Chemistry. Nanomaterials 12 (2022) 243

Jirásková Y., Pizúrová N., Buršík J., Friák M., Čížek J., Vlasák T., Čegan T., Nikodym M., Luňáček J.: Magneto-structural correlations in Fe-25 at%Al influenced by substitution of Fe by Co and by thermal treatment. J. Alloys Comp. 904 (2022) 163996



2021

Kamarád J., Kastil J., Friák M., Mazalová M., Schneeweiss O., Arnold Z.: Effect of hydrostatic pressure on magneto-crystalline anisotropy of Heusler Ni2MnSn-based alloy. High Pressure Research 41 (2021) 405-413

Friák M., Gracias J., Pavlů J., Šob M.: A quantum-mechanical study of antiphase boundaries in ferromagnetic B2-phase Fe2CoAl alloy. Magnetochemistry 7 (2021) 137

Friák M., Mazalová M., Turek I., Zemanová A., Kastil J., Kamarád J., Míšek M., Arnold Z., Schneeweiss O., Všianská M., Zelený M., Kroupa A., Pavlů J., Šob M.: An Ab Initio Study of Pressure-Induced Changes of Magnetism in Austenitic Stoichiometric Ni2MnSn. Materials 14 (2021) 523

Kamarád J., Kastil J., Friák M., Mazalová M., Schneeweiss O., Míšek M., Kaman O., Arnold Z.: Pressure study of magnetism in off-stoichiometric Ni2MnSn-based alloys. J. Magn. Magn. Mater. 539 (2021) 168345

Friák M., Černý M., Šob M.: The Impact of Vibrational Entropy on the Segregation of Cu to Antiphase Boundaries in Fe3Al. Magnetochemistry 7 (2021) 108

Polsterová S., Všianská M., Friák M., Pizúrová N., Sokovnin S., Šob M.: AB INITIO STUDY OF SILVER NANOPARTICLES, GRAIN BOUNDARIES AND THEIR QUADRUPLE JUNCTIONS. NANOCON 2021 Conference Proceedings 2021 (2021) 344-350

Friák M., Pavlů J., Šob M.: Impact of Disorder on Properties of Vacancies: A Case Study of B2 and A2 Polymorphs of Non-Stoichiometric Fe2CoAl. Crystals 11 (2021) 1207

Wetzel M., Rabending T., Friák M., Všianská M., Šob M., Leineweber A.: Phase Stability of Iron Nitride Fe4N at High Pressure - Pressure-Dependent Evolution of Phase Equilibria in the Fe-N System. Materials 14 (2021) 3963

Šesták P., Friák M., Šob M.: The Effect of Hydrogen on the Stress-Strain Response in Fe3Al: An ab initio Molecular-Dynamics Study. Materials 14 (2021) 4155



2020

Abdoshahi N., Spoerk-Erdely P., Friák M., Mayer S., Šob M., Holec D.: Ab initio study of chemical disorder as an effective stabilizing mechanism of bcc-based TiAl(+Mo). Phys. Rev. Mater. 4 (2020) 103604

Polsterová S., Friák M., Všianská M., Šob M.: Quantum-Mechanical Assessment of the Energetics of Silver Decahedron Nanoparticles. Nanomaterials 10 (2020) 767

Dymáček P., Dobeš F., Jarý M., Jirásková Y., Pizúrová N., Friák M.: Small punch testing of Fe-Al based alloys with Ti and Nb additions. IOP Conf. Ser.: Mater. Sci. Eng. 723 (2020) 012006

Friák M., Lago D., Koutná N., Holec D., Rebok T., Šob M.: Multi-phase ELAStic Aggregates (MELASA) software tool for modeling anisotropic elastic properties of lamellar composites. Computer Physics Communications 247 (2020) 106863

Friák M., Černý M., Všianská M., Šob M.: Impact of antiphase boundaries on structural, magnetic and vibrational properties of Fe3Al. Materials 13 (2020) 4884

Koutná N., Hahn R., Zálešák J., Friák M., Bartosik M., Keckes J., Šob M., Mayrhofer P., Holec D.: Point-defect engineering of MoN/TaN superlattice films: A first-principles and experimental study. Mater. & Design 186 (2020) 108211

Dobeš F., Dymáček P., Friák M.: Creep of Heusler-type alloy Fe-25Al-25Co. Crystals 10 (2020) 52

Friák M., Golian M., Holec D., Koutná N., Šob M.: An ab initio study of magnetism in disordered Fe-Al alloys with thermal antiphase boundaries. Nanomaterials 10 (2020) 44

Jirásková Y., Pizúrová N., Friák M., Janičkovič D.: Structural and Magnetic Study of Fe-Al20-(Ti, Nb) Alloys. Acta Phys. Pol. A 137 (2020) 835-838



2019

Kotoul M., Skalka P., Profant T., Friák M., Řehák P., Šesták P., Černý M., Pokluda J.: Ab initio aided strain gradient elasticity theory in prediction of nanocomponent fracture. Mech. Mater. 136 (2019) 103074

Meng F., Všianská M., Friák M., Šob M.: Surface-induced magnetism in intermetallics: Ni3Ge compound as a case study. J. Magn. Magn. Mater. 474 (2019) 273-281

Dymáček P., Dobeš F., Jirásková Y., Pizúrová N., Friák M.: Tensile, creep and fracture testing of prospective Fe-Al-based alloys using miniature specimens. Theor. Appl. Fract. Mech. 99 (2019) 18-26

Dobeš F., Dymáček P., Friák M.: The Influence of Niobium Additions on Creep Resistance of Fe-27 at. % Al Alloys. Metals 9 (2019) 739

Meng F., Zhen Y., Všianská M., Friák M., Šob M.: Theoretical investigations on structural, elastic, thermodynamic and electronic properties of Al3Ti and Al3V compounds in L12 structure under high pressure. Mat. Res. Express 6 (2019) 056536

Miháliková I., Friák M., Koutná N., Holec D., Šob M.: An Ab Initio Study of Vacancies in Disordered Magnetic Systems: A Case Study of Fe-Rich Fe-Al Phases. Materials 12 (2019) 1430

Rao Z., Ponge D., Koermann F., Ikeda Y., Schneeweiss O., Friák M., Neugebauer J., Raabe D., Li Z.: Invar effects in FeNiCo medium entropy alloys: From an Invar treasure map to alloy design. Intermetallics 111 (2019) 106520

Friák M., Všianská M., Šob M.: A quantum-mechanical study of clean and Cr-segregated antiphase boundaries in Fe3Al. Materials 12 (2019) 3954

Friák M., Buršíková V., Pizúrová N., Pavlů J., Jirásková Y., Homola V., Miháliková I., Slávik A., Holec D., Všianská M., Koutná N., Fikar J., Janičkovič D., Šob M., Neugebauer J.: Elasticity of Phases in Fe-Al-Ti Superalloys: Impact of Atomic Order and Anti-Phase Boundaries. Crystals 9 (2019) 299

Koutná N., Řehák P., Chen Z., Bartosik M., Fallmann M., Černý M., Zhang Z., Friák M., Šob M., Mayrhofer P., Holec D.: Correlating structural and mechanical properties of AlN/TiN superlattice films. Scr. Mater. 165 (2019) 159-163

Kamarád J., Friák M., Kastil J., Schneeweiss O., Šob M., Dlouhý A.: Effect of high pressure on magnetic properties of CrMnFeCoNi high entropy alloy. J. Magn. Magn. Mater. 487 (2019) 165333



2018

Jirásková Y., Pizúrová N., Titov A., Janičkovič D., Friák M.: Phase separation in Fe-Ti-Al alloy - Structural, magnetic, and Mossbauer study. J. Magn. Magn. Mater. 468 (2018) 91-99

Friák M., Slávik A., Miháliková I., Holec D., Všianská M., Šob M., Palm M., Neugebauer J.: Origin of the low magnetic moment in Fe2AlTi: An ab initio study. Materials 11 (2018) 1732

Dobeš F., Dymáček P., Friák M.: Force-to-Stress Conversion Methods in Small Punch Testing Exemplified by Creep Results of Fe-Al Alloy with Chromium and Cerium Additions. IOP Conf. Ser.: Mater. Sci. Eng. 461 (2018) 012017

Friák M., Zelený M., Všianská M., Holec D., Šob M.: An Ab Initio Study of Connections between Tensorial Elastic Properties and Chemical Bonds in Sigma5(210) Grain Boundaries in Ni3Si. Materials 11 (2018) 2263

Friák M., Kroupa P., Holec D., Šob M.: An Ab Initio Study of Pressure-Induced Reversal of Elastically Stiff and Soft Directions in YN and ScN and Its Effect in Nanocomposites Containing These Nitrides. Nanomaterials 8 (2018) 1049

Friák M., Holec D., Šob M.: Quantum-Mechanical Study of Nanocomposites with Low and Ultra-Low Interface Energies. Nanomaterials 8 (2018) 1057

Friák M., Holec D., Šob M.: An ab initio study of mechanical and dynamical stability of MoSi2. J. Alloys Comp. 746 (2018) 720-728

Friák M., Oweisová S., Pavlů J., Holec D., Šob M.: An ab initio study of thermodynamic and mechanical stability of Heusler-based Fe2AlCo polymorphs. Materials 11 (2018) 1543

Buršíková V., Homola V., Jirásková Y., Pizúrová N., Miháliková I., Friák M., Koutná N., Slávik A., Holec D., Šob M.: Study of Local Mechanical Properties of Fe78Al22 Alloy. Key Eng. Mater. 784 (2018) 27-32

Dobeš F., Dymáček P., Friák M.: Small punch creep of Fe-Al-Cr alloy with Ce addition and its relation to uniaxial creep tests. Kovové materiály 56 (2018) 205-212

Šesták P., Friák M., Holec D., Všianská M., Šob M.: Strength and Brittleness of Interfaces in Fe-Al Superalloy Nanocomposites under Multiaxial Loading: An ab initio and Atomistic Study. Nanomaterials 8 (2018) 873

Koutná N., Holec D., Friák M., Mayrhofer P., Šob M.: Stability and elasticity of metastable solid solutions and superlattices in the MoN-TaN system: First-principles calculations. Mater. & Design 144 (2018) 310-322

Miháliková I., Friák M., Jirásková Y., Holec D., Koutná N., Šob M.: Impact of Nano-Scale Distribution of Atoms on Electronic and Magnetic Properties of Phases in Fe-Al Nanocomposites: An Ab Initio Study. Nanomaterials 8 (2018) 1059



2017

Holec D., Zhou L., Riedl H., Koller C., Mayrhofer P., Friák M., Šob M., Koermann F., Neugebauer J., Music D.: Atomistic modeling-based design of novel materials. Adv. Eng. Mater. 19 (2017) 1600688

Friák M., Všianská M., Holec D., Zelený M., Šob M.: Tensorial elastic properties and stability of interface states associated with Sigma5(210) grain boundaries in Ni3(Al,Si). Sci. Technol. Adv. Mater. 18 (2017) 273-282

Schneeweiss O., Friák M., Dudová M., Holec D., Šob M., Kriegner D., Holý V., Beran P., George E., Neugebauer J., Dlouhý A.: Magnetic properties of the CrMnFeCoNi high-entropy alloy. Phys. Rev. B 96 (2017) 014437

Friák M., Všianská M., Holec D., Šob M.: Quantum-mechanical study of tensorial elastic and high-temperature thermodynamic properties of grain boundary states in superalloy-phase Ni3Al. IOP Conf. Ser.: Mater. Sci. Eng. 219 (2017) 012019

Pei Z., Zhang X., Hickel T., Friák M., Sandloebes S., Dutta B., Neugebauer J.: Atomic structures of twin boundaries in hexagonal close-packed metallic crystals with particular focus on Mg. npj Comp. Mater. 3 (2017) 1-6

Dey P., Nazarov R., Dutta B., Yao M., Herbig M., Friák M., Hickel T., Raabe D., Neugebauer J.: Ab initio explanation of disorder and off-stoichiometry in Fe-Mn-Al-C kappa-carbides. Phys. Rev. B 95 (2017) 104108

Sandloebes S., Friák M., Korte-Kerzel S., Pei Z., Neugebauer J., Raabe D.: A rare-earth free magnesium alloy with improved intrinsic ductility. Sci. Rep. 7 (2017) 10458



2016

Střelcová Z., Kulhánek P., Friák M., Fabritius H., Petrov M., Neugebauer J., Koča J.: The structure and dynamics of chitin nanofibrils. RSC Advances 6 (2016) 30710-30721

Hüter C., Friák M., Weikamp M., Neugebauer J., Goldenfeld N., Svendsen B., Spatschek R.: Nonlinear elastic effects in phase field crystal simulations. Phys. Rev. B 93 (2016) 214105

Fabritius H., Ziegler A., Friák M., Nikolov S., Huber J., Seidl B., Ruangchai S., Alagboso F., Karsten S., Lu J., Janus A., Petrov M., Zhu L., Hemzalová P., Hild S., Raabe D., Neugebauer J.: Functional adaptation of crustacean exoskeletal elements. Bioinspir. & Biomim. 11 (2016) 055006



2015

Ma D., Friák M., Pezold J., Neugebauer J., Raabe D.: Ab initio study of compositional trends in solid solution strengthening in metals with low Peierls stresses. Acta Mater. 98 (2015) 367-376

Friák M., Tytko D., Holec D., Choi P., Eisenlohr P., Raabe D., Neugebauer J.: Synergy of atom-probe structural data and quantum-mechanical calculations in a theory-guided design of extreme-stiffness superlattices containing metastable phases. New J. Phys. 17 (2015) 093004

Herz A., Friák M., Rossberg D., Hentschel M., Theska F., Wang D., Holec D., Šob M., Schneeweiss O., Schaaf P.: Facet-controlled phase separation in supersaturated Au-Ni nanoparticles upon shape equilibration. Appl. Phys. Lett. 107 (2015) 073109

Pei Z., Ma D., Friák M., Svendsen B., Raabe D., Neugebauer J.: From generalized stacking fault energies to dislocation properties: Five-energy-point approach and solid solution effects in magnesium. Phys. Rev. B 92 (2015) 064107

Pei Z., Friák M., Sandlöbes S., Nazarov R., Svendsen B., Raabe D., Neugebauer J.: Rapid theory-guided prototyping of ductile Mg alloys: from binary to multi-component materials. New J. Phys. 7 (2015) 093009

Ma D., Friák M., Pezold J., Raabe D., Neugebauer J.: Computationally efficient and quantitatively accurate multiscale simulation of solid-solution strengthening by ab initio calculation. Acta Mater. 85 (2015) 53-66



2014

Holec D., Tasnadi F., Wagner P., Friák M., Neugebauer J., Mayrhofer P., Keckes J.: Macroscopic elastic properties of textured ZrN-AlN polycrystalline aggregates: From ab initio calculations to grain-scale interactions. Phys. Rev. B 90 (2014) 184106

Haghighat H., Pezold J., Race C., Koermann F., Friák M., Neugebauer J., Raabe D.: Influence of the dislocation core on the glide of the 1/2{110} edge dislocation in bcc-iron. Comp. Mater. Sci. 87 (2014) 274-282

Friák M., Zhu L., Lymperakis L., Titrian H., Aydin U., Janus A., Fabritius H., Ziegler A., Nikolov S., Hemzalová P., Raabe D., Neugebauer J.: Quantum-mechanical study of single-crystalline and polycrystalline elastic properties of Mg-substituted calcite crystals. Key Eng. Mater. 592-593 (2014) 335-341

Holec D., Friák M., Dlouhý A., Neugebauer J.: Ab initio study of point defects in NiTi-based alloys. Phys. Rev. B 89 (2014) 014110

Sandlöbes S., Pei Z., Friák M., Zhu L., Wang F., Zaefferer S., Raabe D., Neugebauer J.: Ductility improvement of Mg alloys by solid solution: Ab initio modeling, synthesis and mechanical properties. Acta Mater. 70 (2014) 92-104



2013

Ma D., Friák M., Pezold J., Raabe D., Neugebauer J.: Ab initio identified designing principles of solid solution strengthening in Al. Sci. Technol. Adv. Mater. 14 (2013) 025001

Zhu L., Friák M., Lymperakis L., Titrian H., Aydin U., Janus A., Fabritius H., Ziegler A., Nikolov S., Hemzalová P., Raabe D., Neugebauer J.: Ab initio study of single-crystalline and polycrystalline elastic properties of Mg-substituted calcite crystals. J. Mech. Behav. Biomed. Mater. 20 (2013) 296-304

Sandlöbes S., Friák M., Neugebauer J., Raabe D.: Basal and non-basal dislocation slip in Mg-Y. Mater. Sci. Eng. A 576 (2013) 61-68

Petrov M., Lymperakis L., Friák M., Neugebauer J.: Ab initio based conformational study of the crystalline alpha-chitin. Biopolymers 99 (2013) 22-34

Pei Z., Zhu L., Friák M., Sandloebes S., Pezold J., Sheng H., Race C., Zaefferer S., Svendsen B., Raabe D., Neugebauer J.: Ab initio and atomistic study of generalized stacking fault energies in Mg and Mg-Y alloys. New J. Phys. 15 (2013) 043020

Hemzalová P., Friák M., Šob M., Ma D., Udyansky A., Raabe D., Neugebauer J.: Ab initio study of thermodynamic, electronic, magnetic, structural, and elastic properties of Ni4N allotropes. Phys. Rev. B 88 (2013) 174103



2011

Friák M., Hickel T., Körmann F., Udyansky A., Dick A., Pezold J., Ma D., Kim O., Counts W., Šob M., Gebhardt T., Music D., Schneider J., Raabe D., Neugebauer J.: Determining the elasticity of materials employing quantum-mechanical approaches: From the electronic ground state to the limits of materials stability. Steel Res. Int. 82 (2011) 88-100

Holec D., Friák M., Dlouhý A., Neugebauer J.: Ab initio study of pressure stabilized NiTi allotropes: Pressure-induced transformations and hysteresis loops. Phys. Rev. B 84 (2011) 224119

Zelený M., Friák M., Šob M.: Ab initio study of energetics and magnetism of Fe, Co, and Ni along the trigonal deformation path. Phys. Rev. B 83 (2011) 184424


ČísloNázev
22-05801S Příčiny a mechanismus degradace slitin cínu s nízkým obsahem legujících prvků
20-16130S Multifunkční vlastnosti práškovaných intermetalických slitin Ni-Mn-Sn
8J18AT008 Teorií vedený vývoj nových supermřížkových nanokompozitů
17-22139S Teorií vedený vývoj nových superslitin na bázi Fe-Al