Zobrazeno 1 - 10
of 98
pro vyhledávání: '"Lukasz Hawelek"'
Autor:
Mateusz Ciszewski, Karolina Pianowska, Joanna Malarz, Katarzyna Leszczyńska-Sejda, Lukasz Hawelek
Publikováno v:
Crystals, Vol 14, Iss 7, p 627 (2024)
A mechanically homogenized composite of expanded graphite and cobalt(II) perrhenate has been described. Cobalt(II) perrhenate was obtained in a reaction of perrhenic acid with cobalt(II) nitrate. A simple mortar homogenization method was used to enha
Externí odkaz:
https://doaj.org/article/7facade42df24c6a839024232224bc16
Publikováno v:
Materials, Vol 16, Iss 18, p 6288 (2023)
The importance of amorphous and nanocrystalline Fe-based soft magnetic materials is increasing annually. Thus, characterisation of the chemical compositions, alloying additives, and crystal structures is significant for obtaining the appropriate func
Externí odkaz:
https://doaj.org/article/6a77492f1bb64f9586701b13d4a79cb8
Autor:
Mateusz Polis, Konrad Szydło, Roman Zakusylo, Lukasz Hawelek, Agnieszka Stolarczyk, Tomasz Jarosz
Publikováno v:
Molecules, Vol 28, Iss 15, p 5741 (2023)
This work aims to investigate the combustion mechanism for a pyrotechnic delay composition (PDC), consisting of zinc powder as a fuel and KMnO4 as an oxidising agent. For this purpose, the compositions were thermally conditioned at several set temper
Externí odkaz:
https://doaj.org/article/c691619d166e4ba89a9049bd0b0e30dd
Autor:
Lukasz Hawelek, Tymon Warski, Adrian Radon, Adam Pilsniak, Wojciech Maziarz, Maciej Szlezynger, Mariola Kadziolka-Gawel, Aleksandra Kolano-Burian
Publikováno v:
Materials, Vol 14, Iss 24, p 7807 (2021)
In this work, based on the thermodynamic prediction, the comprehensive studies of the influence of Cu for Fe substitution on the crystal structure and magnetic properties of the rapidly quenched Fe85B15 alloy in the ribbon form are performed. Using t
Externí odkaz:
https://doaj.org/article/d855a6756d0442ee9e50a8df4fb63cd5
Autor:
Aleksandra Kolano-Burian, Przemyslaw Zackiewicz, Agnieszka Grabias, Anna Wojcik, Wojciech Maziarz, Maciej Szlezynger, Patryk Wlodarczyk, Maciej Kowalczyk, Lukasz Hawelek
Publikováno v:
Materials, Vol 14, Iss 12, p 3433 (2021)
In the present work, we investigated in detail the thermal/crystallization behavior and magnetic properties of materials with Fe84.5-xCoxNb5B8.5P2 (x = 0, 5, 10, 15 and 20 at.%) composition. The amorphous ribbons were manufactured on a semi-industria
Externí odkaz:
https://doaj.org/article/41a518675bdb4fecbc822c8b4205d4d8
Autor:
Tymon Warski, Adrian Radon, Przemyslaw Zackiewicz, Patryk Wlodarczyk, Marcin Polak, Anna Wojcik, Wojciech Maziarz, Aleksandra Kolano-Burian, Lukasz Hawelek
Publikováno v:
Materials, Vol 14, Iss 4, p 726 (2021)
The effect of substitution of Fe by Cu on the crystal structure and magnetic properties of Fe72−xNi8Nb4CuxSi2B14 alloys (x = 0.6, 1.1, 1.6 at.%) in the form of ribbons was investigated. The chemical composition of the materials was established on t
Externí odkaz:
https://doaj.org/article/98a2ff09bc2b473c935026fe181b855d
Autor:
Lukasz Hawelek, Tymon Warski, Patryk Wlodarczyk, Marcin Polak, Przemyslaw Zackiewicz, Wojciech Maziarz, Anna Wojcik, Magdalena Steczkowska-Kempka, Aleksandra Kolano-Burian
Publikováno v:
Materials, Vol 14, Iss 1, p 5 (2020)
The complex structural and magnetic studies of the annealed rapidly quenched Cu-free Fe72Ni8Nb4Si2B14 alloy (metallic ribbons form) are reported here. Based on the calorimetric results, the conventional heat treatment process (with heating rate 10 °
Externí odkaz:
https://doaj.org/article/bc2d7d3e2c2f4b8c928a87ae62091897
Autor:
Anna Wojcik, Wojciech Maziarz, Maciej Kowalczyk, Robert Chulist, Maciej Szlezynger, Pawel Czaja, Lukasz Hawelek, Przemyslaw Zackiewicz, Patryk Wlodarczyk, Aleksandra Kolano-Burian
Publikováno v:
Materials, Vol 13, Iss 7, p 1639 (2020)
In this work, a detailed microstructural investigation of as-melt-spun and heat-treated Fe67Co20B13 ribbons was performed. The as-melt-spun ribbon was predominantly amorphous at room temperature. Subsequent heating demonstrated an amorphous to crysta
Externí odkaz:
https://doaj.org/article/ca64ba1dea754160a2e2fe693a373627
Autor:
Tymon Warski, Patryk Wlodarczyk, Marcin Polak, Przemyslaw Zackiewicz, Adrian Radon, Anna Wojcik, Maciej Szlezynger, Aleksandra Kolano-Burian, Lukasz Hawelek
Publikováno v:
Materials, Vol 13, Iss 6, p 1451 (2020)
Influence of Cu content on thermodynamic parameters (configurational entropy, Gibbs free energy of mixing, Gibbs free energy of amorphous phase formation), crystallization kinetics, structure and magnetic properties of Fe86-xCuxB14 (x = 0, 0.4, 0.55,
Externí odkaz:
https://doaj.org/article/7faba0f02ce04374b983c8b3ac67a676
Autor:
Lukasz Hawelek, Tymon Warski, Patryk Wlodarczyk, Marcin Polak, Przemyslaw Zackiewicz, Adrian Radon, Anna Wojcik, Aleksandra Kolano-Burian
Publikováno v:
Materials, Vol 13, Iss 4, p 919 (2020)
The effects of Co for Fe substitution on magnetic properties, thermal stability and crystal structure of Fe85.45−xCoxCu0.55B14 (x = 0, 2.5, 5, 7.5, 10) melt spun amorphous alloys were investigated. The Cu content was firstly optimized to minimize t
Externí odkaz:
https://doaj.org/article/848597306f6b49e1adb3bf731eead3c6