Partner: Łukasz Rogal

Institute of Metallurgy and Materials Science, Polish Academy of Sciences (PL)

Recent publications
1.Kalita D., Mulewska K., Jóźwik I., Zaborowska A., Gawęda M., Chromiński W., Bochenek K., Rogal Ł., Metastable β-Phase Ti–Nb Alloys Fabricated by Powder Metallurgy: Effect of Nb on Superelasticity and Deformation Behavior, METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, ISSN: 1073-5623, DOI: 10.1007/s11661-023-07285-5, pp.1-17, 2024
Abstract:

This study investigates the effect of Nb concentration on the mechanical properties, superelasticity, as well as deformation behavior of metastable β-phase Ti–Nb alloys produced via powder metallurgy. The alloys were fabricated through mechanical alloying, followed by consolidation using hot pressing. The resulting microstructure comprises fine β-phase grains with TiC carbide precipitates at the grain boundaries. The study reveals non-linear variations in the values of yield strength for the manufactured materials, which were attributed to the occurrence of various deformation mechanisms activated during the loading. It was found that the mechanisms change with the increasing concentration of Nb in the manner: stress-induced martensitic transformation, twinning, slip. However, all these mechanisms were activated at a reduced concentration of Nb compared to the materials obtained by casting technology previously reported in the literature. This is most probably associated with the elevated oxygen content, which affects the stability of the parent β-phase. The study revealed that superelasticity in Ti–Nb-based alloys prepared using powder metallurgy may be achieved by reducing the content of β-stabilizing elements compared to alloys obtained by conventional technologies. In this study, the Ti–14Nb (at. pct) alloy exhibited the best superelasticity, whereas conventionally fabricated Ti–Nb alloys displayed superelasticity at an Nb concentration of approximately 26 at. pct. The developed material exhibited a non-conventional, one-stage yielding behavior, resulting in a superelastic response at significantly higher stresses compared to conventionally fabricated Ti–Nb alloys.

Affiliations:
Kalita D.-other affiliation
Mulewska K.-National Centre for Nuclear Research (PL)
Jóźwik I.-Institute of Electronic Materials Technology (PL)
Zaborowska A.-other affiliation
Gawęda M.-other affiliation
Chromiński W.-other affiliation
Bochenek K.-IPPT PAN
Rogal Ł.-Institute of Metallurgy and Materials Science, Polish Academy of Sciences (PL)
2.Manippady S., Michalska M., Krajewski M., Bochenek K., Basista M.A., Zaszczyńska A., Czeppe T., Rogal , Jain A., One-step synthesis of a sustainable carbon material for high performance supercapacitor and dye adsorption applications, Materials Science and Engineering: B, ISSN: 0921-5107, DOI: 10.1016/j.mseb.2023.116766, Vol.297, No.116766, pp.1-14, 2023
Abstract:

The sustainable transformation of bio-waste into usable, material has gained great scientific interest. In this paper, we have presented preparation of an activated carbon material from a natural mushroom (Suillus boletus) and explor its properties for supercapacitor and dye adsorption applications. The produced cell exhibited a single electrode capacitance of ∼247 F g−1 with the energy and power density of ∼35 Wh kg−1 and 1.3 kW kg−1, respectively. The cell worked well for ∼20,000 cycles with ∼30% initial declination in capacitance. Three cells connected in series glowed a 2.0 V LED for ∼1.5 min. Moreover, ultrafast adsorption of methylene blue dye onto the prepared carbon as an adsorbent was recorded with ∼100% removal efficiency in an equilibrium time of three minutes. The performed tests indicate that the mushroom-derived activated carbon has the potential to become a high-performance electrode material for supercapacitors and an adsorbent for real-time wastewater treatment applications.

Keywords:

Activated carbon, Amorphous material, Biomass, Polymer gel electrolyte, Supercapacitor, Dye adsorption

Affiliations:
Manippady S.-IPPT PAN
Michalska M.-Łukasiewicz Research Network‒Institute of Electronic Materials Technology (PL)
Krajewski M.-IPPT PAN
Bochenek K.-IPPT PAN
Basista M.A.-IPPT PAN
Zaszczyńska A.-IPPT PAN
Czeppe T.-Institute of Metallurgy and Materials Science, Polish Academy of Sciences (PL)
Rogal -Institute of Metallurgy and Materials Science, Polish Academy of Sciences (PL)
Jain A.-IPPT PAN
3.Maj J., Węglewski W., Bochenek K., Rogal Ł., Woźniacka S., Basista M., A comparative study of mechanical properties, thermal conductivity, residual stresses, and wear resistance of aluminum-alumina composites obtained by squeeze casting and powder metallurgy, METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, ISSN: 1073-5623, DOI: 10.1007/s11661-021-06401-7, pp.1-10, 2021
Abstract:

Squeeze casting and powder metallurgy techniques were employed to fabricate AlSi12/Al2O3 composites, which are lightweight structural materials with potential applications in the automotive industry. The impact of the processing route on the material properties was studied. Comparative analyses were conducted for the Vickers hardness, flexural strength, fracture toughness, thermal conductivity, thermal residual stresses, and frictional wear. Our results show that the squeeze cast composite exhibits superior properties to those obtained using powder metallurgy.

Affiliations:
Maj J.-IPPT PAN
Węglewski W.-IPPT PAN
Bochenek K.-IPPT PAN
Rogal Ł.-Institute of Metallurgy and Materials Science, Polish Academy of Sciences (PL)
Woźniacka S.-IPPT PAN
Basista M.-IPPT PAN