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The Kinetic of Al3Ti Phase Growth in Explosively Welded Multilayered Al/Ti Clads during Annealing under Load Conditions

Petrzak P., Mania I., Paul H., Maj Ł., Gałka A.

Archives of Metallurgy and Materials

2019

Vol. 64, iss. 4

1549--1554

Multilayered composites based on light metals are promising materials in many applications. In the present work the 15-layered clad, composed of alternately stacked of Ti(Gr.1) and AA1050-H24 alloy sheets of 1 mm thick has been investigated with respect to determination of the kinetic of the Al3Ti phase growth. The defect-free multilayered composite was successfully formed by explosive welding technology. Then EXW samples were modified via annealing at the temperature of 600°C in closed die under pressure of 44 MPa for various times ranged between 1 and 10 h. Transmission and Scanning Electron Microscopy examinations were conducted in order to study the kinetic of the elements migration across the interfaces between the layers of the Al/Ti composite. The macro-scale observations of samples after EXW revealed that wavy interfaces were always formed in layers near the explosive charge. The increase of the distance from the top surface leads to flattening of the interface with very thin reaction layer between Al and Ti sheets. During annealing the kinetic of the Al3Ti phase growth is similar near all interfaces and coincides with data from other works. It was found that despite the loading after 10 h of annealing still only small part of Al-sheets undergoes dissolution and the width of the reaction layer does not exceed 5-8 μm.

Influence of Experimental Conditions on Deposition of Silver Nanoparticles Onto Surface of Graphene Oxide

Wojnicki M., Mania I., Marzec M., Gajewska M., Mech K.

Archives of Metallurgy and Materials

2015

Vol. 60, iss. 4

2631--2636

Present work describes the influence of silver nanoparticles precursor form as well as the impact of graphene oxide initial concentration on deposition of the silver nanoparticles onto graphene oxide. Borane dimethylamine complex (DMAB) was used as the reducing agent. It was observed that application of silver ammonia complexes as the silver nanoparticles precursor as well as alkaline solution effect in higher quantity of deposited AgNPs in comparison to deposition process with the use of silver(I) nitrate in acidic solution.

Praca przedstawia wyniki badań nad wpływem wybranych parametrów na proces syntezy i osadzania nanocząstek srebra na powierzchni tlenku grafenu. W badaniach uwzględniono wpływ następujących czynników: stężenie początkowe tlenku grafenu, stężenie początkowe prekursora oraz jego rodzaju. Jako reduktor jonów Ag(I) zastosowano dimetyloamino boran (DMAB). Stwierdzono, iż zastosowanie kompleksu amoniakalnego srebra jako prekursora, jak również zastosowanieśrodowiska alkaicznego skutkuje wyższą efektywnością procesu osadzania AgNPs na powierzchni tlenku grafenu w porównaniu do procesu prowadzonego z zastosowaniem azotanu(V) srebra(I) w środowisku kwaśnym.