Autor: Molnar, S. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Geopolymerisation of Mechanically Activated Lignite and Brown Coal Fly Ash
Autorzy:: Mucsi, G.
Molnár, Z.
Kumar, S.
Powiązania:: https://bibliotekanauki.pl/articles/1375557.pdf
Data publikacji:: 2014-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 81.20.Wk
Opis:: Geopolymers have been synthesized from mechanically activated lignite and brown coal fly ash. Mechanical activation of fly ash has been carried out using laboratory ball mill. To determine the structural changes in both, the fly ash and the resulted geopolymer, Fourier transform infrared spectroscopy measurements were performed. Isothermal conduction calorimetry method was applied to study the geopolymerisation reactions in mechanically non-activated (raw) and activated fly ash samples. The isothermal conduction calorimetry results showed similar peak intensity for mechanically activated (5-30 min) fly ash samples. However, the intensity of peak for 120 min milled brown coal fly ash was the highest. The compressive strength of the specimen was found to be dependent on the grinding residence time as well as composition/type of fly ash.
Źródło:: Acta Physica Polonica A; 2014, 126, 4; 994-998
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Martensitic Transformation in Co-Based Ferromagnetic Shape Memory Alloy
Autorzy:: Kopeček, J.
Yokaichiya, F.
Laufek, F.
Jarošová, M.
Jurek, K.
Drahokoupil, J.
Sedláková-Ignácová, S.
Molnár, P.
Heczko, O.
Powiązania:: https://bibliotekanauki.pl/articles/1418445.pdf
Data publikacji:: 2012-09
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.40.Kc
61.05.fm
81.30.Kf
81.40.Ef
Opis:: The $Co_{38}Ni_{33}Al_{29}$ alloy in both powder and bulk state was investigated in the presented study using neutron diffraction on E9 high resolution powder diffractometer at HZB (BER II). The reverse martensitic phase transformation from the tetragonal martensitic phase into the cubic austenitic phase was observed with the phase coexistence within the temperatures from 183 K to 133 K. The fcc cobalt solid solution particles distributed in the transforming matrix remained in the same state through the whole temperature range. The obtained results agree with magnetization measurements on the same annealed sample. The powder data are compared with experiments on bulk sample, although there was a texture present. The obtained results provide further information about the phase transition process in this important class of ferromagnetic shape memory alloys.
Źródło:: Acta Physica Polonica A; 2012, 122, 3; 475-477
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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