Temat: SEM microstructures - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The Technology and Structural Properties of Special Glass Modified (Ba0.6Pb0.4)TiO3 Ceramics
Autorzy:: Wodecka-Dus, B.
Adamczyk, M.
Goryczka, T.
Dzik, J.
Radoszewska, D.
Kozielski, L.
Bochenek, D.
Powiązania:: https://bibliotekanauki.pl/articles/351884.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: (BaxPb1−x)TiO3 ceramics
special glasses
SEM microstructures
XRD measurements
Opis:: The present paper widely describes the details of technology of (Ba_0.6Pb_0.4)TiO₃ ceramics modified with PbO-B₂O₃-Al₂O₃-WO₃ special glass, as well as the influence of admixture on the microstructure and crystal structure of basic material. The microstructure investigations reveal the significant increase of grain size and a decrease of pores participation in volume of modified samples, whereas the X-Ray Diffraction (XRD) measurements show a decrease of the volume of unit cell. The obtained results are discussed due to processes occurring during the sintering process at high temperature.
Źródło:: Archives of Metallurgy and Materials; 2016, 61, 4; 1761-1766
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Relationships between microstructural features and mesoscopic fracture density in a Pleistocene till (Konin area, central Poland)
Autorzy:: Włodarski, Wojciech
Powiązania:: https://bibliotekanauki.pl/articles/94640.pdf
Data publikacji:: 2010
Wydawca:: Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:: till
shear fracture
microstructures
SEM
rheology
gliny
mikrostruktury
reologia
Opis:: The qualitative and quantitative characteristics of microstructures in a till were analysed with SEM; it was also investigated whether the results depend on the till’s mesostructural characteristics. The till, exposed in a few open-cast browncoal mines near Konin in central Poland, is cut by numerous fractures which correspond to Riedel shear patterns, P-type structures and C-S type foliations. The fractures developed as a result of simple shearing induced by movement of the base of the Odranian ice sheet. On the basis of fracture density, two till types are distinguished: coarsely-brecciated till (wide spacing of fractures) and finely-brecciated till (closely spaced fractures). It is found that the fracture density is reflected in the microstructure of the till. The finely-brecciated till is characterised by a high porosity and has predominantly anisometric and fissure-like pores that also show a more clearly preferred orientation than the pores in the coarsely-brecciated till. In contrast, the coarsely-brecciated till has anisometric pores that show a less preferential orientation. The porosity of the coarsely-brecciated till is lower than in the finely-brecciated till. The finely-brecciated till probably represents a strongly deformed deposit, related in some cases to zones developed along thrusts that cut the till. Positive correlation between the porosity, the spatial arrangement of pores, and the density of fractures suggests a synsedimentary origin of the shear strain. This strain was accommodated by a particulate flow developed within both wide, pervasive zones and narrow, localised zones. The hydraulic conditions within the subglacial shear zone controlled rheological differences within the till during deformation and thus influenced the degree of the microstructure alteration.
Źródło:: Geologos; 2010, 16, 1; 3-26
1426-8981
2080-6574
Pojawia się w:: Geologos
Dostawca treści:: Biblioteka Nauki

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