A consequence of the Fe/Ni substitution in the Dy(Fe0.4Co0.6)2 compound was studied in the present paper. For this purpose the synthesis and X-ray analysis (295 K) of the Dy(Fe0.4 xNixCo0.6)2 series were performed. The cubic, MgCu2-type, Fd3m crystal structure was observed across the series. 57Fe Mössbauer effect spectra for the series were collected at 77 K. The obtained crystallographic data and the hyperfine interaction parameters are presented. The magnetic hyperfine fields form a separate branch of the Slater-Pauling curve known for the Dy(Mn1 xFex)2 and Dy(Fe1 xCox)2 series. The data are qualitatively related to the Stoner model.
Both 3d subbands in the Dy(Mn0.4Fe0.6)2 compound are filled up only partially with 3d electrons. So, it was interesting to study the consequence of Mn/Al substitution in the Dy(Mn0.4 xAlxFe0.6)2 series. The cubic, MgCu2-type, Fd3m crystal structure was observed across the series. However, for x = 0.35 and 0.40 a stoichiometric admixture of the hexagonal, MgZn2-type, P63/mmc structure was evidenced. Mössbauer effect measurements at 57Fe nuclei were performed at 77 K. The magnetic hyperfine field decreases vs. the aluminium content x. This dependence is related to the possible 3d-electron band structure.
Abstract A consequence of the Fe/Ni substitution in the series of Dy(Fe0.7 xNixCo0.3)2 was studied in the presented paper. The synthesis and X-ray analysis (300 K) of the Dy(Fe0.7 xNixCo0.3)2 system were performed. The cubic, MgCu2-type, Fd3m crystal structure was evidenced for this solid solution. 57Fe Mössbauer effect measurements for the system were carried out at 77 K. The obtained crystallographic lattice parameters and the hyperfine interaction data are presented. The magnetic hyperfine field values form a separate branch of the Slater-Pauling curve situated above the branch corresponding to the Dy(Fe1 xCox)2 intermetallics.
The magnetic hyperfine fields observed at the 57Fe nuclei (77 K) in the Dy(Mn1-xFex)2 and Dy(Fe1-xCox)2 intermetallics form a Slater-Pauling curve. In order to study the effect of cobalt atoms on crystal structure and hyperfine interactions, the new Co/Al substituted series Dy(Fe0.4Co0.6-xAlx)2 was prepared and data of X-ray powder analysis are presented (300 K). From the 57Fe Mössbauer measurements at 77 K the hyperfine parameters were obtained. The magnetic hyperfine fields form a branch of the Slater-Pauling curve.
Przedstawiono wyniki badań tekstur środków grubości blach po wyżarzaniu rekrystalizującym i powierzchni gotowych blach (po nadaniu zgniotu wygładzającego) przy użyciu funkcji rozkładu orientacji ziarn. Zaproponowano metodę obliczania współczynnika anizotropii plastycznej R(a) na podstawie pomiaru tekstur powierzchni i przy wykorzystaniu modelu RC4 teorii Taylora.
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Results of texture testing of sheet gauge centres after recristallization annealing and surfaces of finished sheets (after skin-pass cold work) by using function of distribution of grain orientation are presented. Calculation method of plastic strain ratio R(a) on the basis of texture measurement of surfaces and by making use of RC4 model of Taylor theory was suggested.
Opisano budowę goniometru do wycinania monokryształów i próbek składanych. Przedstawiono zorientowane wycinanie monokryształów wraz z przykładowym wydrukiem komputerowym. Opisano wycinanie próbek składanych.
EN
Construction of goniometer for cutting out single crystals and folding samples is described. Oriented outting out of single crystals together with computer printout is presented. Cutting out of folding samples is described.
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Przeprowadzono rentgenowską, jakościową analizę fazową pyłów atmosferycznych, przy użyciu fotograficznej metody Debyea-Scherrera (D-S). Zasadniczą zaletą geometrii D-S jest możliwość badania bardzo małych ilości materiału (o objętości próbki około 1 mm[3]). Przy rejestracji na filmie uzyskuje się jednocześnie cały obraz dyfrakcyjny. Próbka proszkowa jest w dużym stopniu pozbawiona tekstury. Dla porównania wyników zastosowano również standardową, dyfraktometryczną metodę Bragg-Brentano. Dla potwierdzenia obecności mieszaniny wykrytych faz Fe2O3, Fe3O4 i SiO2 zastosowano metodę Rietvelda. Przy jej użyciu odtworzono dyfraktogramy doświadczalne.
EN
Debye-Scherrer (D-S) geometry with film recording has been used to qualitalivly phase analysis of atmospheric dust. The primary advantages of D-S geometry are that very small sample, volumes (about 1 mm[3]) can be studied. The entire diffraction pattern is collected simultaneously when a film is used. The preffered orientation is greatly reduced by the nature of the powder sample. X-Ray powder patterns were collected also with conventional Bragg-Brentano geometry for comparison of obtained results. The Rietveld methods was used for checking detected mixture of phases, Fe2O3, Fe3O4 and SiO2 by refinement of the whole powder patterns.
In this work the results of the texture investigations in cold deformed sintered powder iron strips made from powder WPL-200 type are presented. Textures of starting materials with different densities were measured. These materials were deformed by rolling in deformation range from 0 to 40%. Weak textures were found in powder iron strips no mater what was their starting density.
Opisano metodę Jettera i współpracowników obliczania odwrot-nych figur biegunowych. Zaproponowano rozwinięcie tej meto-dy pozwalające na wykorzystanie płaskich próbek. Przedstawio-no porównanie obu metod.
EN
Jetter & collaborators method to calculate inverse pole figures is described. Development of this method which allows to use flat samples is suggested. Comparison of both methods is presented.
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