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    Wyświetlanie 1-5 z 5
    Tytuł:
    Lattice Parameters of Aluminium Nitride in the Range 10-291 K
    Autorzy:
    Paszkowicz, W.
    Knapp, M.
    Podsiadło, S.
    Kamler, G.
    Pełka, J. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/2030706.pdf
    Data publikacji:
    2002-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Je
    65.40.De
    65.60.+a
    65.40.-b
    Opis:
    Lattice parameters for aluminium nitride were determined using X-ray powder diffraction at a synchrotron radiation source (beamline B2, Hasylab/DESY, Hamburg) in the temperature range from 10 K to 291 K. The measurements were carried out using the Debye-Scherrer geometry. The relative change of both, a and c, on rising the temperature in the studied range (10-291 K) is about 0.03%. The results are compared with earlier laboratory data and theoretical predictions.
    Źródło:
    Acta Physica Polonica A; 2002, 101, 5; 781-785
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ferroelastic Phase Transition in a Layered Bismuth Oxychloride Single Crystals
    Autorzy:
    Bunda, V.
    Bunda, S.
    Vashchuk, F.
    Feher, A.
    Kajňaková, M.
    Kováč, J.
    Syrkin, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1535538.pdf
    Data publikacji:
    2010-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    64.70.K-
    81.30.-t
    65.40.-b
    Opis:
    We report the results of low-temperature specific-heat, magnetization, and X-ray diffraction measurements on a bismuth oxyhalide (BiOCl) single crystal. We conclude that BiOCl in temperature region 150-230 K shows "antiferroelastic-paraelectric" phase transitions at critical temperatures $T_{c1}$ = 167.5 K and $T_{c2}$ = 214.6 K, respectively.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 5; 1069-1070
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of deformation on the transformation temperatures of martensite and bainite structures in Cu-9.97%Al-4.62%Mn alloy
    Autorzy:
    Aldirmaz, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1075528.pdf
    Data publikacji:
    2016-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.66.Dk
    68.37.Hk
    81.30.Kf
    81.30.Mh
    62.20.-x
    65.40.-b
    Opis:
    At present study of Cu-9.97%Al-4.62%Mn alloy system is used. Some physical properties of martensitic and bainite phase transformatios in Cu-9.97%Al-4.62%Mn (wt%) alloy were investigated by means of scanning electron microscopy and differential scanning calorimetry. In scanning electron microscope observations of Cu-9.97%Al-4.62%Mn alloy were noted two kinds of martensitic phases. These phases were defined as β'₁ (M18R) and γ'₁ (2H) martensites structures. According to differential scanning calorimetry measurement results, the deformation induced temperature is expected to be higher than the thermally induced temperature in Cu-9.97%Al-4.62%Mn alloy for martensite and bainite structures.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 1; 40-42
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Macroscopic and Microscopic Descriptions of the Plastic Deformation of Fcc Metals over a Wide Range of Strain and Temperature
    Autorzy:
    Csanádi, T.
    Chinh, N.
    Gubicza, J.
    Langdon, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1419113.pdf
    Data publikacji:
    2012-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.66.Bi
    83.50.Uv
    65.40.-b
    81.40.Jj
    61.72.Cc
    Opis:
    The plastic behavior of face-centered cubic metals was investigated over a wide range of strain and testing temperature. The experimental stress-strain data were described using both macroscopic and microscopic, well-established relationships. The characteristics of these descriptions are discussed and compared with each other. The analysis of the characteristics leads to a definition of the low and high temperature deformation regions, where the kinetics of both the dislocation-multiplication and the dislocation-annihilation (recovery) are different. For pure aluminum, it is shown that the boundary between these two regions occurs at a homologous temperature of the order of $\approx 0.5 T_{m}$ where $T_{m}$ is the absolute melting temperature. From this analysis, correlations are also drawn between the macroscopic parameters describing the stress-strain relationship and the fundamental characteristics of the microscopic processes both at room temperature and elevated temperatures.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 3; 630-633
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Novel Route to Prepare Magnetic Material $Co_3V_2O_8$ and Structural Characterization
    Autorzy:
    Celik, G.
    Kurtulus, F.
    Guler, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1491310.pdf
    Data publikacji:
    2012-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    07.85.-m
    32.30.Rj
    33.20.Ea
    61.43.Gt
    61.66.Fn
    65.40.-b
    75.47.Lx
    81.40.Gh
    82.33.Pt
    84.40.-x
    Opis:
    $Co_3V_2O_8$ is a member of kagomé staircase oxides, represented by general formula $M_3V_2O_8$ (M = Ni, Co, Mn). It attracted great attention due to strong magnetic anisotropy, magnetic phase transition, genuine macroscopic quantum effects, strong quantum fluctuations, low-temperature ferroelectricity, field-induced magnetic transitions, complicated phase diagram and displays long-range magnetic order because of geometrical frustration. Different routes to prepare the frustrated magnetic material was reported such as floating zone technique and conventional high temperature method. $Co_3V_2O_8$ (International Centre for Diffraction Data (ICDD): 16-675) was synthesized with $Co_3O_4$ (ICDD: 80-1536) as binary phase by microwave assisted preparation using $Co(NO_3)_2 ·6H_2O$ and $NH_4VO_3$. The synthesized material was characterization by powder X-ray diffraction, the Fourier transform infrared spectroscopy, and thermogravimetric-differential thermal analysis.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 1; 203-204
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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