Temat: 81.40.Jj - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Temperature Dependent Anharmonic Properties of Lead Chalcogenides
Autorzy:: Raju, K.
Powiązania:: https://bibliotekanauki.pl/articles/1535668.pdf
Data publikacji:: 2010-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 62.20.D-
81.40.Jj
Opis:: Calculations were made to investigate the anharmonic properties of lead chalcogenides PbS, PbSe and PbTe at elevated temperatures by means of primary physical parameters viz. nearest-neighbour distance and hardness parameter using long- and short-range potentials. Higher-order elastic constants are computed up to their melting temperature for these crystals. The first order pressure derivatives of second- and third-order elastic constants, the second-order pressure derivatives of second-order elastic constants and partial contractions are also evaluated at different temperatures. As the experimental elastic constants are not available at high temperatures, hence our results were only compared with the available values obtained at room temperature. The nature of the elastic behaviour in these compounds was analyzed.
Źródło:: Acta Physica Polonica A; 2010, 118, 4; 600-605
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Anharmonic Properties of Alkali Halides and Cyanides
Autorzy:: Kailash, -
Powiązania:: https://bibliotekanauki.pl/articles/1943981.pdf
Data publikacji:: 1996-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 62.20.Dc
81.40.Jj
Opis:: Anharmonic properties of 16 alkali halides and 4 alkali cyanides are investigated using long-range Coulomb and short-range Born-Mayer potentials starting from the nearest-neighbour distance and repulsive parameter. This study includes the prediction of second, third and fourth order elastic constants, the pressure derivatives of second and third order elastic constants and partial contractions at elevated temperatures. The results obtained in present investigations are in reasonable agreement compared with experimental studies.
Źródło:: Acta Physica Polonica A; 1996, 89, 1; 75-90
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Poisson Ratio and Biaxial Relaxation Coefficient in $In_{x}Ga_{1-x}N$ and $In_{x}Al_{1-x}N$ Alloys
Autorzy:: Łepkowski, S.
Gorczyca, I.
Powiązania:: https://bibliotekanauki.pl/articles/1492915.pdf
Data publikacji:: 2011-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 62.20.de
61.43.Dq
81.40.Jj
Opis:: We present theoretical results showing dependence of Poisson ratio and biaxial relaxation coefficient on composition and atomic arrangement in wurtzite $In_{x}Ga_{1-x}N$ and $In_{x}Al_{1-x}N$ alloys. Our calculations reveal that the Poisson ratio determined for $In_{x}Ga_{1-x}N$ and $In_{x}Al_{1-x}N$ alloys subjected to a uniaxial stress parallel to the c axis of the wurtzite structure shows significant superlinear dependence on composition. The superlinear bowing in Poisson ratio is enlarged by the effect of In clustering. The biaxial relaxation coefficient determined for $In_{x}Ga_{1-x}N$ and $In_{x}Al_{1-x}N$ alloys subjected to a biaxial stress in the plane perpendicular to the c axis of the wurtzite structure changes superlinearly and linearly with x in $In_{x}Ga_{1-x}N$ and $In_{x}Al_{1-x}N$, respectively. The effect of In atom clustering results in sublinear dependence of the biaxial relaxation coefficient in both $In_{x}Ga_{1-x}N$ and $In_{x}Al_{1-x}N$ alloys.
Źródło:: Acta Physica Polonica A; 2011, 120, 5; 902-904
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Behaviour of Di-Transition-Metal Nitride $Ti_{1-x}Zr_{x}N$ Alloy at High Pressure
Autorzy:: Chihi, T.
Boucetta, S.
Maouche, D.
Powiązania:: https://bibliotekanauki.pl/articles/1585103.pdf
Data publikacji:: 2009-12
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 81.40.Jj
63.20.dk
62.50.-p
Opis:: By means of density-functional theory with the generalized gradient approximation and using the virtual-crystal approximation, we report first-principles calculation results on the structural and elastic properties of $Ti_{1-x}Zr_{x}N$ alloy. In order to gain some further information on the mechanical properties of $Ti_{0.5}Zr_{0.5}N$ compound, we also calculated the Young modulus, Poisson ratio, and anisotropy factor. The variation of calculated unit cell parameter for $Ti_{1-x}Zr_{x}N$ structure increases with Zr content x. A linear dependence of the elastic constants and the bulk modulus over a range of composition x is found. All the $C_{ij}$ of $Ti_{0.5}Zr_{0.5}N$ increase linearly with increasing pressure. The same behaviour is observed for the other compounds with Zr compositions x.
Źródło:: Acta Physica Polonica A; 2009, 116, 6; 1085-1089
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: Anisotropic Elastic and Acoustic Properties of Bulk Graphene Nanoplatelets Consolidated by Spark Plasma Sintering
Autorzy:: Koller, M.
Seiner, H.
Landa, M.
Nieto, A.
Agarwal, A.
Powiązania:: https://bibliotekanauki.pl/articles/1402122.pdf
Data publikacji:: 2015-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 43.35.Cg
81.40.Jj
81.05.ue
81.20.Ev
Opis:: Elastic anisotropy and acoustic attenuation in bulk material consisting of consolidated graphene nanoplatelets are studied. The material was prepared by spark plasma sintering, and exhibits highly anisotropic microstructure with the graphene nanoplatelets oriented perpendicular to the spark plasma sintering compression axis. The complete tensor of elastic constants is obtained using a combination of two ultrasonic methods: the through-transmission method and the resonant ultrasound spectroscopy. It is shown that the examined material exhibits very strong anisotropy both in the elasticity (the Young moduli in directions parallel to the graphene nanoplatelets and perpendicular to them differ by more than 20 times) and in the attenuation, where the dissipative effect of the internal friction in the graphene nanoplatelets combines with strong scattering losses due to the porosity. The results are compared with those obtained for ceramic-matrix/graphene nanoplatelet composites by the same ultrasonic methods.
Źródło:: Acta Physica Polonica A; 2015, 128, 4; 670-674
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Elastic-plastic transition in MBE-grown GaSb semiconducting crystal examined by nanoindentation
Autorzy:: Majtyka, A.
Trębala, M.
Tukiainen, A.
Chrobak, D.
Borgieł, W.
Räisänen, J.
Nowak, R.
Powiązania:: https://bibliotekanauki.pl/articles/1075863.pdf
Data publikacji:: 2016-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 81.40.Jj
62.20.F-
81.15.Hi
81.05.Ea
Opis:: The present paper concerns the elastic-plastic nanodeformation of Te-doped GaSb crystals grown by molecular beam epitaxy on the n-type of GaSb substrate. The conventional analysis of nanoindentation data obtained with sharp triangular (Berkovich) and spherical tip revealed the elastic modulus (E=83.07± 1.78 GPa), hardness (H=5.19±0.25 GPa) and "true hardness" (H_{T}=5.73±0.04 GPa). The registered pop-in event which indicates the elastic-plastic transition in GaSb crystal points towards the corresponding yield strength (σ_{Y}=3.8±0.1 GPa). The origin of incipient plasticity in GaSb crystal is discussed in terms of elastic-plastic deformation energy concept.
Źródło:: Acta Physica Polonica A; 2016, 130, 4; 1131-1133
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: Anisotropic Phase Field Model of Heteroepitaxial Growth
Autorzy:: Hoang, Dieu
Beneš, M.
Stráský, J.
Powiązania:: https://bibliotekanauki.pl/articles/1402067.pdf
Data publikacji:: 2015-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 81.10.Aj
05.70.Ln
81.40.Jj
81.30.Fb
Opis:: We study the heteroepitaxial growth of thin layers by means of the modified phase-field model with the incorporated anisotropy. The influence of elastic and surface energies on the layer growth is considered. For numerical solution of the model, an explicit numerical scheme based on the finite element method is employed. The obtained computational results with various anisotropy settings demonstrate the anisotropic thin-layer pattern growth.
Źródło:: Acta Physica Polonica A; 2015, 128, 4; 520-522
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 8.

Tytuł:: First principles study of mechanical stability and thermodynamic properties of K₂S under pressure and temperature effect
Autorzy:: Boufadi, F.
Bidai, K.
Ameri, M.
Bentouaf, A.
Bensaid, D.
Azzaz, Y.
Ameri, I.
Powiązania:: https://bibliotekanauki.pl/articles/1070528.pdf
Data publikacji:: 2016-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 62.20.de
81.40.Jj
71.15.Ap
62.20.dj
Opis:: First principles calculations on structural, elastic and thermodynamic properties of K₂S have been made using the full-potential augmented plane-waves plus local orbitals within density functional theory using generalized gradient approximation for exchange correlation potentials. The ground state lattice parameter, bulk moduli have been obtained. The second-order elastic constants, Young and shear modulus, Poisson ratio, have also been calculated. Calculated structural, elastic and other parameters are in good agreement with available data. The elastic constants and thermodynamic quantities under high pressure and temperature are also calculated and discussed.
Źródło:: Acta Physica Polonica A; 2016, 129, 3; 315-322
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 9.

Tytuł:: Influence of High Fluence Nitrogen Ion Implantation οn Pseudoelastic Behaviour of NiTi Shape Memory Alloy
Autorzy:: Levintant-Zayonts, N.
Kucharski, S.
Powiązania:: https://bibliotekanauki.pl/articles/1503941.pdf
Data publikacji:: 2011-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 62.20.fg
81.40.Jj
61.72.U-
61.72.-y
Opis:: An attempt to evaluate mechanical properties changes (superelastic phenomena) in the shape memory NiTi alloy (austenitic form) due to ion implantation ($N^{+}$, fluences of 1 × $10^{17}$ and 4 × $10^{18} cm^{-2}$) has been made. We applied the differential scanning calorimetry technique and spherical indentation (micro- and nanoindentation scale) test to study superelastic effect. The results of investigations of selected functional properties, i.e. characteristic temperatures, total and recovered penetration depth on the implanted and non-implanted NiTi samples are presented.
Źródło:: Acta Physica Polonica A; 2011, 120, 1; 79-82
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 10.

Tytuł:: Determination of Stresses and Forces on the Orthodontic System by Using Numerical Simulation of the Finite Elements Method
Autorzy:: Ferčec, J.
Glišić, B.
Šćepan, I.
Marković, E.
Stamenković, D.
Anžel, I.
Flašker, J.
Rudolf, R.
Powiązania:: https://bibliotekanauki.pl/articles/1418115.pdf
Data publikacji:: 2012-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 02.70.Dh
81.40.Jj
87.10.Kn
87.19.Rr
Opis:: This study was addressed to use knowledge about the orthodontic system with numerical simulation of the finite elements method. For the first time we simulated the stresses on the orthodontic system and, in this manner, calculated the orthodontic force on the tooth. A 3D orthodontic model or orthodontic system was designed resembling moderate crowding in the dental arch with all supporting structures. CATIA V5 computer software was used to set up a model for the orthodontic system and ABAQUS was used for simulation of the stresses on the orthodontic system. Our attention was focused on the stresses on the tooth lateral incisor and its periodontal ligament. The results of the numerical simulation showed complex stresses on the tooth lateral incisor and its periodontal ligament. In this paper there is presented a calculation of the orthodontic force acting on the tooth lateral incisor due to the orthodontic wire. This orthodontic force was calculated from the stresses on the bracket. The calculated orthodontic force was in the area which is considered as the optimal orthodontic force for movement of the tooth.
Źródło:: Acta Physica Polonica A; 2012, 122, 4; 659-665
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "81.40.Jj" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język