| SMILAUEROVA, J., P. HARCUBA, M. CIESLAR, M. JANECEKA a Václav HOLÝ. Anomalous X-ray diffraction from omega nanoparticles in beta-Ti(Mo) single crystals. ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES. CHESTER: INT UNION CRYSTALLOGRAPHY, 2019, roč. 75, SEP, s. 718-729. ISSN 2053-2733. Dostupné z: https://dx.doi.org/10.1107/S2053273319008428. |
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@article{1641521,
author = {Smilauerova, J. and Harcuba, P. and Cieslar, M. and Janeceka, M. and Holý, Václav},
article_location = {CHESTER},
article_number = {SEP},
doi = {http://dx.doi.org/10.1107/S2053273319008428},
keywords = {anomalous X-ray diffraction; metastable beta-Ti alloys; diffuse scattering; omega phase},
language = {eng},
issn = {2053-2733},
journal = {ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES},
title = {Anomalous X-ray diffraction from omega nanoparticles in beta-Ti(Mo) single crystals},
url = {http://scripts.iucr.org/cgi-bin/paper?S2053273319008428},
volume = {75},
year = {2019}
}
TY - JOUR
ID - 1641521
AU - Smilauerova, J. - Harcuba, P. - Cieslar, M. - Janeceka, M. - Holý, Václav
PY - 2019
TI - Anomalous X-ray diffraction from omega nanoparticles in beta-Ti(Mo) single crystals
JF - ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES
VL - 75
IS - SEP
SP - 718-729
EP - 718-729
PB - INT UNION CRYSTALLOGRAPHY
SN - 20532733
KW - anomalous X-ray diffraction
KW - metastable beta-Ti alloys
KW - diffuse scattering
KW - omega phase
UR - http://scripts.iucr.org/cgi-bin/paper?S2053273319008428
L2 - http://scripts.iucr.org/cgi-bin/paper?S2053273319008428
N2 - Anomalous X-ray diffraction (AXRD) is a technique which makes use of effects occurring near the energy of an absorption edge of an element present in the studied sample. The intensity of the diffracted radiation exhibits an anomalous decrease when the primary beam energy matches the energy needed to excite an electron from an atomic orbital. The characteristics of this step are sensitive to the concentration of the 'anomalous' element and its spatial distribution in the sample. In the present investigation, AXRD was employed to study omega particles in a metastable beta titanium alloy Ti-15Mo (in wt%). The experiments were done in an energy range around the Mo K edge at 20.0 keV, allowing investigation of the distribution of Mo in the material, which is rejected from the volume of omega particles during their diffusion-driven growth. This paper deals with diffuse scattering patterns around the (006)(beta) diffraction maximum. It was observed that different regions of the diffuse scattering exhibited different variations of diffracted intensity with the incident photon energy near the absorption edge. Numerical simulations of diffuse scattering patterns as well as of energy dependences of the scattered intensity were performed. It was found that the observed patterns and their dependence on the primary beam energy can be explained by taking into account (a) elastic deformation of the beta matrix arising from the presence of slightly misfitting omega particles and (b) the presence of a 'cloud' of a higher Mo concentration around omega particles.
ER -
SMILAUEROVA, J., P. HARCUBA, M. CIESLAR, M. JANECEKA a Václav HOLÝ. Anomalous X-ray diffraction from omega nanoparticles in beta-Ti(Mo) single crystals. \textit{ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES}. CHESTER: INT UNION CRYSTALLOGRAPHY, 2019, roč.~75, SEP, s.~718-729. ISSN~2053-2733. Dostupné z: https://dx.doi.org/10.1107/S2053273319008428.
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