Anomalous X-ray diffraction from omega nanoparticles in beta-Ti(Mo) single crystals

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10398930" target="_blank" >RIV/00216208:11320/19:10398930 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14740/19:00113444

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=vz5RpY46IR" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=vz5RpY46IR</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1107/S2053273319008428" target="_blank" >10.1107/S2053273319008428</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Anomalous X-ray diffraction from omega nanoparticles in beta-Ti(Mo) single crystals

Popis výsledku v původním jazyce

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 &apos;anomalous&apos; 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 &apos;cloud&apos; of a higher Mo concentration around omega particles.

Název v anglickém jazyce

Anomalous X-ray diffraction from omega nanoparticles in beta-Ti(Mo) single crystals

Popis výsledku anglicky

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 &apos;anomalous&apos; 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 &apos;cloud&apos; of a higher Mo concentration around omega particles.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Acta Crystallographica. Section A: Foundations and Advances [online]

ISSN

2053-2733

e-ISSN

—

Svazek periodika

75

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

718-729

Kód UT WoS článku

000484157300005

EID výsledku v databázi Scopus

2-s2.0-85071777284