Crystal growth from mechanically induced defects

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F17%3A39902700" target="_blank" >RIV/00216275:25310/17:39902700 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s10973-016-5529-0" target="_blank" >http://dx.doi.org/10.1007/s10973-016-5529-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10973-016-5529-0" target="_blank" >10.1007/s10973-016-5529-0</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Crystal growth from mechanically induced defects

Popis výsledku v původním jazyce

For the first time, infrared microscopy was used to directly confirm the presence of crystallites originating from mechanically induced defects. Differential scanning calorimetry and infrared microscopy were used to study crystallization behavior of the GeTe4 glass. Both non-isothermal and isothermal DSC crystallization data were deconvoluted by state-of-the-art methods, and the identified sub-processes were described in terms of appropriate kinetic models. While the bulk samples showed zero-order (F0) crystallization kinetics, the GeTe4 powders exhibited complex kinetic behavior describable by competing Johnson-Mehl-Avrami and autocatalytic crystallization mechanisms. The concept of crystallization from mechanically induced defects was used to explain the difference in the kinetic behavior of bulk and powdered materials. Microscopic observation of two types of crystallites being present in a partially crystallized powder grain corresponds well to the occurrence of two crystallization mechanisms identified for the DSC data. The zero-order crystallization kinetics found for the DSC data of bulk samples was verified by microscopic crystal growth rate measurements.

Název v anglickém jazyce

Crystal growth from mechanically induced defects

Popis výsledku anglicky

For the first time, infrared microscopy was used to directly confirm the presence of crystallites originating from mechanically induced defects. Differential scanning calorimetry and infrared microscopy were used to study crystallization behavior of the GeTe4 glass. Both non-isothermal and isothermal DSC crystallization data were deconvoluted by state-of-the-art methods, and the identified sub-processes were described in terms of appropriate kinetic models. While the bulk samples showed zero-order (F0) crystallization kinetics, the GeTe4 powders exhibited complex kinetic behavior describable by competing Johnson-Mehl-Avrami and autocatalytic crystallization mechanisms. The concept of crystallization from mechanically induced defects was used to explain the difference in the kinetic behavior of bulk and powdered materials. Microscopic observation of two types of crystallites being present in a partially crystallized powder grain corresponds well to the occurrence of two crystallization mechanisms identified for the DSC data. The zero-order crystallization kinetics found for the DSC data of bulk samples was verified by microscopic crystal growth rate measurements.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20300 - Mechanical engineering

Projekt

<a href="/cs/project/GAP106%2F11%2F1152" target="_blank" >GAP106/11/1152: Reverzibilní krystalizace a strukturni relaxace amorfních materiálů pro záznam informace</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Journal of Thermal Analysis and Calorimetry

ISSN

1388-6150

e-ISSN

—

Svazek periodika

127

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

799-808

Kód UT WoS článku

000392337000088

EID výsledku v databázi Scopus

2-s2.0-84970016901