Structural Studies of Submicrocrystalline Copper and Copper Composites by Different Methods

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F08%3A00206866" target="_blank" >RIV/00216208:11320/08:00206866 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Structural Studies of Submicrocrystalline Copper and Copper Composites by Different Methods

Popis výsledku v původním jazyce

Microstructure of Cu, Cu Al2O3, Cu Zr samples deformed by high pressure torsion and equal channel angular pressing was studied by several methods: X-ray diffraction (XRD), transmission electron microscopy (TEM), positron annihilation spectroscopy (PAS) and electron back-scatter diffraction (EBSD). Line broadening analysis showed that the HPT samples have smaller crystallite size compared to the ECAP samples while the dislocation densities were similar - of the order of 1 x 10(15) m(-2). Only small changes in the mean dislocation density with increasing number of ECAP passes were found by XRD. On the other hand, significant microstructural changes and grain fragmentation were revealed by TEM and EBSD. With increasing strain due to ECAP elongated dislocation cells with low-angle boundaries developed into more equiaxed subgrains and grains separated by high-angle grain boundaries.

Název v anglickém jazyce

Structural Studies of Submicrocrystalline Copper and Copper Composites by Different Methods

Popis výsledku anglicky

Microstructure of Cu, Cu Al2O3, Cu Zr samples deformed by high pressure torsion and equal channel angular pressing was studied by several methods: X-ray diffraction (XRD), transmission electron microscopy (TEM), positron annihilation spectroscopy (PAS) and electron back-scatter diffraction (EBSD). Line broadening analysis showed that the HPT samples have smaller crystallite size compared to the ECAP samples while the dislocation densities were similar - of the order of 1 x 10(15) m(-2). Only small changes in the mean dislocation density with increasing number of ECAP passes were found by XRD. On the other hand, significant microstructural changes and grain fragmentation were revealed by TEM and EBSD. With increasing strain due to ECAP elongated dislocation cells with low-angle boundaries developed into more equiaxed subgrains and grains separated by high-angle grain boundaries.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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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)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2008

Kód důvěrnosti údajů

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

Název periodika

Zeitschrift für Kristallographie

ISSN

0044-2968

e-ISSN

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Svazek periodika

Neuveden

Číslo periodika v rámci svazku

27

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

8

Strana od-do

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Kód UT WoS článku

000264441800009

EID výsledku v databázi Scopus

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