Comparison of morphology and compressive deformation behavior of copper foams manufactured via freeze-casting and space-holder methods

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F21%3A00551797" target="_blank" >RIV/61389005:_____/21:00551797 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/21:10437713

Výsledek na webu

<a href="https://doi.org/10.1016/j.jmrt.2021.11.108" target="_blank" >https://doi.org/10.1016/j.jmrt.2021.11.108</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jmrt.2021.11.108" target="_blank" >10.1016/j.jmrt.2021.11.108</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Comparison of morphology and compressive deformation behavior of copper foams manufactured via freeze-casting and space-holder methods

Popis výsledku v původním jazyce

Copper (Cu) foams with high porosity of about 63-78% were processed by the freeze-casting (FC) and space-holder (SH) methods. The FC and SH techniques yielded lamellar and polygonal pore structures, respectively, with similar porosities. The deformation behaviors of the two different types of Cu foams were compared using uniaxial compression and a simultaneous acoustic emission (AE) and video recording analysis. It was found that the compressive yield strength values for the FC-Cu and SH-Cu foams were significantly different, which were 19-29 MPa and 1.2-2.3 MPa, respectively. Furthermore, the energy absorbed during compression up to the strain of 50% was obtained as similar to 12.3 MJ m(-3) and similar to 2.7 MJ m(-3) for the FC-Cu and SH-Cu foams, respectively, resulting in approximately 4.6 times higher energy absorption capability for the FC-Cu foam. The deformation processes occurring during compression in the two Cu foams were studied by the AE and image analysis. The video and the evaluated AE parameters (e.g., the AE voltage, the cumulative number of events, and the cumulative energy) revealed that, in the case of the FC foam, the localized fracture of the struts within a well-defined single deformation band took place, which gave rise to pronounced AE signals (mostly in the plateau stage of compression). By contrast, the deformation was highly homogeneous in the case of the SH-Cu foam, and the main deformation mechanisms were gradual bending and buckling of the foam struts during compression.

Název v anglickém jazyce

Comparison of morphology and compressive deformation behavior of copper foams manufactured via freeze-casting and space-holder methods

Popis výsledku anglicky

Copper (Cu) foams with high porosity of about 63-78% were processed by the freeze-casting (FC) and space-holder (SH) methods. The FC and SH techniques yielded lamellar and polygonal pore structures, respectively, with similar porosities. The deformation behaviors of the two different types of Cu foams were compared using uniaxial compression and a simultaneous acoustic emission (AE) and video recording analysis. It was found that the compressive yield strength values for the FC-Cu and SH-Cu foams were significantly different, which were 19-29 MPa and 1.2-2.3 MPa, respectively. Furthermore, the energy absorbed during compression up to the strain of 50% was obtained as similar to 12.3 MJ m(-3) and similar to 2.7 MJ m(-3) for the FC-Cu and SH-Cu foams, respectively, resulting in approximately 4.6 times higher energy absorption capability for the FC-Cu foam. The deformation processes occurring during compression in the two Cu foams were studied by the AE and image analysis. The video and the evaluated AE parameters (e.g., the AE voltage, the cumulative number of events, and the cumulative energy) revealed that, in the case of the FC foam, the localized fracture of the struts within a well-defined single deformation band took place, which gave rise to pronounced AE signals (mostly in the plateau stage of compression). By contrast, the deformation was highly homogeneous in the case of the SH-Cu foam, and the main deformation mechanisms were gradual bending and buckling of the foam struts during compression.

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

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Journal of Materials Research and Technology-JMR&T

ISSN

2238-7854

e-ISSN

2214-0697

Svazek periodika

15

Číslo periodika v rámci svazku

NOV-DEC

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

6855-6865

Kód UT WoS článku

000735373200004

EID výsledku v databázi Scopus

2-s2.0-85120854157