Interplay Between FIB Processing, Microstructure, and Micromechanics in Cement Pastes Článek v časopise Case Studies in Construction Materials 2214-5095

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F26%3AN0000001" target="_blank" >RIV/26722445:_____/26:N0000001 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2214509525015323" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2214509525015323</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cscm.2025.e05734" target="_blank" >10.1016/j.cscm.2025.e05734</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Interplay Between FIB Processing, Microstructure, and Micromechanics in Cement Pastes Článek v časopise Case Studies in Construction Materials 2214-5095

Popis výsledku v původním jazyce

This article investigates the interplay between microstructure, focused ion beam (FIB) micro-beam preparation, and micromechanical properties of cement pastes derived from Portland cement CEM I-42.5R. It identifies and quantifies the effects of red{gallium} FIB processing on individual cement phases, including inner and outer hydration products, Portlandite, and residual clinker. A detailed methodology is presented for preparing cantilever micro-beams, emphasizing critical steps such as phase selection, imaging, ion milling, transport, and mechanical testing. Several adverse factors are identified: continuous electron beam imaging increases surface roughness and reduces tensile strength; high ion beam currents (>1 nA) for the given experiment configuration and FIBU settings cause local heating, leading to water evaporation, densification, and phase transformations in C–S–H gels and Portlandite. Additional challenges include ion beam drift, which distorts beam geometry, and vacuum-induced moisture cycling, which promotes micro-cracking. Best practices are proposed to mitigate these issues, including the use of low ion beam currents (0.2–1 nA), minimized electron beam exposure, stable environmental control to prevent moisture cycling, and careful phase selection. The article provides examples of both good and incorrect practices, offering practical guidelines for reliable FIB-based micromechanical testing of cement pastes.

Název v anglickém jazyce

Interplay Between FIB Processing, Microstructure, and Micromechanics in Cement Pastes Článek v časopise Case Studies in Construction Materials 2214-5095

Popis výsledku anglicky

This article investigates the interplay between microstructure, focused ion beam (FIB) micro-beam preparation, and micromechanical properties of cement pastes derived from Portland cement CEM I-42.5R. It identifies and quantifies the effects of red{gallium} FIB processing on individual cement phases, including inner and outer hydration products, Portlandite, and residual clinker. A detailed methodology is presented for preparing cantilever micro-beams, emphasizing critical steps such as phase selection, imaging, ion milling, transport, and mechanical testing. Several adverse factors are identified: continuous electron beam imaging increases surface roughness and reduces tensile strength; high ion beam currents (>1 nA) for the given experiment configuration and FIBU settings cause local heating, leading to water evaporation, densification, and phase transformations in C–S–H gels and Portlandite. Additional challenges include ion beam drift, which distorts beam geometry, and vacuum-induced moisture cycling, which promotes micro-cracking. Best practices are proposed to mitigate these issues, including the use of low ion beam currents (0.2–1 nA), minimized electron beam exposure, stable environmental control to prevent moisture cycling, and careful phase selection. The article provides examples of both good and incorrect practices, offering practical guidelines for reliable FIB-based micromechanical testing of cement pastes.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA23-05435S" target="_blank" >GA23-05435S: Účinky radiačního působení na nanomechanické vlastnosti cementových kompozitů v proměnných podmínkách prostředí</a><br>

Návaznosti

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

Rok uplatnění

2026

Kód důvěrnosti údajů

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

Název periodika

Case Studies in Construction Materials

ISSN

2214-5095

e-ISSN

—

Svazek periodika

24

Číslo periodika v rámci svazku

July

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

24

Strana od-do

1-24

Kód UT WoS článku

001664498400001

EID výsledku v databázi Scopus

2-s2.0-105029586412