Low-temperature gas nitriding effects on mechanical and biological properties of open-porous pure titanium produced by robotic micro-extrusion

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F25%3A00635672" target="_blank" >RIV/68081723:_____/25:00635672 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26620/26:0198059

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0257897225003585?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0257897225003585?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.surfcoat.2025.132084" target="_blank" >10.1016/j.surfcoat.2025.132084</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Low-temperature gas nitriding effects on mechanical and biological properties of open-porous pure titanium produced by robotic micro-extrusion

Popis výsledku v původním jazyce

Direct ink writing (DIW) micro-extrusion additive manufacturing (AM), with its ability to create hierarchically porous metallic structures, is emerging as a key technique in bone repair research. Through controlled sintering, both closed and open microporosities can be tailored within the macroporous metamaterials. This study investigates how low-temperature gas nitriding (500-700 degrees C for 5 and 10 h) affects the mechanical and biological properties of DIW Ti materials with similar to 21% open microporosity, resulting in volumetric nitriding. The flexural behaviour of the microporous filaments, the basic DIW building units, was evaluated by three-point-bending. Nitriding at 500 degrees C and 600 degrees C for 10 h increased the flexural modulus by 25% compared to as-sintered filaments, while flexural strength decreased by 6% and fracture strain by 36%. At 700 degrees C, over-nitriding of isolated sintering necks caused significant reductions in flexural strength and fracture strain, consistent with the enhanced nitriding efficiency observed above 620 degrees C in thermogravimetric measurements. Biological studies on small disc samples showed that nitriding does not impair cellular responses. These findings demonstrate the potential of gas nitriding to functionalize porous AM titanium for biomedical and engineering applications.

Název v anglickém jazyce

Low-temperature gas nitriding effects on mechanical and biological properties of open-porous pure titanium produced by robotic micro-extrusion

Popis výsledku anglicky

Direct ink writing (DIW) micro-extrusion additive manufacturing (AM), with its ability to create hierarchically porous metallic structures, is emerging as a key technique in bone repair research. Through controlled sintering, both closed and open microporosities can be tailored within the macroporous metamaterials. This study investigates how low-temperature gas nitriding (500-700 degrees C for 5 and 10 h) affects the mechanical and biological properties of DIW Ti materials with similar to 21% open microporosity, resulting in volumetric nitriding. The flexural behaviour of the microporous filaments, the basic DIW building units, was evaluated by three-point-bending. Nitriding at 500 degrees C and 600 degrees C for 10 h increased the flexural modulus by 25% compared to as-sintered filaments, while flexural strength decreased by 6% and fracture strain by 36%. At 700 degrees C, over-nitriding of isolated sintering necks caused significant reductions in flexural strength and fracture strain, consistent with the enhanced nitriding efficiency observed above 620 degrees C in thermogravimetric measurements. Biological studies on small disc samples showed that nitriding does not impair cellular responses. These findings demonstrate the potential of gas nitriding to functionalize porous AM titanium for biomedical and engineering applications.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20506 - Coating and films

Projekt

<a href="/cs/project/GA23-07879S" target="_blank" >GA23-07879S: Výzkum vlivu nitridace na únavové chování aditivně vyrobených titanových hierarchických porézních struktur</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Surface and Coatings Technology

ISSN

0257-8972

e-ISSN

1879-3347

Svazek periodika

505

Číslo periodika v rámci svazku

JUN

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

12

Strana od-do

132084

Kód UT WoS článku

001489450800001

EID výsledku v databázi Scopus

2-s2.0-105001146992