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

Result code in 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>

Alternative codes found

RIV/00216305:26620/26:0198059

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20506 - Coating and films

Project

<a href="/en/project/GA23-07879S" target="_blank" >GA23-07879S: Exploring how nitriding affects fatigue behaviour of additive manufactured titanium hierarchical porous structures</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

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

Name of the periodical

Surface and Coatings Technology

ISSN

0257-8972

e-ISSN

1879-3347

Volume of the periodical

505

Issue of the periodical within the volume

JUN

Country of publishing house

CH - SWITZERLAND

Number of pages

12

Pages from-to

132084

UT code for WoS article

001489450800001

EID of the result in the Scopus database

2-s2.0-105001146992