Micro-Computed Tomography of Interconnected Mg-TCP Composites Obtained by Current Assisted Metal Infiltration

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F18%3APU124368" target="_blank" >RIV/00216305:26620/18:PU124368 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Micro-Computed Tomography of Interconnected Mg-TCP Composites Obtained by Current Assisted Metal Infiltration

Original language description

Magnesium and calcium phosphates composites are promising biomaterials to create biodegradable load-bearing implants for bone regeneration. The present investigation id focused on the design of an interpenetrated magnesium – tricalcium phosphate (Mg-TCP) composite. In the study, TCP scaffolds were 3D-printed with a tip of 250um in aperture. Final scaffolds with parallel grids and internal macro-pores of 45, 350, 500 and 1000um were obtained and sintered at 11oC for 5h. Later, the infiltration with commercial pure Mg using a new technique named Current Assisted Metal Infiltration (CAMI) was performed. CAMI is a novel technique that allows molten metal infiltration even into brittle ceramic preforms in less than 15 minutes. Fast melting and final solidification of the Mg-TCP composite is achieved with the assistance of a pulsed electrical current as heating resource. The effects of pore size on infiltration were analyzed by X-ray computer microtomography (CT). Virtual tomographic reconstructions were used to observe the components distribution and the remaining porosity of the composite after the infiltration. Results show, a good penetration of the metal into the TCP scaffolds. Nevertheless, fracture of some TCP structures after the infiltration was observed, mainly in those scaffolds with pores of 45um. Some porosity after infiltration was observe d, however, it does not exceed 5% of the total volume of the specimen. Pores were located outside of in the periphery of the preform and were produced during the solidification of magnesium.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Project

<a href="/en/project/LQ1601" target="_blank" >LQ1601: CEITEC 2020</a><br>

Continuities

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

Publication year

2018

Confidentiality

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

Article name in the collection

Metal 2017 Conference Prosceedings

ISBN

978-80-87294-79-6

ISSN

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e-ISSN

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Number of pages

6

Pages from-to

1669-1675

Publisher name

TANGER Ltd.

Place of publication

Ostrava

Event location

Brno

Event date

May 24, 2017

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000434346900269