Porous magnesium alloys prepared by powder metallurgy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F16%3A43902508" target="_blank" >RIV/60461373:22310/16:43902508 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.17222/mit.2015.226" target="_blank" >http://dx.doi.org/10.17222/mit.2015.226</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.17222/mit.2015.226" target="_blank" >10.17222/mit.2015.226</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Porous magnesium alloys prepared by powder metallurgy

Popis výsledku v původním jazyce

This paper deals with the development of porous magnesium alloys that can be used in medicine for bone fixations and implants. The individual components of the alloys were chosen so that the biodegradability of the material is maintained. The advantage of these magnesium materials should be an ability to decompose after some time. This should reduce the number of surgeries and consequently increase the comfort of patients. All the samples were prepared using the method of powder metallurgy. The influence of particular alloying elements - aluminium, zinc, yttrium - on the structure of the alloys was explored, with changes being seen in the area of the fraction of pores, the size and the shapes of the pores, according to the alloying elements and the prolongation of the time of sintering the powders. By altering the chemical composition and the time of sintering the demanded porosity was not achieved, and that is the reason why a pore-forming agent (ammonium carbonate) was added. It was removed by thermal decomposition before the powder's sintering. By adding ammonium carbonate we managed to increase the porosity and at the same time we obtained more pores (in equivalent diameter 200-400 ?m). The mechanical properties of the samples were tested in compression. In the samples without the pore-forming agent the values of the ultimate strength were larger than the values of natural bones. After adding the pore-forming agent the ultimate strength and modulus elasticity were reduced.

Název v anglickém jazyce

Porous magnesium alloys prepared by powder metallurgy

Popis výsledku anglicky

This paper deals with the development of porous magnesium alloys that can be used in medicine for bone fixations and implants. The individual components of the alloys were chosen so that the biodegradability of the material is maintained. The advantage of these magnesium materials should be an ability to decompose after some time. This should reduce the number of surgeries and consequently increase the comfort of patients. All the samples were prepared using the method of powder metallurgy. The influence of particular alloying elements - aluminium, zinc, yttrium - on the structure of the alloys was explored, with changes being seen in the area of the fraction of pores, the size and the shapes of the pores, according to the alloying elements and the prolongation of the time of sintering the powders. By altering the chemical composition and the time of sintering the demanded porosity was not achieved, and that is the reason why a pore-forming agent (ammonium carbonate) was added. It was removed by thermal decomposition before the powder's sintering. By adding ammonium carbonate we managed to increase the porosity and at the same time we obtained more pores (in equivalent diameter 200-400 ?m). The mechanical properties of the samples were tested in compression. In the samples without the pore-forming agent the values of the ultimate strength were larger than the values of natural bones. After adding the pore-forming agent the ultimate strength and modulus elasticity were reduced.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

<a href="/cs/project/GBP108%2F12%2FG043" target="_blank" >GBP108/12/G043: Mikro- a nanokrystalické materiály s vysokým podílem rozhraní pro moderní strukturní aplikace, biodegradabilní implantáty a uchovávání vodíku</a><br>

Návaznosti

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

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Materiali In Technologie

ISSN

1580-2949

e-ISSN

—

Svazek periodika

50

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

SI - Slovinská republika

Počet stran výsledku

6

Strana od-do

917-922

Kód UT WoS článku

000391224300013

EID výsledku v databázi Scopus

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