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Otrzymywanie porowatego tytanu na implanty medyczne

Szaraniec B., Ziąbka M., Chłopek J., Papargyri S., Tsipas D.

Engineering of Biomaterials

2008

Vol. 11, no. 81-84

49--52

Celem pracy było otrzymanie metodą metalurgii proszków porowatych kształtek tytanowych przeznaczonych na implanty medyczne. Przeprowadzono próbę zoptymalizowania procesu technologicznego. Poprzez dobór odpowiednich parametrów takich jak środowisko, temperatura obróbki termicznej, a także ilość użytego porogenu uzyskano próbki tytanowe o zróżnicowanej porowatości i właściwościach mechanicznych. W pracy przedstawiono dwie metody otrzymywania omawianych próbek, z których pierwsza (obróbka termiczna w atmosferze argonu) okazała się nieskuteczna, ze względu na destrukcję materiału, natomiast druga metoda (obróbka termiczna z zastosowaniem próżni) pozwoliła otrzymać próbki o założonych parametrach.

The aim of this work was to obtain porous titanium sponges in a powder metallurgy process which might be applied as medical implants. The attempt of process optimization was carried out. Selection of parameters such as biological solution, temperature of thermal treatment and porogen amount allowed to obtain titanium samples with different porosity and proper mechanical properties. Two types of obtaining methods were presented in this work. First (thermal treatment in argon atmosphere) which was not sufficient due to material destruction and second (thermal treatment in vacuum atmosphere) which allows to obtain titanium samples with expected parameters.

Production of titanium and hydroxyapatite composite biomaterial for use as biomedical implant by mechanical alloying process

Papargyri S. A., Tsipas D., Stergioudis G., Chlopek J.

Inżynieria Biomateriałów

2005

R. 8, nr 46

27--30

Mechanical alloying is a ball milling process where a powder mixture placed in the ball mill is subjected to high energy collision form the balls. As the power particles in the vial are continuously impacted by the balls, cold welding between the particles and fracturing of the particles take place repeatedly during the ball milling process. In this article you will be presented with the case of mechanically alloying a metal such as titanium with hydroxyapatite, a ceramic consisting of calcium, phosphate and hydroxyls. The composite material will be used as a biomaterial used for implants. The starting powders were weighted, mechanically alloyed in an inert atmosphere, pressed and then thermally treated up to 1150 Celsius degrees in a thermal cycle. The samples were then analyzed by TGA-TG, optical microscope, XRD, and SEM. After the thermal treatment, the samples had an outer shell that was composed of hydroxyapatite, and an inner core that consisted of titanium. Mechanical alloying of titanium and hydroxyapatite did not give a uniform distribution of the powders, but titanium particles were covered by hydroxyapatite fragments only on the surface of the specimens.