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Influence Of The Powder Mixture In The Fabrication Process Of Ti-Ag Biomedical Alloys Obtained By Powder Metallurgy

  • : Jenny Cecilia Zambrano Carrullo1, Alba Dalmau Borrás2, Joan Lario Femenia1, Vicente Amigó Borrás1, Javier Navarro-Laboulais2
  • : 1Institute of Materials Technology UPV, 2ISIRYM UPV
  • : PDF Download
  • : 2018

Abstract

Titanium is commonly used as a biomaterial and Ti-Ag alloys have increased their importance due to the antibacterial behavior of silver. In this study Ti-Ag alloys (5 10 and 15 wt.% Ag) have been obtained by powder metallurgy and the influence of the powder mixture methodology has been analyzed: blended elemental (BE) and mechanical alloying (MA). The powders have been compacted at 600 and 900 MPa respectively and sintered under high vacuum for 3 hours at 950 °C. The obtained Ti-Ag alloys have been microstructurally characterized (SEM and XRD) and mechanically tested by means of hardness and bending tests. Electrochemical tests were carried out using a three electrode cell in a 1 M NaCl solution. OCP polarization potentiostatic and electrochemical impedance spectroscopy techniques were employed in order to evaluate corrosion resistance. We conclude that the initial conditions of the powders before sintering modify the electrochemical behavior of the Ti-Ag alloys

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