Comportement à la corrosion des alliages TiNi et TA6V4 dans la salive artificielle et performance d’usure

الملخص EN

This work aims to study the tribological performance in dry conditions and electrochemical behavior, in the artificial saliva of TiNi (50/50) alloys in comparison with TA6V4 alloys in the focus to use them for dental applications.

The TiNi alloy was prepared in a vacuum induction melting furnace whileTA6V4 commercial alloy should be used as a reference material.

The TiNi alloy (50/50) was prepared in a vacuum induction melting furnace while the TA6V4 commercial alloy will be used as a reference material.

The microstructural analysis and chemical composition of the two TiNi and TA6V4 alloys was determined by scanning electron microscopy (SEM) coupled to EDS.

Results showed that TiNi alloy exhibits a better wear resistance in dry sliding mode (1.327x10-4 mm3 / Nm) when compared to the alloy TA6V4 (9,506x10-4 mm3 / Nm).

The wear mechanisms of both alloys have been clearly established.

It can be retained that NiTi alloy degradation is governed by an adhesive and abrasive wear mechanism, but for the TA6V4 alloy, abrasive and oxidative wear mechanisms are determined.

Electrochemical studies reveal a passive behavior character and higher resistance against corrosion.