FRICTION AND WEAR BEHAVIOUR OF Ti-6AI-7Nb BIOMATERIAL ALLOY
TypeCommunications avec actes
Titanium and its alloys have been used as implant materials due to their very good mechanical and corrosion resistance and biocompatibility [1,2]. The most used biomaterials were commercially pure titanium (CP-Ti} issued in clinics, although CP- Ti has been pointed out to have disadvantages of low strength, difficulty for polishing, and poor wear resistance. Therefore, Titanium is still insufficient for high-stress applications ; e.g., long spanned fixed prostheses and the frameworks of removable partial dentures.Ti-6Al-4V alloy, originally developped as an aeronautical material, has been tested as a replacement for CP-Ti, because of its high mechanical properties with sufficient corrosion resistance, however, the cytoxicity of elemental Vanadium is questionable. Subsequently, some researches prove that vanadium and aluminum ions released from this ternary alloy can induce cytoxic effects or neurological disorders, respectively . Also, for long-term, this alloy has transferred in sufficient load to adjacent bones, resulting in good resorbption and eventual loosening of the implant. Another ternary alloy used as implants was vanadium free, a+ii alloy, especially Ti-6Al-7Nb alloy that revealed improved mechanical characteristics, corrosion resistance and biocompatibility , developed for orthopedics application as a wrought material, has been evaluated as a new alloy for total hip prostheses. Niobium exhibits a similar effect to vanadium instabilizing ii phase in the Ti-Nb binary system, which is necessary for providing the a -ii two-phase structure. Therefore, niobium was used as the ternary element to produce the desirable microstructure in the Ti-6Al-7Nb alloy. Ascompared with Ti-6Al-4 V alloy, in a tensile test, these alloy show slightly lower strength and about 40% higher elongation.
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Sliding friction and wear performance of the nano-bioceramic α -Al 2 O 3 prepared by high energy milling FELLAH, Mamoun; SAMAD, Mohammed Abdul; LABAIZ, Mohamed; ASSALA, Omar; IOST, Alain (ELSEVIER, 2015)The structural evolution and morphological changes of the nanostructured α-Al2O3 powder using different milling times (1, 8, 16 and 24 h) were studied. It is observed that the crystallite size of the particles reduced to ...
FELLAH, Mamoun; ASSALA, Omar; LABAIZ, Mohamed; DEKHIL, Leila; IOST, Alain (Scientific Research, 2013)Titanium has been increasingly applied to biomedical application because of its improved mechanical characteristics, corrosion resistance and biocompatibility. However their application remains limited, due to the low ...
FELLAH, Mamoun; LABAIZ, Mohamed; ASSALA, Omar; DEKHIL, Leila; ZERNIZ, N.; IOST, Alain (EDP Sciences, 2014)Friction and wear plays an important role in determining the performance of biomaterials. To this end, the present research is carried out to understand the tribological behavior important biometallic alloy, Ti-6Al-4V under ...
FELLAH, Mamoun; LABAIZ, Mohamed; ASSALA, Omar; IOST, Alain; DEKHIL, Leila (Taylor & Francis, 2013)The aim of this research is to study the tribological behaviour of AISI 316L stainless steel for surgical implants (total hip prosthesis). The tribological behaviour is evaluated by wear tests, using tribometers ball on ...
LABAIZ, Mohamed; FELLAH, Mamoun; ASSALA, Omar; IOST, Alain (Centre pour Ia Communication Scientifique Directe, 2015)Titanium and its alloys have been used as implant materials due to their very good mechanical and corrosion resistance and biocompatibility [1,2]. The most used biomaterials were commercially pure titanium (CP-Ti} ...