TRIBOLOGICAL BEHAVIOR OF FRICTION COUPLE: METAL/CERAMIC (USED FOR HEAD OF TOTAL HIP REPLACEMENT)

摘要

The aim of this research is to study the tribological behavior of Ceramic for Surgical Implants (Total hip prosthesis). The tribological behavior is evaluated by a wear tests, using Tribometres ball - on -disc and sphere - on - plane. These tests consisted of measuring the weight loss, and the friction coefficient of ceramic. The Oscillating friction and wear tests have been carried out in ambient air with Oscillating Tribotester In accord with standards ISO 7148, ASTM G99-95a, ASTM G 133 - 95 under different conditions of normal applied load (3N, 6N and 10N) and sliding speed (1mm/s, 15mm/s and 25mm/s), as a counter pairs we used the ball of 100Cr 6, 10 mm of diameter. These tribological results are compared with those carried out a Tribometer type pin on disc under different conditions of normal load applied P (19.43, 28 and 44N) and sliding speed (600 rpm and 1020 rpm). The behavior observed for both samples suggests that the wear and friction mechanism during the tests is the same, to increase the resistance to wear and friction of biomedical Ceramic alloy used in total hip prosthesis (femoral stems) the surface coating and treatment is necessary.