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- W2924554180 abstract "This work aims at the tribological study of a hydroxyapatite deposit (HAP, Ca 10 (PO 4 ) 6 (OH) 2 ) on a Ti-6AL-4V alloy substrate, HAP is used as a coating in the industry biomedical for several decades for dental and orthopedic implants. It appears to be the most suitable ceramic material for the construction of artificial bone tissue due to its excellent biocompatibility properties. Unfortunately, the mechanical characteristics of pure ceramics of hydroxyapatite are bad. Medical applications are limited to small implants not mechanically loaded. Titanium and its alloys are extensively used in implantation and are known as biomaterials of choice because of their excellent mechanical properties and their moduli of elasticity which makes them compatible with bone structures [1, 2, 3] Hydroxyapatite is used as a coating on titanium alloys to facilitate the grafting of the implant with the bone tissue because it represents the first mineral constituent of the bone [4]. In this work, test samples obtained by plasma projection were studied. After microstructural observation in optical and scanning microscopy, surface roughness and hardness were measured. A rotational wear test was used to measure the coefficient of friction μ and to quantify the loss of mass, which increases with the normal force applied. The hydroxyapatite coating exhibits better tribological behavior than the Ti-6-Al-4V alloy. Wear tracks analyzed by SEM show abrasive wear. References [1] Achouak Elghazel .Mechanical and tribological properties of tricalcium phosphate Reinforced with fluorapatite as coating for orthopedic implant in Materials Letters 2017 [2] J.Takadoum, « Materiaux et surfaces en tribologie », lavoisier , 2007 [3] E. Peon Aves & M. S. Sader « Comparative Study of Hydroxyapatite Coatings Obtained by Sol-Gel and Electrophoresis on Titanium Sheets » Revista Materia vol.12, n. 1, 2007, pp. 156 – 163, [4] C.Richard & Geetha Manivasagam , Measurement of Wear and Fric tion resistance of bulk and coated materials in « Materials Characterization: Modern Methods and Applications », Pan Stanford Publishing , 2015" @default.
- W2924554180 created "2019-04-01" @default.
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- W2924554180 date "2018-07-27" @default.
- W2924554180 modified "2023-09-28" @default.
- W2924554180 title "Tribological behavior study of a hydroxyapatite deposit (HAP, Ca10 (PO4) 6 (OH) 2) on a Ti-6Al-4V alloy substrate" @default.
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