Mechanical improvement of hydroxyapatite by TiOx nanoparticles deposition |
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Authors: | J. R. Díaz-Estrada E. Camps L. Escobar-Alarcón J. A. Ascencio |
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Affiliation: | (1) Facultad de Química, Universidad Autónoma del Estado de México, Colon y Tollocan, Toluca, Edo. de México, Mexico;(2) Departamento de Física, Instituto Nacional de Investigaciones Nucleares, Apartado postal 18-1027, Mexico, DF, 11801, Mexico;(3) Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas 152, Mexico, D.F, 07730, Mexico |
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Abstract: | Deposition of Ti was carried out by laser ablation onto hydroxyapatite porous discs in an Ar atmosphere. Ti nanoparticles were deposited onto HAp surface in order to modify its roughness and morphology as it is observed by scanning electron microscopy (SEM) and scanning probe microscopy (SPM). A homogeneous distribution of Ti over the disc surface was corroborated by elemental mapping. A comparison of the hydroxyapatite hardness before and after deposition was performed using SPM nanoindentation. Transmission Electron Microscopy (TEM) showed that the Ti nanoparticles obtained were covered by an oxygen shell. It is shown that surface modifications of the covered HAp by Ti result in better mechanical properties, reducing the possible damage to the HAp ceramic by friction or impacts as it often happens in meniscus, bone junctions and the inclusion of prosthesis for human treatments. |
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