Microstructural Analysis and Tribological Behavior of Ti-Based Alloys with a Ceramic Layer Using the Thermal Spray Method

Coatings

Madalina Simona Baltatu¹  Andrei Victor Sandu¹  Petrica Vizureanu¹  Corneliu Munteanu²  Bogdan Istrate² 

[1] Department of Technologies and Equipments for Materials Processing, Faculty of Materials Science and Engineering, Gheorghe Asachi Technical University of Iaşi, Boulevard D. Mangeron, No. 51, 700050 Iasi, Romania;Mechanical Engineering, Mechatronics and Robotics Department, Mechanical Engineering Faculty, Gheorghe Asachi Technical University of Iaşi, Boulevard D. Mangeron, No. 63, 700050 Iaşi, Romania;

关键词: Ti-based alloys;    thin coatings;    atmospheric plasma spray (APS);    scanning electron microscopy (SEM);    energy-dispersive X-ray spectroscopy (EDAX);   

DOI  :  10.3390/coatings10121216

来源: DOAJ

【 摘 要 】

The present article focuses on a recently developed new system of alloys (Ti15MoSi) coated with ZrO₂. The thin coatings deposition of ZrO₂ on titanium alloys can be a solution to improve their corrosion resistance, biocompatibility, and to extend their long life with the human tissue. In order to improve the corrosion resistance, atmospheric plasma spraying coatings with zirconia have been performed. These coatings present a homogenous aspect with very few cracks. The novelty of the research is that zirconia is much stable in the simulated body fluids and presents no harm effects to the healing process of the bone. To analyze the thin coatings deposition, mechanical properties, chemical structure, and corrosion resistance were examined by a modulus of elasticity, X-ray diffraction (XRD), scanning electron microscopy-energy-dispersive X-ray spectroscopy (SEM-EDS), and linear polarization. The results reveal that Young’s modulus shows a low value (51 GPa for Ti15Mo0.5Si-ZrO₂ and 48 GPa for Ti15Mo-ZrO₂) and the XRD patterns show the presence of β-Ti and ZrO₂ phases having a tetragonal crystalline structure. The research highlighted the morphological aspect of zirconia coatings on the new alloy titanium substrate, being an adherent compact coating with significantly improved corrosion resistance. Moreover, the mechanical properties are similar to the biological bone, which will avoid the stress shielding of the implant with bone tissue.

【 授权许可】

Unknown