Influence of Alkali Treatment on Anodized Titanium Alloys in Wollastonite Suspension

Abstract

Abstract:The surface modification of titanium alloys is an effective method to improve their biocompatibility and tailor the material to the desired profile of implant functionality. In this work, technologically-advanced titanium alloys-Ti-15Mo, Ti-13Nb-13Zr and Ti-6Al-7Nb-were anodized in suspensions, followed by treatment in alkali solutions, with wollastonite deposition from the powder phase suspended in solution. The anodized samples were immersed in NaOH or KOH solution with various concentrations with a different set of temperatures and exposure times. Based on their morphologies (observed by scanning electron microscope), the selected samples were investigated by Raman and X-ray photoelectron spectroscopy (XPS). Titaniate compounds were formed on the previously anodized titanium surfaces. The surface wettability significantly decreased, mainly on the modified Ti-15Mo alloy surface. Titanium alloy compounds had an influence on the results of the titanium alloys' surface modification, which caused the surfaces to exhibit differential physical properties. In this paper, we present the influence of the anodization procedure on alkali treatment effects and the properties of obtained hybrid coatings.

Plasma Electrolytic Oxidation of Metals and Alloys

“…The present Special Issue covers 10 papers: Six articles [1][2][3][4][5][6] discuss the Plasma Electrolytic Oxidation PEO of titanium [2,4,6] and its alloys [1,3,5], two papers talk about the PEO processing of aluminum alloys [7] and composites [8], and one on magnesium alloys [9]. The tenth paper is a review regarding soft sparking issues in PEO [10].…”

“…Technologically advanced two-and three-component titanium alloys-Ti-15Mo, Ti-13Nb-13Zr and Ti-6Al-7Nb-were anodized in suspensions, followed by treatment in alkali solutions by Kazek-Kęsik et al [1]. After anodizing, the samples were immersed in NaOH or KOH solution with various concentrations and different process parameters.…”

“…After anodizing, the samples were immersed in NaOH or KOH solution with various concentrations and different process parameters. The purpose of such processing was to enhance metal surface bioactivity, cytocompatibility, and antibacterial properties [1]. The reported techniques were used for titanium alloy surface modification in view of obtaining a functional biomaterial surface for medical applications.…”

“…Differing from Ti-6Al-4V alloy, which has been routinely used in medicine, these new and advanced titanium alloys do not include vanadium. They are characterized by low Young's modulus and biocompatible alloy elements, and after PEO treatment may be used for medical applications, such as promising metallic implants to bone [1][2][3][4][5][6].…”

Alkali Treatment of Anodized Titanium Alloys Affects Cytocompatibility

“…Titanium alloys Ti-15Mo, Ti-13Nb-13Zr, and Ti-6Al-7Nb (BIMO Metals, Wroclaw, Poland) were anodized and alkali-treated according to the procedure, which is presented in detail in [26]. The condition to obtain the most favorable microstructure and chemical composition for materials, which may find application for dental implants, was determined.…”