Coating of different silica sources containing hydroxyapatite for Ti6Al4V metal substrate using HVOF technique
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ICCESEN 2017
Coating of different silica sources containing hydroxyapatite for Ti6Al4V metal substrate using HVOF technique Atilla Evcin 1
&
Betül Gökçen Bohur 1
Received: 23 April 2018 / Accepted: 1 February 2019 / Published online: 16 March 2019 # Saudi Society for Geosciences 2019
Abstract Biomaterials have been used to replace or support the human organs or tissues in many years. Titanium and its alloys are metallic biomaterials which bond strongly with bone and are compatible with the surrounding tissue. Hydroxyapatite (HAp:Ca10(P04)6(OH)2) is a calcium phosphate–based bioceramics and mostly used in coating of metallic biomaterials. In this study, HAp and bioactive glass powders were successfully prepared by sol-gel method. Diatomite, quartz sand, and bioactive glass were selected as SiO2 sources. Then, different SiO2 source–added HAp bioceramics were coated on Ti6AI4V metal substrate by HVOF method. Then, the characterization of the coatings was investigated. Thermal analysis of HAp powders was characterized by using TG-DSC. Mineralogical analysis of the coating material was performed by using XRD. Thicknesses and morphological analysis of the coating were done by SEM. According to the TG results, the total weight loss of HAp powers is 11.44% in the 100–1000 °C range. The characteristic peaks of HAp (2θ = 26° and 32°) were observed for pure HAp and doped HAp powders. Tricalcium phosphate (TCP) as secondary phases was detected in doped HAp powders. Pure HAp coating thickness was 186 μm. The thickness of coating decreased with additive as pure HAp. Keywords Bioceramics . Hydroxyapatite . Diatomite . Implant . Sol-gel . Coating . HVOF PACS 87.85.jj . 81.20.Fw . 52.77.Fv . 81.15.Rs
Introduction Biomaterials are defined as natural or synthetic materials that can be implanted to replace or repair missing tissue (Donglu 2005; Evcin and Büyükleblebici 2019). Biomaterials can be classified into metals, ceramics, polymers, and composites (Alizadeh-Osgouei et al. 2019). Calcium phosphate (CaP)–based bioceramics has proved to be attractive materials for biomedical applications. CaP bioceramics are commonly utilized as bone substitutes in biomedical applications. They have This article is part of the Topical Collection on Geo-Resources-EarthEnvironmental Sciences * Atilla Evcin [email protected] 1
Material Science and Engineering Department, Afyon Kocatepe University, 03200 Afyon, Turkey
biocompatibility and chemical stability and compositional similarity to the bone. Among these, particular attent i o n h a s b e e n g i v e n to h y d r o x y a p a t i t e ( H A p ) , Ca 10 (PO 4 ) 6 (OH) 2 (Zhou et al. 2018; Miranda et al. 2019; Ak Azem et al. 2016; Demirkol 2017). The HAp coatings on metallic surfaces have been presented to improve bonding strength in orthopedic implants. In literature, HAp coatings containing foreign ions such as Mg, Si (Huang et al. 2011), Sr (Supova 2015), Zn (Hong et al. 2010), and Mn (György et al. 2004) have improved the cell proliferation (Graziani et al. 2017; Robles-Águila et al. 2017;
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