Effect of shot peening on electrophoretic deposition of bioactive glass coating on AISI 316L stainless steel

Samani, Fahimeh Yazdani; Rabiee, Sayed Mahmood; Jamaati, Roohollah; Bagherifard, Sara

doi:10.1016/j.ceramint.2023.02.114

Cited by 4 publications

(3 citation statements)

References 30 publications

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“…These results show that the galvanic method yields coatings with good corrosion resistance properties, which are better than those obtained through electrodeposition [109] and electrophoretic deposition [110]. However, it is worth noting that a direct comparison with other results is difficult to achieve.…”

Section: Resultsmentioning

confidence: 78%

Galvanic Deposition of Calcium Phosphate/Bioglass Composite Coating on AISI 316L

et al. 2023

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Calcium phosphate/Bioglass composite coatings on AISI 316L were investigated with regard to their potential role as a beneficial coating for orthopedic implants. These coatings were realized by the galvanic co-deposition of calcium phosphate compounds and Bioglass particles. A different amount of Bioglass 45S5 was used to study its effect on the performance of the composite coatings. The morphology and chemical composition of the coatings were investigated before and after their aging in simulated body fluid. The coatings uniformly covered the AISI 316L substrate and consisted of a brushite and hydroxyapatite mixture. Both phases were detected using X-ray diffraction and Raman spectroscopy. Additionally, both analyses revealed that brushite is the primary phase. The presence of Bioglass was verified through energy-dispersive X-ray spectroscopy, which showed the presence of a silicon peak. During aging in simulated body fluid, the coating was subject to a dynamic equilibrium of dissolution/reprecipitation with total conversion in only the hydroxyapatite phase. Corrosion tests performed in simulated body fluid at different aging times revealed that the coatings made with 1 g/L of Bioglass performed best. These samples have a corrosion potential of −0.068V vs. Ag/AgCl and a corrosion current density of 8.87 × 10−7 A/cm2. These values are better than those measured for bare AISI 316L (−0.187 V vs. Ag/AgCl and 2.52 × 10−6 A/cm2, respectively) and remained superior to pure steel for all 21 days of aging. This behavior indicated the good protection of the coating against corrosion phenomena, which was further confirmed by the very low concentration of Ni ions (0.076 ppm) released in the aging solution after 21 days of immersion. Furthermore, the absence of cytotoxicity, verified through cell viability assays with MC3T3-E1 osteoblastic cells, proves the biocompatibility of the coatings.

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Section: Resultsmentioning

confidence: 78%

Galvanic Deposition of Calcium Phosphate/Bioglass Composite Coating on AISI 316L

et al. 2023

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“…Water contact angle tests were conducted to further verify the surface roughness of CCMs. When the contact angle is less than 90°, an increased roughness will lead to higher wettability 49 . It can be seen from Figure 6 that the contact angles of C1‐C6 are 25°, 38.6°, 26.2°, 25.6°, 24.6° and 22.3°, respectively.…”

Section: Resultsmentioning

confidence: 98%

Rational design of moldable calcium chloride ceramic‐like material with supramolecular structure

et al. 2023

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Calcium chloride is widely used in various fields of society because of its good chemical stability and non‐toxic properties. As an inorganic salt with low ductility at low temperature, it is never used to prepare bulk materials but is usually used to prepare energy storage materials. The work in this paper presents the first synthesis of a moldable calcium chloride ceramic‐like material (flexural strength up to 32 MPa) using calcium chloride. The process results in occurring ion‐dipole interactions between calcium chloride and glycerol by means of direct heating and forms supramolecular structure. Due to the presence of dynamic and reversible non‐covalent bonds, the bonds break upon heating bringing good flowability; the re‐established bonds upon cooling allow the formation of rigid materials. The preparation is also a green and recyclable process, as the molded material can be reshaped by heating. Such a brilliant moldable property reveals the potential of this new approach for the design and production of calcium chloride materials with adjustable shapes.

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“…It has been shown that the passive layer depends heavily on the microstructural features (e.g., grain size, grain boundary ratio, amount of dislocation, etc.) [31,49]. The formation and growth of the passive layer on the surface of titanium and its alloys can be found elsewhere [50].…”

Section: Discussionmentioning

confidence: 99%

Corrosion Behavior of Shot-Peened Ti6Al4V Alloy Produced via Pressure-Assisted Sintering

Avcu,

Abakay,

Yıldıran Avcu

et al. 2023

Coatings

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For the first time, the present study investigates the corrosion, surface, and subsurface properties of a shot-peened Ti6Al4V powder metallurgical alloy produced via pressure-assisted sintering. Shot peening yielded a fine-grained microstructure beneath the surface down to 100 microns, showing that it caused severe plastic deformation. XRD analysis revealed that the sizes of the crystallites in unpeened and shot-peened Ti6Al4V alloy samples were 48.59 nm and 27.26 nm, respectively, indicating a substantial reduction in crystallite size with shot peening. Cross-sectional hardness maps of shot-peened samples showed a work-hardened surface layer, indicating a ~17% increase in near-surface hardness relative to unpeened samples. Three-dimensional surface topographies showed that shot peening yielded uniform peaks and valleys, with a maximum peak height of 4.83 μm and depth of 6.56 μm. With shot peening, the corrosion potential shifted from −0.386 V to −0.175 V, showing that the passive layer developed faster and was more stable than the unpeened sample, improving corrosion resistance. As determined via XRD analysis, the increased grain refinement (i.e., the number of grain boundaries) and the subsequent accumulation of TiO2 and Al5Ti3V2 compounds through shot peening also suggested the effective formation of a protective passive layer. As demonstrated via electrochemical impedance spectroscopy, the formation of this passive film improved the corrosion resistance of the alloy. The findings will likely advance surface engineering and corrosion research, enabling safer and more productive shot peening in corrosion-critical applications.

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Effect of shot peening on electrophoretic deposition of bioactive glass coating on AISI 316L stainless steel

Cited by 4 publications

References 30 publications

Galvanic Deposition of Calcium Phosphate/Bioglass Composite Coating on AISI 316L

Galvanic Deposition of Calcium Phosphate/Bioglass Composite Coating on AISI 316L

Rational design of moldable calcium chloride ceramic‐like material with supramolecular structure

Corrosion Behavior of Shot-Peened Ti6Al4V Alloy Produced via Pressure-Assisted Sintering

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