Corrosion behaviour of porous titanium–graphite composites designed for surgical implants

Blackwood, Daniel John; Chua, Alvin Wen Choong; Seah, K.H.W.; Thampuran, R.; Teoh, Swee Hin

doi:10.1016/s0010-938x(99)00103-1

Cited by 130 publications

(82 citation statements)

References 16 publications

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“…OCP for the SGG1/PEEK coated specimen obtained the value of À0.30 V. The observed shift in OCP to positive values for the SGG1/ PEEK coated alloy may indicate a reduction in the driving force for the corrosion process. [43] Thus, the obtained results suggest that the SGG1/PEEK coating has improved its corrosion behavior in comparison with the uncoated one. The examined materials are characterized by similar potentiodynamic polarization curves ( Figure 13(b)).…”

Section: Corrosion Resistancementioning

confidence: 69%

Electrophoretic Deposition, Microstructure, and Corrosion Resistance of Porous Sol–Gel Glass/Polyetheretherketone Coatings on the Ti-13Nb-13Zr Alloy

Moskalewicz

Zych

Łukaszczyk

et al. 2017

Metall Mater Trans A

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In this study, microporous composite sol-gel glass/polyetheretherketone (SGG/PEEK) coatings were produced on the Ti-13Nb-13Zr titanium alloy by electrophoretic deposition. Coatings with different levels of high open porosity were developed by introducing SGG particles of varying diameters into the PEEK matrix. The microstructure of the coatings was characterized by electron microscopy and X-ray diffractometry. The coatings with 40-50 lm thickness were composed of semicrystalline SGG particles consisting of hydroxyapatite, CaSiO 3 , some Ca 2 SiO 4 , and an amorphous phase containing Ca, Si, P, and O, homogeneously embedded in a semicrystalline PEEK matrix. The size of SGG particles present in the coatings strongly influenced the formation of microcracks and their adhesion to the underlying substrate. Microscratch tests showed that the coating containing SGG particles with a diameter smaller than 45 lm and open porosity of 45 pct exhibited good adhesion to the titanium alloy substrate, much better than the coating containing particles with a diameter smaller than 85 lm and total open porosity equal to 48 pct. The corrosion resistance was investigated in Ringer's solution at a temperature of 310 K (37°C) for a pH equal to 7.4 and in deaerated solutions with the use of open-circuit potential, potentiodynamic polarization, and electrochemical impedance spectroscopy. The SGG/PEEK-coated alloy indicated better electrochemical corrosion resistance compared with the uncoated alloy.

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Section: Corrosion Resistancementioning

confidence: 69%

Electrophoretic Deposition, Microstructure, and Corrosion Resistance of Porous Sol–Gel Glass/Polyetheretherketone Coatings on the Ti-13Nb-13Zr Alloy

Moskalewicz

Zych

Łukaszczyk

et al. 2017

Metall Mater Trans A

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“…29,[32][33][34] Also, all E oc values of ternary Ti-6Al-4V alloy have more electronegative values than of quaternary Ti-6Al-4V-1Zr alloy, pointing out a more stable passive state for the new alloy, due to the passive ZrO 2 oxide 10,22 that is presented in the passive layer.…”

Section: Improvement Of Corrosion Resistance From In Time Variations mentioning

confidence: 94%

Corrosion resistance improvement of titanium base alloys

Popa¹,

Vasilescu²,

Drob³

et al. 2010

Quím. Nova

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Recebido em 4/2/10; aceito em 2/6/10; publicado na web em 24/8/10The corrosion resistance of the new Ti-6Al-4V-1Zr alloy in comparison with ternary Ti-6Al-4V alloy in Ringer-Brown solution and artificial Carter-Brugirard saliva of different pH values was studied. In Ringer-Brown solution, the new alloy presented an improvement of all electrochemical parameters due to the alloying with Zr; also, impedance spectra revealed better protective properties of its passive layer. In Carter-Brugirard artificial saliva, an increase of the passive film thickness was proved. Fluoride ions had a slight negative influence on the corrosion and ion release rates, without to affect the very good stability of the new Ti-6Al-4V-1Zr alloy.

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“…7,8) One way to alleviate the problem is to reduce Young's modulus of pure Ti by introducing pores, thereby minimizing damages to tissues adjacent to the implant. 8,9) Recently, Oh et al have measured Young's modulus of porous Ti compacts which have various porosities, fabricated by several sintering conditions. 8) They reported that Young's modulus of porous Ti compacts with porosity of 32-35 vol% is similar to that of human bone.…”

Section: Introductionmentioning

confidence: 99%

Microstructures and Mechanical Properties of Porosity-Graded Pure Titanium Compacts

Segawa

Nomura

et al. 2003

Mater. Trans.

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Microstructures and mechanical properties of porosity-graded Ti compacts were investigated in this study. To fabricate the porositygraded compacts, Ti powders with three different particle sizes, 65, 189 and 374 mm were prepared by the plasma rotating electrode process (PREP) and the gas atomization process, and these powders were sintered with and without applied stress. Porosity and pore size of porositygraded Ti compacts decrease significantly with decreasing initial powder size and by applying stress. The most porous layer (374 mm) is severely deformed in compression tests compared to other layers. The compressive strength of porosity graded-compacts is found to be in fairly good agreement with the strength of most porous layer. Bend strength of compact sintered at 1223 K and 1 MPa (223.3 MPa) shows a higher value than that of human bone (156.9 MPa).

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Corrosion behaviour of porous titanium–graphite composites designed for surgical implants

Cited by 130 publications

References 16 publications

Electrophoretic Deposition, Microstructure, and Corrosion Resistance of Porous Sol–Gel Glass/Polyetheretherketone Coatings on the Ti-13Nb-13Zr Alloy

Electrophoretic Deposition, Microstructure, and Corrosion Resistance of Porous Sol–Gel Glass/Polyetheretherketone Coatings on the Ti-13Nb-13Zr Alloy

Corrosion resistance improvement of titanium base alloys

Microstructures and Mechanical Properties of Porosity-Graded Pure Titanium Compacts

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