Electrophoretic deposition and reaction-bond sintering of Al2O3/Ti composite coating: evaluation of microstructure, phase and wear resistance

Mahmoudi, M.; Maleki-Ghaleh, H.; Kavanlouei, Majid

doi:10.1007/s12034-015-0882-3

Cited by 12 publications

(6 citation statements)

References 22 publications

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“…Sintering at high temperatures (1,200°C) could cause the HA coating decomposition on the metal substrate . While the insufficient low‐temperature results in a low mechanical strength as well as the chemical instability of coating . To overcome the temperature limitation in the sintering process, introducing a second phase in the HA matrix that induces the bonding reactions between coating particles, could be an operational approach .…”

Section: Introductionmentioning

confidence: 99%

“…[11] While the insufficient low-temperature results in a low mechanical strength as well as the chemical instability of coating. [18,19] To overcome the temperature limitation in the sintering process, introducing a second phase in the HA matrix that induces the bonding reactions between coating particles, could be an operational approach. [20][21][22] This originates from the high tendency of the second phase (ie, aluminum) to diffuse into the HA particles.…”

Section: Introductionmentioning

confidence: 99%

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Effect of hydroxyapatite‐titanium‐MWCNTs composite coating fabricated by electrophoretic deposition on corrosion and cellular behavior of NiTi alloy

Maleki-Ghaleh

Khalil‐Allafi

2019

Materials & Corrosion

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In this study, the hydroxyapatite (HA)‐titanium (Ti, 20 wt.%) multiwalled carbon nanotubes (MWCNTs, 1 wt.%) composite coating was applied on the NiTi alloy by using the electrophoretic deposition (EPD) technique. The morphologies and the phase structures of the coatings were investigated by the FESEM and XRD analysis, respectively. The corrosion behaviors of the coated NiTi samples were investigated using the polarization and electrochemical impedance spectroscopy tests in a simulated body fluid (SBF). The amounts of the released Ni ions from the coated NiTi were studied in the SBF. The results of the electrochemical tests revealed the corrosion resistance of the NiTi coated with HA was further improved by the addition of the Ti and MWCNTs to the HA coating. The current density and corrosion resistance of the NiTi alloy changed from 2.52 μA.cm−2 and 24.13 kΩ to 0.91 nA.cm−2 and 5.92 MΩ after coated with the HA‐Ti‐MWCNTs composite coating. Also, the number of nickel ions released from the surface of the NiTi alloy to the SBF medium suppressed from 11.8 to 0.08 μgr.L−1, after coating with HA‐Ti‐MWCNTs. Also, the cellular proliferation in the culture medium consisting of the NiTi alloy coated with the HA‐Ti‐MWCNTs improved significantly (compared with that of the NiTi alloy) as shown no toxicity in the cell culture medium.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of hydroxyapatite‐titanium‐MWCNTs composite coating fabricated by electrophoretic deposition on corrosion and cellular behavior of NiTi alloy

Maleki-Ghaleh

Khalil‐Allafi

2019

Materials & Corrosion

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“…Reaction between the secondary phase and matrix at low temperatures is known as a bonding reaction (Mahmoudi, Maleki‐Ghaleh, & Kavanlouei, ; Wang et al, ). These reactions can form a chemical bond between the coating particles (due to the diffusion of atoms on the surface of the particles in the coating) (Wang, Shemilt, & Xiao, ).…”

Section: Introductionmentioning

confidence: 99%

Structural characterization, mechanical, and electrochemical studies of hydroxyapatite‐titanium composite coating fabricated using electrophoretic deposition and reaction bonding process

et al. 2019

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In the present work, hydroxyapatite (HA)-titanium (Ti, 20 wt%) composite coating was coated on NiTi alloy substrate by EPD (electrophoretic deposition) process.Before applying the coating, the HA powder was composed with Ti powder using a ball milling process. Influence of the ball milling time on morphology and phase structure of HA-Ti powder was evaluated using TEM and XRD analysis. After composing the HA particles with Ti, the HA-Ti composite powders were coated on the NiTi substrate by the EPD process in an n-butanol medium for 2 min, with the applied voltage of 60 V. XRD and SEM analysis were utilized to evaluate the phase analysis and morphology of the coatings. Mechanical and electrochemical characteristic of the coatings were also assessed using the micro-indentation, micro-scratch, and polarization tests, respectively. The results revealed that the milling process time had a significant influence on reaction bonds and optimum mixing time was 4 hr. Micro-hardness of the HA-Ti composite coating (304 HV) was substantially higher than the HA coating (72 HV). Also, as the HA coating was composed with Ti particles, the amount of force (in the micro-scratch test) required for detaching the coating from the NiTi substrate increased from 7.1 to 17.8 N. The polarization results showed that the HA-Ti composite coating had a higher electrochemical resistance compared with the HA coating. Corrosion resistance of the NiTi alloy coated with HA increased from 133 kΩ. cm 2 to 2,720 kΩ.cm 2 after composed with the Ti particles.

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“…Another investigation on the reactive bonding was performed by Mahmudi et al. 26,27 where they studied the Al 2 O 3 /Ti composite coatings.…”

Section: Introductionmentioning

confidence: 99%

“…They found that the presence of Al compensated the volume shrinkage of green coatings and also promoted the adherence of the coatings to the metal substrate. Another investigation on the reactive bonding was performed by Mahmudi et al 26,27 where they studied the Al 2 O 3 /Ti composite coatings.…”

Section: Introductionmentioning

confidence: 99%

An investigation on the properties of YSZ/Al₂O₃ nanocomposite coatings on Inconel by electrophoretic deposition

Khanali

Ariaee

Rajabi

et al. 2017

Journal of Composite Materials

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Nanostructure yttria-stabilized zirconia (nano-YSZ) /Al2O3 composite coatings were deposited on Inconel super-alloy substrates by electrophoretic deposition. Aluminum and nano-YSZ particles were utilized for reaction bonding at high temperatures. After aluminum oxidation at 650℃, sintering process was carried out at temperature ranges of 1100–1250℃. It was found that the presence of aluminum in the green coatings improves bonding and also compensates for the coatings’ volume shrinkage during sintering. The average crystallite sizes for all sintering temperatures were laid on a nanometric scale. Crystallite sizes of various YSZ/Al2O3 nanocomposite coatings were calculated via Scherer’s formula and the measures were in a reasonable agreement with the field-emission scanning electron microscopic results. The average grain size increased from 52.4 nm at 1100℃ for YSZ, to 68.3 nm at 1250℃ for YSZ/Al2O3 nanocomposite coatings. The nanocomposite coatings, which sintered at 1250℃ for 4 h exhibited an optimized self-crack healing capacity with lesser microcrack content.

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Electrophoretic deposition and reaction-bond sintering of Al2O3/Ti composite coating: evaluation of microstructure, phase and wear resistance

Cited by 12 publications

References 22 publications

Effect of hydroxyapatite‐titanium‐MWCNTs composite coating fabricated by electrophoretic deposition on corrosion and cellular behavior of NiTi alloy

Effect of hydroxyapatite‐titanium‐MWCNTs composite coating fabricated by electrophoretic deposition on corrosion and cellular behavior of NiTi alloy

Structural characterization, mechanical, and electrochemical studies of hydroxyapatite‐titanium composite coating fabricated using electrophoretic deposition and reaction bonding process

An investigation on the properties of YSZ/Al₂O₃ nanocomposite coatings on Inconel by electrophoretic deposition

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Electrophoretic deposition and reaction-bond sintering of Al2O3/Ti composite coating: evaluation of microstructure, phase and wear resistance

Cited by 12 publications

References 22 publications

Effect of hydroxyapatite‐titanium‐MWCNTs composite coating fabricated by electrophoretic deposition on corrosion and cellular behavior of NiTi alloy

Effect of hydroxyapatite‐titanium‐MWCNTs composite coating fabricated by electrophoretic deposition on corrosion and cellular behavior of NiTi alloy

Structural characterization, mechanical, and electrochemical studies of hydroxyapatite‐titanium composite coating fabricated using electrophoretic deposition and reaction bonding process

An investigation on the properties of YSZ/Al2O3 nanocomposite coatings on Inconel by electrophoretic deposition

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An investigation on the properties of YSZ/Al₂O₃ nanocomposite coatings on Inconel by electrophoretic deposition