Lowering the sintering temperature for EPD coatings by applying reaction bonding

Baufeld, Bernd; Biest, Omer Van der; Rätzer‐Scheibe, H.‐J.

doi:10.1016/j.jeurceramsoc.2007.11.019

Cited by 26 publications

(11 citation statements)

References 22 publications

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“…The low cost, simplicity of the process, and the high quality of the EPD coating have expedited its commercialization for applying ceramic coatings on metal substrates (Besra & Meilin, ; Boccaccini, Keim, Ma, Li, & Zhitomirsky, ). Nonetheless, the low mechanical strength of the EPD ceramic coatings has remained a major weakness (Baufeld, Van der Biest, & Rätzer‐Scheibe, ). Lack of chemical bonds (covalent bonds) between coating particles is the root of the low mechanical properties in the EPD coatings (Baufeld et al, ).…”

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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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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“…Ceramic coatings are widely used for protection against wear, oxidation and corrosion. The frequently used ceramic coating is yttria stabilized zirconia (YSZ) due to its excellent mechanical properties such as high bending strength and fracture toughness [1].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Electrophoretic Deposition of YSZ

Oskay

Demirel

2018

Acta Phys. Pol. A

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Electrophoretic deposition has acquired increasing interest for its outstanding potential to produce thick ceramic coatings on complex-shaped substrates. This makes electrophoretic deposition a promising technique to obtain ceramic coatings for several applications such as solid oxide fuel cells, thermal barrier coatings and biomaterials. Response surface methodology was used to model and optimize the electrophoretic deposition process. Three mathematical models were derived to understand the kinetics of electrophoretic deposition. The optimization results showed that applied voltage had significant effects on the packing density of YSZ particles.

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“…Also, volume shrinkage of the coatings during sintering process may result in crack formation. 18,19 In order to vanquish those disadvantages of high sintering temperatures, reaction bonding technique can be used alternatively in some cases. 20 The combined use of EPD and reaction bonding process can facilitate fabrication of dense crack-free coatings; and reduce the sintering temperatures to lower than usual ones.…”

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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Lowering the sintering temperature for EPD coatings by applying reaction bonding

Cited by 26 publications

References 22 publications

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

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

Optimization of Electrophoretic Deposition of YSZ

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

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Lowering the sintering temperature for EPD coatings by applying reaction bonding

Cited by 26 publications

References 22 publications

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

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

Optimization of Electrophoretic Deposition of YSZ

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

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Product

Resources

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