Tribological behaviour of nanostructured Al<sub>2</sub>O<sub>3</sub> coatings

Singh, Vinay Pratap; Sil, Anjan; Jayaganthan, R.

doi:10.1179/1743294411y.0000000076

Cited by 19 publications

(9 citation statements)

References 26 publications

(44 reference statements)

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“…To perform the tribological tests and consequently analyze the coefficient of friction of a porous zirconia structure against bovine bone, a 3 N load was selected, once, the loads typically found in the literature for assessing the tribological behavior of porous ceramics range from 1 to 15 N …”

Section: Resultsmentioning

confidence: 99%

Sliding behavior of zirconia porous implant surfaces against bone

et al. 2018

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Different zirconia porous layers were produced on zirconia dense zirconia substrates by slip casting using powder with different mean sizes: 40 μm (Z40), 70 μm (Z70), and 100 μm (Z100). The dynamic and static coefficients of friction against bovine femoral bone, mimicking the implantation process, were conducted using a ball-on-flat reciprocating sliding tribometer under 3 N of normal load. Additionally, the porous layers were assessed with regard to their low temperature degradation (aging). Results revealed that the porous layers were able to keep their integrity during the sliding testes against bone, with no zirconia particles being transferred to the bone. Results did not show significant differences (p > 0.05) in kinetic and static COF values for Z40, Z70, Z100, and GRAD specimens, ranging from 0.53 to 0.77 and 0.65 to 0.90, respectively. The aging tests revealed that all surfaces were prone to low temperature degradation (~49% of monoclinic content after 18 h). In conclusion, the cohesive integrity of the layers and relatively high COF observed reveled that zirconia porous layers may be considered for replacing the current implant surfaces, and are expected to improve their primary stability. © 2018 Wiley Periodicals, Inc. J. Biomed. Mater. Res. Part B, 2018.

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Section: Resultsmentioning

confidence: 99%

Sliding behavior of zirconia porous implant surfaces against bone

et al. 2018

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“…SE resistance was enhanced with nano-structured alumina coating due to higher hardness and conducive impediment of crack spread. 128 Similarly, three HVOF deposited coatings of cermet (WC-10Co-4Cr) with its conventional, nano-structured and modified (0.4%, multi-walled carbon nano tubes) nano-structured powder were obtained on AISI304 stainless steel and examined. SE resistance was found to be increased with reduced size powder particles of cermet after transforming its conventional to nano structured form.…”

Section: Part-i (Effect Of Coating and Reinforcement On Se Performance)mentioning

confidence: 99%

Insights to improve the tribo-performance of materials used under slurry erosion applications: A review

Yadav

Singh²

2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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Slurry erosion usually results in the form of damage to the materials of different components having underwater working domain. Numerous industries have suffered due to this kind of wear resulting in frequent breakdowns demanding repeated financial assistance and poor productivity. Properties and tribo-performance of materials related to distinct slurry applications play a significant role in arresting the slurry erosion wear. Slurry erosion depends on different parameters such as impact velocity, impingement angle, shape and size of erodent, slurry concentration and so on. These parameters differ from one application to another and accordingly, specific materials are selected knowing the extent and severity of slurry erosion wear. In the last decade, many authors studied parametrically the tribo-slurry erosion performance of materials, few of them correlated their investigations to the actual in situ conditions of applications. Various authors have analyzed the effect of operating parameters on the mechanism of erosion and conducted the comparative studies of different materials. Many of the investigators attempted to improve the properties and tribo-slurry erosion performance of materials through surface modification techniques; coating, reinforcement, heat treatment, thermo-mechanical process etc. This review is an effort to covers all such kind of explorations.

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“…Many researchers have recently worked on ceramics coatings for hydro dynamic conditions. Many coatings are developed to protect the turbine steel which includes PS and HVOF Cr 2 O 3 -50%Al 2 O 3 [30], HVOF Cr 2 O 3 [31], PS Cr 2 O 3 [32], HVOF Al 2 O 3 -TiO 2 [33], and nano-structured Al 2 O 3 [34].…”

Section: Introductionmentioning

confidence: 99%

Neural Computing of Erosion Assessment in Al-20TiO2 HVOF Thermal Spray Coating

Singh

Vasudev

Szala

et al. 2023

Preprint

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Stainless steel (SS) 316L is widely used for hydraulic machinery of ash disposal slurry pump. In this work, the Al-20TiO2 coating powders were sprayed on SS316L materials using HVOF technique. The various properties such as erosion resistance, microhardness, microstructure, roughness, etc. were tested during the experiments. A pot tester was used to examine the rate of erosion. At an impact angle of 60 degrees, Al-20TiO2 coatings were found to erode the most. The neural computing was performed by using the artificial neural network model (ANN). Present ANN model produced the Pearson coefficient (R) of 0.99903, 0.99301, and 0.99194 respectively for training, validation and testing. The overall R value of model was found as 0.99686. Microscopically, Al-20TiO2 demonstrated semi-brittle erosion behavior. Craters and ductile fractures were the most common erosion wear mechanisms detected on the Al-20TiO2 coating, indicating that this material had semi-ductile properties.

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Tribological behaviour of nanostructured Al₂O₃ coatings

Cited by 19 publications

References 26 publications

Sliding behavior of zirconia porous implant surfaces against bone

Sliding behavior of zirconia porous implant surfaces against bone

Insights to improve the tribo-performance of materials used under slurry erosion applications: A review

Neural Computing of Erosion Assessment in Al-20TiO2 HVOF Thermal Spray Coating

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Tribological behaviour of nanostructured Al2O3 coatings

Cited by 19 publications

References 26 publications

Sliding behavior of zirconia porous implant surfaces against bone

Sliding behavior of zirconia porous implant surfaces against bone

Insights to improve the tribo-performance of materials used under slurry erosion applications: A review

Neural Computing of Erosion Assessment in Al-20TiO2 HVOF Thermal Spray Coating

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Tribological behaviour of nanostructured Al₂O₃ coatings