Microstructure and wear performance of alumina/graphene coating on textured Al2O3/TiC substrate composites

Liu, Changxia; Sun, Jianlin; Venturi, Federico; Romero, Acacio Rincon; Hussain, Tanvir

doi:10.1016/j.jeurceramsoc.2020.09.063

Cited by 21 publications

(15 citation statements)

References 59 publications

(75 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…C-600 shows a typical lamellar structure (Figure 8e,f) due to the heavy deformation of the molten and partly molten powder during the deposition process. The deformation of droplets and the bonding between splats improved with the power, which is beneficial to the formation of a denser coating [45]. There were few pores in C-600 with a porosity of 1.94% compared to 9.26% of C-500 and 6.42% of C-550.…”

Section: Microstructure Of the Plasma-sprayed Moalb Coatingsmentioning

confidence: 97%

“…Moreover, microcracks can be found in C-500 as a result of th stress generated during deposition due to the inconsistent melting state of parti number of pores in C-550 significantly reduced, but unmelted particles and mic were still present. C-600 shows a typical lamellar structure (Figure 8e,f) due to th deformation of the molten and partly molten powder during the deposition proc deformation of droplets and the bonding between splats improved with the powe is beneficial to the formation of a denser coating [45]. There were few pores in Ca porosity of 1.94% compared to 9.26% of C-500 and 6.42% of C-550.…”

Section: Microstructure Of the Plasma-sprayed Moalb Coatingsmentioning

confidence: 99%

See 1 more Smart Citation

Microstructure and Wear Behaviors of Plasma-Sprayed MoAlB Ceramic Coating

Sun

et al. 2021

Coatings

View full text Add to dashboard Cite

MoAlB ceramic coatings were prepared on a 316 steel surface by atmospheric plasma spraying with different arc power levels. The phase composition, microstructure and wear resistance of coatings against GCr15 and Si3N4 counterparts were studied. The MoAlB ceramic decomposed and was oxidized to form MoB and Al2O3 during plasma spraying. With the increase of the arc power, MoAlB experienced more decomposition, but the coatings became denser. When the arc power increased from 30 to 36 kW, the wear rates of coatings against GCr15 and Si3N4 balls reduced by 91% and 78%, respectively. The characterization of wear tracks shows that when against GCr15 counterparts, the main wear mechanisms are abrasive and adhesive wear, and when against Si3N4 counterparts, fatigue and abrasive wear are dominant. The refinement of wear resistance by increasing arc power can be attributed to the improvement of density and adhesive strength among splats.

show abstract

Section: Microstructure Of the Plasma-sprayed Moalb Coatingsmentioning

confidence: 97%

Section: Microstructure Of the Plasma-sprayed Moalb Coatingsmentioning

confidence: 99%

Microstructure and Wear Behaviors of Plasma-Sprayed MoAlB Ceramic Coating

Sun

et al. 2021

Coatings

View full text Add to dashboard Cite

show abstract

“…The ability to use finer particles such as GNPs, as well as the superior coating qualities achieved by the HVOF approach and the better tribological behaviour achieved by micro texturing, offer a potential improvement in substrate performance. In contrast to other available conventional coating techniques like plasma spray, sputtering, chemical vapour deposition, and physical vapour deposition, the HVOF approach uses powder suspension as the raw material to deposit coating with a uniform elemental distribution and micro/nano-structure, besides it is very simple to use, inexpensive, and well suited for large-scale production [16]. In recent reported articles [6,17,18], micro-texturing employing lasers could improve the tribological aspect of the coating deposited to steel substrate.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the corrosion and wear of WC-10Co-4Cr + GNPs coating applied to HSLA DH-36 steel using HVOF

Kumar¹,

Verma²,

Kumar³

2022

Surf. Topogr.: Metrol. Prop.

View full text Add to dashboard Cite

High strength low alloy (HSLA) steels offer unique properties and features that show their utility in harsh conditions. Wear and corrosion are concerns when using HSLA steel in shipbuilding and marine environment. In such harsh conditions, WC-10Co-4Cr is a suitable candidate for applying a protective coating to HSLA steel using High Velocity Oxy-Fuel (HVOF) to improve wear and corrosion resistance. The addition of graphene nano-platelets (GNPs) to WC-10Co-4Cr powder increased its mechanical qualities due to its unique properties such as low wear and excellent corrosion resistance. In this work, WC-10Co-4Cr + 3% GNP was coated on laser-treated DH-36 steel. The corrosion potential for these coatings on pre-laser textured with pitch-to-diameter ratio 1.67 was -0.437V compared to the pristine DH-36 was -0.821V; while corrosion current density was 0.143 × 10-3 & 5.362 × 10-6, respectively. Finally, the dry sliding wear test using the Pin-on-Disc (PoD) method, microhardness using the Vickers Indentor, and corrosion resistance using a potentiometer were utilised to analyse the coated surface. The wear resistance of steel coated with WC-10Co-4Cr + 3% GNPs was about 1.5 times compared to pristine substrate. Microstructure and morphology of corroded surfaces were examined using FE-SEM. The results reveal that GNPs act as a solid lubricant, improving the surface's wear resistance.

show abstract

“…High-purity and ultrafine α-Al 2 O 3 powders have an important influence on the properties of structural ceramics, functional ceramics, and electronic ceramics. [1][2][3][4] Moreover, it is well known that the application property of α-Al 2 O 3 is determined by its morphology, size, and dispersibility. Due to the characteristics of regular morphology, good mobility, high packing density, high specific surface area, and good sintering properties, spherical α-Al 2 O 3 nanoparticles have a broad application prospect in composite materials, thin films for microelectronics, integrated circuit substrates, 3D printing, and precision polishing.…”

Section: Introductionmentioning

confidence: 99%

“…High‐purity and ultrafine α‐Al 2 O 3 powders have an important influence on the properties of structural ceramics, functional ceramics, and electronic ceramics 1–4 . Moreover, it is well known that the application property of α‐Al 2 O 3 is determined by its morphology, size, and dispersibility.…”

Section: Introductionmentioning

confidence: 99%

Preparation of spherical α‐Al₂O₃ nanoparticles by microwave hydrothermal synthesis and addition of nano‐Al seeds

Wang

Mai

et al. 2022

J Am Ceram Soc.

View full text Add to dashboard Cite

Due to their special appearance, spherical α‐Al2O3 nanoparticles play an important role for obtaining high‐performance structural and functional ceramics. However, there are still problems such as easily agglomerates to form worm‐like structures at high temperatures and difficult availability of spherical nanoparticles. In this study, spherical α‐Al2O3 nanoparticles with high dispersion were prepared by a combination of a microwave hydrothermal method and an addition of nano‐Al particles as seeds. First, spherical amorphous alumina precursors were synthesized by the microwave hydrothermal method at 100°C for 30 min using Al2(SO4)3·18H2O, Al(NO3)3·9H2O, and urea, as raw materials, and then spherical α‐Al2O3 nanoparticles with a diameter of about 66 nm were acquired after calcined the precursor at 1050°C for 90 min by adding nano‐Al seeds, which reduced the calcination temperature by 50°C and holding time by 30 min compared to that without seeds. Kinetic analysis shows that 5 wt.% nano‐Al seeds can reduce the activation energy of crystalline transition of γ‐Al2O3 to α‐Al2O3 from 516.51 to 474.37 kJ/mol. Moreover, the microscopic mechanism of nano‐Al particles as seeds was investigated. The characterizations of sintering properties show that spherical α‐Al2O3 nanoparticles facilitate the acquisition of uniform microstructure for resulting ceramic and the fracture modes include both intergranular and transgranular fractures.

show abstract

Microstructure and wear performance of alumina/graphene coating on textured Al2O3/TiC substrate composites

Cited by 21 publications

References 59 publications

Microstructure and Wear Behaviors of Plasma-Sprayed MoAlB Ceramic Coating

Microstructure and Wear Behaviors of Plasma-Sprayed MoAlB Ceramic Coating

Analysis of the corrosion and wear of WC-10Co-4Cr + GNPs coating applied to HSLA DH-36 steel using HVOF

Preparation of spherical α‐Al₂O₃ nanoparticles by microwave hydrothermal synthesis and addition of nano‐Al seeds

Contact Info

Product

Resources

About

Microstructure and wear performance of alumina/graphene coating on textured Al2O3/TiC substrate composites

Cited by 21 publications

References 59 publications

Microstructure and Wear Behaviors of Plasma-Sprayed MoAlB Ceramic Coating

Microstructure and Wear Behaviors of Plasma-Sprayed MoAlB Ceramic Coating

Analysis of the corrosion and wear of WC-10Co-4Cr + GNPs coating applied to HSLA DH-36 steel using HVOF

Preparation of spherical α‐Al2O3 nanoparticles by microwave hydrothermal synthesis and addition of nano‐Al seeds

Contact Info

Product

Resources

About

Preparation of spherical α‐Al₂O₃ nanoparticles by microwave hydrothermal synthesis and addition of nano‐Al seeds