Water droplet impingement erosion performance of WC-based coating sprayed by HVAF and HVOF

Gujba, Abdullahi Kachalla; Mahdipoor, M.S.; Medraj, Mamoun

doi:10.1016/j.wear.2021.203904

Cited by 19 publications

(12 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The higher kinetic energy of the quartz particles caused an increase in the number of surface fragments (1) [33]. 4) and coating cracking (5). Reprinted with permission from reference [33], © 2019 Elsevier.…”

Section: Hvaf Coatings Against Slurry Erosionmentioning

confidence: 99%

“…Numerous studies so far have reported the advantages of HVAF over HVOF, such as higher deposition rate and efficiency [1], higher jet velocity [4,5], and lower spray/flame temperature [4,5]. Using compressed air instead of O2 helps to reduce flame and particle temperatures [6], assisting in maintaining raw material properties via inhibiting fine particle oxidation during spraying [4].…”

Section: Brief Introduction To Hvaf Coatingsmentioning

confidence: 99%

“…Consequently, dense, highly cohesive coatings with low porosity, and superior wear performance can be deposited via HVAF [4,6,8]. Therefore, HVAF-coatings tend to exhibit higher mechanical properties (i.e., fracture toughness, elasticity modulus, hardness, and compressive strength) than HVOF-coatings [5,9] due to the abovementioned advantages.…”

Section: Brief Introduction To Hvaf Coatingsmentioning

confidence: 99%

“…In cavitation erosion, wear occurs due to the repeated impact of cavitation bubbles under high-turbulent fluid flow [18]. Finally, water droplet erosion (not covered in the present review) occurs via progressive material removal from a surface due to the repeated impact of droplets [5]. [19], © 2015 SAGE Publications.…”

Section: Brief Introduction To Erosionmentioning

confidence: 99%

See 3 more Smart Citations

High-velocity air fuel coatings for steel for erosion-resistant applications

Avcu

Güney

Avcu

2022

J. Electrochem. Sci. Eng.

View full text Add to dashboard Cite

High-velocity air fuel (HVAF) coating processes have advantages over conventional high-velocity oxygen fuel (HVOF) processes, resulting in coatings with superior properties. The present review first provides a concise overview of HVAF coatings, highlighting their advantages over HVOF coatings. Then, the fundamentals of solid particle, slurry, and cavitation erosion are briefly introduced. Finally, the performance of HVAF coatings for erosion-resistant applications is discussed in detail. The emerging research consistently reports HVAF-coatings having higher erosion resistance than HVOF-coatings, which is attributed to their elevated hardness and density and improved microstructural features that inhibit the surface damages caused by erosion. The dominant wear mechanisms are mainly functions of particle impact angle. For instance, the removal of the binder phase at high impact angles causes the accumulation of plastic strain on hard particles (e.g., WC particles) in the matrix, forming micro-cracks between the hard particles and the matrix, eventually decreasing the erosion resistance of HVAF coatings. The binder phase of HVAF-coatings significantly affects erosion resistance, primarily due to their inherent mechanical properties and bearing capacity of hard particles. Optimizing spraying parameters to tailor the microstructural characteristics of these coatings appears to be the key to enhancing their erosion resistance. The relationship between microstructural features and erosion mechanisms needs to be clarified to process coatings with tailored microstructural features for erosion-resistant applications.

show abstract

Section: Hvaf Coatings Against Slurry Erosionmentioning

confidence: 99%

Section: Brief Introduction To Hvaf Coatingsmentioning

confidence: 99%

Section: Brief Introduction To Hvaf Coatingsmentioning

confidence: 99%

Section: Brief Introduction To Erosionmentioning

confidence: 99%

See 2 more Smart Citations

High-velocity air fuel coatings for steel for erosion-resistant applications

Avcu

Güney

Avcu

2022

J. Electrochem. Sci. Eng.

View full text Add to dashboard Cite

show abstract

“…The performance of two coating processes to combat the water droplet impingement erosion (WDIE) phenomenon was compared [30]. High-velocity air fuel (HVAF) and high-velocity oxygen fuel (HVOF) processes are used to spray WC-10Co-4Cr powder on Ti-6Al-4V.…”

Section: Introductionmentioning

confidence: 99%

Corrosion and wear protection of AISI 4140 carbon steel using a laser-modified high-velocity oxygen fuel thermal sprayed coatings

Sivarajan

Joshi

Palani

et al. 2022

J. Electrochem. Sci. Eng.

View full text Add to dashboard Cite

Inconel and micro and nano WC-12Co powders were deposited on AISI 4140 carbon steel by high-velocity oxy fuel (HVOF) coating and followed by laser surface modification. Laser power and scan speed were varied at different levels. Microstructure and microhardness were investigated. Nanocoatings performed better than microcoatings. Nanostructured WC powder coatings exhibited greater hardness compared to microstructured powder coating. When the laser power is increased to 170 W, a small cellular dendrite microstructure through multiphase solidification is formed due to the difference in thermal properties of Inconel 625 and WC particles. Adequate laser power and low scan speed were preferred to produce a high-quality coating. From the electrochemical corrosion test results, it was observed that the corrosion rate of laser-modified HVOF sprayed coating is lower than the carbon steel sample. This shows that the Inconel sprayed by laser-modified HVOF coating enhanced the corrosion resistance of the substrate steel material. The porosity percentage was higher for all the samples when laser scan speed was increased.

show abstract