Effect of WC Particle Size on the Abrasive Wear of Thermally Sprayed WC-Co Coatings

Li, Chang-Jiu; Ohmori, Akira; Tani, Kazumi

doi:10.1080/10426919908914815

Cited by 31 publications

(7 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In HVOF process, however, the coating microstructure, which dominates the wear performance of the coatings, is significantly influenced by starting materials (Ref [12][13][14], spray systems ( Ref 15,16), and spray parameters including flows of oxygen and fuel gases and spray distances (Ref [17][18][19]. Therefore, many studies have been conducted to optimize the compositions of starting materials and the spray conditions of HVOF Cr 3 C 2 -NiCr coatings for antiwear and anti-erosion applications (Ref [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…It is usually considered that the wear and erosion resistance of cermet coatings are predominatingly influenced by its microstructures including the splat size, carbide particle size, carbide content and carbide distribution within a splat, and the cohesion between the splats (Ref [11][12][13][14]. On the other hand, the microstructure of high-velocity oxygen fuel (HVOF)-sprayed cermet coatings is significantly influenced by the microstructure of starting powder, spray system, and spray conditions (Ref [15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Erosion Performance of HVOF-Sprayed Cr3C2-NiCr Coatings

Wang

et al. 2007

J Therm Spray Tech

Self Cite

View full text Add to dashboard Cite

Cr 3 C 2 -NiCr coatings were deposited by high-velocity oxygen fuel (HVOF) spraying process under spray conditions of different flows of oxygen and propane gases, and spray distances. The orthogonal regression experimental design method was used for systematic investigation of the influence of spray parameters on the erosion performance of Cr 3 C 2 -NiCr coatings. Erosion tests were performed at different jet angles of abrasive particles. The erosion mechanism of Cr 3 C 2 -NiCr coatings was examined through the surface morphology and cross-sectional microstructure of the eroded coatings. The correlations of the carbide particle size and carbide content with the erosion rate were examined. It was found that the erosion occurred dominantly by spalling of splats from the lamellar interfaces. The spalling resulted from the propagation of cracks parallel to the interfaces between the lamellae exposed to the surface and underlying coating. The carbide particle size and content in the coating influenced significantly the erosion performance of Cr 3 C 2 -NiCr coatings.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Erosion Performance of HVOF-Sprayed Cr3C2-NiCr Coatings

Wang

et al. 2007

J Therm Spray Tech

Self Cite

View full text Add to dashboard Cite

show abstract

“…5,9,[12][13][14] Moreover, it could be considered that the decomposition of the carbide is limited during spraying.…”

Section: Discussionmentioning

confidence: 99%

“…A detailed description of the system was given elsewhere. 12) Propane was used as fuel gas and nitrogen was used as powder carrier gas. The pressures of propane and oxygen were fixed at 0.35 and 0.55 MPa, respectively.…”

Section: Deposition Of Hvof Coatingsmentioning

confidence: 99%

Deposition Behaviors of Solid Phases in Liquid-Solid Two-Phase Particles in High Velocity Oxy-Fuel Spraying

Wang

Kusumoto

2006

Mater. Trans.

View full text Add to dashboard Cite

Three types of composite coatings were deposited by high velocity oxy-fuel (HVOF) spraying using metal-clad WC-18Co and SiC-50Co cermet powders, and sintered-crushed Al 2 O 3 -75Ni composite powders. Liquid-solid two-phase state of the sprayed particles with two different structures was achieved prior to their impingement on the substrate. The effects of particle structure and HVOF spraying parameters on volume fraction of the solid phase were investigated. The distribution of ceramic particle size inside coatings was also clarified. Scanning electron microscopy was employed to characterize the microstructure of HVOF sprayed cermet coatings. The volume fraction of solid particles and the distribution of particle size in the three types of coatings were estimated using a quantitatively metallographic approach from the microstructure of the coatings. The volume fraction of the solid phase in the coating made from Al 2 O 3 -Ni powders was increased with increase in the fuel gas flow. The maximum volume fraction of the Al 2 O 3 phases reached about 64% of the original powder. On the other hand, the volume fraction of solid phase in the clad cermet coatings was decreased with increasing the fuel gas flow. The volume fraction of the solid phase dropped significantly from 72.2% in the original WC-18Co particle to 8.5% in the coating. The limited retention of the solid phase from spray particle to subsequent coating is due to rebounding off of large solid particle upon impacting.

show abstract

“…The studies of Ghabchi [10] and Ma [11], et al showed that optimizing WC size and structure can improve the mechanical properties and wear resistance of HVOF sprayed WC based coatings. Scieska [12] and Li [13], et al suggested that WC based cermet coatings with a high volume fraction of fine WC particles would exhibit high wear performance. Therefore, nanostructure WC based coatings have been extensively studied for the improvement of the microhardness and wear performance [14,15].…”

Section: Introductionmentioning

confidence: 99%

Structure of Micro-nano WC-10Co4Cr Coating and Cavitation Erosion Resistance in NaCl Solution

Ding

Cheng

Yuan

et al. 2017

Chin. J. Mech. Eng.

View full text Add to dashboard Cite

Cavitation erosion (CE) is the predominant cause for the failure of overflow components in fluid machinery. Advanced coatings have provided an effective solution to cavitation erosion due to the rapid development of surface engineering techniques. However, the influence of coating structures on CE resistance has not been systematically studied. To better understand their relationship, micro-nano and conventional WC-10Co4Cr cermet coatings are deposited by high velocity oxygen fuel spraying(HVOF), and their microstructures are analyzed by OM, SEM and XRD. Meanwhile, characterizations of mechanical and electrochemical properties of the coatings are carried out, as well as the coatings' resistance to CE in 3.5 wt % NaCl solution, and the cavitation mechanisms are explored. Results show that micro-nano WC-10Co4Cr coating possesses dense microstructure, excellent mechanical and electrochemical properties, with very low porosity of 0.26 ± 0.07% and extraordinary fracture toughness of 5.58 ± 0.51 MPaÁm 1/2 . Moreover, the CE resistance of micro-nano coating is enhanced above 50% than conventional coating at the steady CE period in 3.5 wt % NaCl solution. The superior CE resistance of micronano WC-10Co4Cr coating may originate from the unique micro-nano structure and properties, which can effectively obstruct the formation and propagation of CE crack. Thus, a new method is proposed to enhance the CE resistance of WC-10Co4Cr coating by manipulating the microstructure.

show abstract

Effect of WC Particle Size on the Abrasive Wear of Thermally Sprayed WC-Co Coatings

Cited by 31 publications

References 5 publications

Erosion Performance of HVOF-Sprayed Cr3C2-NiCr Coatings

Erosion Performance of HVOF-Sprayed Cr3C2-NiCr Coatings

Deposition Behaviors of Solid Phases in Liquid-Solid Two-Phase Particles in High Velocity Oxy-Fuel Spraying

Structure of Micro-nano WC-10Co4Cr Coating and Cavitation Erosion Resistance in NaCl Solution

Contact Info

Product

Resources

About