Previous literature on the use of WC nanoparticles in HVOF coatings has been limited and occasionally contradictory. This is primarily attributed to varying degrees of undesirable decarburization and decomposition of WC nanoparticles during the coating process. Uncontrolled, these changes significantly degrade coating properties. In this current research, the attributes of WC-10Co-4Cr HVOF coatings containing WC nanoparticles and microparticles with almost similar, controlled and minimized decarburization were compared. To minimize undesired decarburization, optimal HVOF parameters were employed. It was observed that the use of WC nanoparticles resulted in enhanced hardness and wear durability of these coatings. The enhanced properties of this nanocoating are attributed to a reduction in porosity size and count, improved arrangement and distribution of WC nanoparticles, and a decrease in the interparticle spacing.
NahaDChatterjeeS, et al.HVOF Sprayed WC-CoCr coating on mild steel: microstructure and wear evaluation. Appl Phys2016; 8: 47–56.
2.
Durga PrasadCSoniPK. Studies on wear and microstructure assessment of WC-Co reinforced iron based HVOF coating. Results Surf Interfaces2024; 15: 100237.
3.
OwoseniTAGuptaM, et al.Wear and corrosion of HVAF and HVOF-sprayed WC-CoCr coatings on aluminum alloy. Therm Spray Tech2025; 34: 970–991.
4.
SinghPJoshiA, et al.Characterization of various substrates coated with different coating powders by thermal spray processes: a brief review. Basic Appl Eng Research2015; 2: 257–260.
5.
RawatDBarthwalPJoshiA. Carbide coatings on hot working steel (Cr high alloy H-13 steel) by detonation gun process: a review. Mech Product Engin2013; 1: 2320–2092.
6.
YuJLiuXYuY, et al.Research and application of high-velocity oxygen-fuel coatings. Coatings2022; 12: 828–831.
7.
LiMChristofidesPD. Modeling and control of high-velocity oxygen-fuel (HVOF) thermal spray: a tutorial review. Therm Spray Technol2009; 18: 753–768.
8.
BergerJESchulzR, et al.Wear and corrosion properties of HVOF coatings from super duplex alloy modified with addition of boron. Surf Coat Technol2017; 309: 911–919.
9.
OksaMTurunenE, et al.Optimization and characterization of high-velocity-oxy-fuel sprayed coatings: techniques. materials, and applications. Coatings2011; 1: 17–52.
10.
MeghwalAAnupamA, et al.Thermal spray high-entropy alloy coatings: a review. Therm Spray Technol2020; 29: 857–893.
11.
SapateSTangselwarNPaulS, et al.Effect of coating thickness on the slurry erosion resistance of HVOF-sprayed WC-10Co-4Cr coatings. Therm Spray Technol2021; 30: 1365–1379.
12.
ChoTYoonJKimK, et al.A study on HVOF coatings of micron and nano WC–co powders. Surf Coat Technol2008; 202: 5556–5559.
13.
ThakurLAroraN. Sliding and abrasive wear behavior of WC-CoCr coatings with different carbide sizes. Mater Eng Perform2013; 22: 574–583.
14.
ShipwayPMcCartneyDSudaprasertT. Sliding wear behaviour of conventional and nanostructured HVOF sprayed WC–Co coatings. Wear2005; 259: 820–827.
15.
QiaoLWuYHongS, et al.Wet abrasive wear behavior of WC-based cermet coatings prepared by HVOF spraying. Ceram Int2021; 47: 1829–1836.
16.
BolelliGBergerLM, et al.Tribology of HVOF- and HVAF-sprayed WC–10Co4Cr hard metal coatings: a comparative assessment. Surf Coat Technol2015; 265: 125–144.
17.
LekatouASioulasDGrimanelisD. Corrosion and wear of coatings fabricated by HVOF-spraying of nanostructured and conventional WC–10Co-4Cr powders on Al7075-T6. Int Refract Metals Hard Mater2023; 112: 106164.
18.
SiCLiSZhaoL, et al.Effect of HVOF–sprayed nanostructured WC–10Co–4Cr coating on sliding wear and tensile–tensile fatigue properties of TC6 titanium alloy. Int Refract Metals Hard Mater2024; 118: 106463.
19.
ThakurLAroraN. A study on erosive wear behavior of HVOF sprayed nanostructured WC-CoCr coatings. Mech SciTechnol2013; 27: 1461–1467.
20.
QiaoYFischerTEDentA. The effects of fuel chemistry and feedstock powder structure on the mechanical and tribological properties of HVOF thermal-sprayed WC–Co coatings with very fine structures. Surf Coat Technol2003; 172: 24–41.
21.
BasiriMHMosallaeeM. Optimizing the properties of nano WC-10Co-4Cr HVOF coatings by using RSM. Surf Eng2024; 40: 1–12.
22.
BolledduVRacherla1V, et al.Comparative study of air plasma sprayed and high velocity oxy-fuel sprayed nanostructured WC-17wt%Co coatings. Adv Manf Technol2016; 84: 1601–1613.
SrikanthAVenkateshwarluB. High velocity oxy fuel (HVOF) sprayed coating nanoarchitectonics: infuence of reduced graphene oxide (rGO) on tribological characteristics. Appl Phys A2023; 129: 318.
26.
StewartDShipwayPMcCartneyD. Abrasive wear behaviour of conventional and nanocomposite HVOF-sprayed WC–Co coatings. Wear1999; 225: 789–798.
27.
GuzanováABrezinováJDraganovskáD, et al.Properties of coatings created by HVOF technology using micro-and nano-sized powder. KOM–Corros and Mater Protec2019; 63: 86–93.
28.
MarpleBRLimaRS. Process temperature/velocity-hardness-wear relationships for high-velocity oxyfuel sprayed nanostructured and conventional cermet coatings. Therm Spray Technol2005; 14: 67–76.
29.
HongSWuYWangB, et al.High-velocity oxygen-fuel spray parameter optimization of nanostructured WC–10Co–4Cr coatings and sliding wear behavior of the optimized coating. Mater Des2014; 55: 286–291.
30.
BaumannIHagenLTillmannW, et al.Process characteristics, particle behavior and coating properties during HVOF spraying of conventional, fine and nanostructured WC-12Co powders. Surf Coat Technol2021; 405: 126716.
31.
NguyenT-PDinhV-CLeV-T, et al.Researching the effect of high-velocity oxygen fuel spraying parameters on porosity of WC-12Co coating on inner cylinder. In: Int Conference on Mater, Machines and Methods for Sustainable Development, 2022, pp.485–492.
32.
RajendranPRDuraisamyTChidambaram SeshadriR, et al.Optimisation of HVOF spray process parameters to achieve minimum porosity and maximum hardness in WC-10Ni-5Cr coatings. Coating2022; 12: 339.
33.
SinghGKumarSSehgalSS. Taguchi approach to erosion wear optimization of WC-10Co-4Cr sprayed austenitic steel subjected to equisized slurry. Ind Lubr and Tribol2018; 70: 1774–1782.
34.
ThermsukSSurinP. Optimization parameters of WC-12Co HVOF sprayed coatings on SUS 400 stainless steel. Procedia Manuf2019; 30: 506–513.
35.
PierlotCPawlowskiLBiganM, et al.Design of experiments in thermal spray: a review. Surf Coat Technol2008; 202: 4483–4490.
36.
ShankarRBalasubramanianKSivapirakasamS, et al.ANN And RSM models approach for optimization of HVOF coating. Mater Today Proc2021; 46: 9201–9206.
37.
PrasadRVRajeshRThirumalaikumarasamyD, et al.Sensitivity analysis and optimisation of HVOF process inputs to reduce porosity and maximise hardness of WC-10Co-4Cr coatings. Sādhanā2021; 46: 1–23.
38.
ThiruvikramanCBalasubramanianVSridharK. Optimizing HVOF spray parameters to maximize bonding strength of WC-CrC-Ni coatings on AISI 304L stainless steel. Therm Spray Technol2014; 23: 860–875.
39.
MuruganKRagupathyABalasubramanianV, et al.Optimizing HVOF spray process parameters to attain minimum porosity and maximum hardness in WC–10Co–4Cr coatings. Surf Coat Technol2014; 247: 90–102.
40.
Tejero-MartinDRezvani RadMMcDonaldA, et al.Beyond traditional coatings: a review on thermal-sprayed functional and smart coatings. Therm Spray Technol2019; 28: 598–644.
41.
LeeCWHanJH, et al.A study on powder mixing for high fracture toughness and wear resistance of WC–co–cr coatings sprayed by HVOF. Surf Coat Technol2010; 204: 2223–2229.
42.
HeJSchoenungJM. A review on nanostructured WC–Co coatings. Surf Coat Technol2002; 57: 72–79.
43.
KumariKAnandKBellacciM, et al.Effect of microstructure on abrasive wear behavior of thermally sprayed WC–10Co–4Cr coatings. Wear2010; 268: 1309–1319.
44.
ChoTYYoonJHKimKS, et al.Friction behavior of HVOF thermal spray coating of micron size WC-co powder. Adv Mater Res2007; 26: 1325–1328.
45.
RakhadilovBMuktanovaN, et al.Influence of varying the spraying distance on the structural-phase state and mechanotribological properties of 86WC-10Co-4Cr-based coatings obtained by the HVOF method. Coatings2024; 14: 264.
46.
SahraouiTGuessasmaSJeridaneMA, et al.HVOF Sprayed WC–co coatings: microstructure, mechanical properties and friction moment prediction. Mater Des2010; 31: 1431–1437.
47.
RazaAAhmadF. An influence of oxygen flow rate and spray distance on the porosity of HVOF coating and its effects on corrosion—A review. Coatings2022; 15: 6329.
48.
SchwetzkeRKreyeH. Microstructure and properties of tungsten carbide coatings sprayed with various high-velocity oxygen fuel spray systems. Therm Spray Technol1999; 8: 433–439.
