In this study, electroless nickel–phosphorus plating was optimised for WC–Co powder using different bath loads and then subjected to a high-velocity oxygen fuel process. The produced Ni–P-coated WC–12Co powders were subsequently used as HVOF feedstock materials. Based on the SEM results, an increase in the bath load resulted in a decrease in the thickness of the Ni–P coating formed on the WC–12Co powders. Moreover, applying the HVOF process led to a lower porosity and roughness and a higher thickness of nickel coating, whereas applying a suitable thickness of this coating can prevent the destructive W2C phase. Finally, a bath load of 16 g L–1 was determined as the optimum value to achieve a proper thickness of the Ni–P, extremely low porosity (0.3%), good surface roughness (5 μm), and high microhardness (1112 Hv) in the produced coating.
ArulvelS, ElayaperumalA, JagatheeshwaranMS.Electroless nickel – phosphorus coating on crab shell particles and its characterization. J Solid State Chem. 2017;248:87–95. doi: 10.1016/j.jssc.2017.02.001
2.
LuoH, LeitchM, BehnamianY, Development of electroless Ni–P/nano-WC composite coatings and investigation on its properties. Surf Coat Technol. 2015;277:99–106. doi: 10.1016/j.surfcoat.2015.07.011
3.
WoodRJ.Tribology of thermal sprayed WC–Co coatings. Int J Refract Met Hard Mater. 2010;28(1):82–94. doi: 10.1016/j.ijrmhm.2009.07.011
4.
LimNS, DasS, ParkSY, Fabrication and microstructural characterization of nano-structured WC/Co coatings. Surf Coat Technol. 2010;205(2):430–435. doi: 10.1016/j.surfcoat.2010.07.004
5.
SahaGC, KhanTI.The corrosion and wear performance of microcrystalline WC-10Co-4Cr and near-nanocrystalline WC-17Co high velocity oxy-fuel sprayed coatings on steel substrate. Metall Mater Trans A. 2010;41(11):3000–3009. doi: 10.1007/s11661-010-0296-1
6.
Suresh BabuP, BasuB, SundararajanG.Processing–structure–property correlation and decarburization phenomenon in detonation sprayed WC–12Co coatings. Acta Mater. 2008;56(18):5012–5026. doi: 10.1016/j.actamat.2008.06.023
7.
MateenA, SahaGC, KhanTI, Tribological behaviour of HVOF sprayed near-nanostructured and microstructured WC-17wt.%Co coatings. Surf Coat Technol. 2011;206(6):1077–1084. doi: 10.1016/j.surfcoat.2011.07.075
8.
KumariK, AnandK, BellacciM, Effect of microstructure on abrasive wear behavior of thermally sprayed WC-10Co-4Cr coatings. Wear. 2010;268:1309–1319. doi: 10.1016/j.wear.2010.02.001
9.
DorfmanMR, SporerD, MeyerP.Thermal spray technology growth in gas turbine applications. ASM Int. 2013;5A:280–285.
10.
HardwickeCU, LauYC.Advances in thermal spray coatings for gas turbines and energy generation: A review. J Therm Spray Technol. 2013;22(5):564–576. doi: 10.1007/s11666-013-9904-0
11.
Al-MutairiS, HashmiMSJ, YilbasBS, Microstructural characterization of HVOF/plasma thermal spray of micro/NanoWC-12%Co powders. Surf Coat Technol. 2015;264(25):175–186. doi: 10.1016/j.surfcoat.2014.12.050
12.
DuL, XuB, DongS, Sliding wear behavior of the supersonic plasma sprayed WC–Co coating in oil containing sand. Surf Coat Technol. 2008;202(15):3709–3714. doi: 10.1016/j.surfcoat.2008.01.009
13.
GuilemanyJ, De PacoJ, MiguelJ, Characterization of the W2C phase formed during the high velocity oxygen fuel spraying of a WC + 12 pct Co powder. Metall Mater Trans A. 1999;30(8):1913–1921. doi: 10.1007/s11661-999-0002-3
14.
VinayoME, KassabjiF, GuyonnetJ, Plasma sprayed WC–Co coatings: influence of spray conditions (atmospheric and low pressure plasma spraying) on the crystal structure, porosity, and hardness. J Vac Sci Technol A. 1985;3(6):2483–2489. doi: 10.1116/1.572863
15.
ChivavibulP, WatanabeM, KurodaS, Effects of carbide size and Co content on the microstructure and mechanical properties of HVOF-sprayed WC–Co coatings. Surf Coat Technol. 2007;202(3):509–521. doi: 10.1016/j.surfcoat.2007.06.026
16.
GuilemanyJ, DostaS, MiguelJ.The enhancement of the properties of WC-Co HVOF coatings through the use of nanostructured and microstructured feedstock powders. Surf Coat Technol. 2006;201(3):1180–1190. doi: 10.1016/j.surfcoat.2006.01.041
17.
BasakAK, CelisJP, VardavouliasM, Effect of nanostructuring and Al alloying on friction and wear behaviour of thermal sprayed WC–Co coatings. Surf Coat Technol. 2012;206(16):3508–3516. doi: 10.1016/j.surfcoat.2012.02.030
18.
BaikK, KimJ, SeongB.Improvements in hardness and wear resistance of thermally sprayed WC-Co nanocomposite coatings. Mater Sci Eng, A. 2007;449:846–849. doi: 10.1016/j.msea.2006.02.295
19.
ŻórawskiW.The microstructure and tribological properties of liquid-fuel HVOF sprayed nanostructured WC–12Co coatings, surface and coatings technology. Surf Coat Technol. 2013;220:276–281. doi: 10.1016/j.surfcoat.2012.11.007
20.
QiaoY, FischerTE, DentA.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 Technol. 2003;172(1):24–41. doi: 10.1016/S0257-8972(03)00242-1
21.
LiuS, ZhengX, GengG.Influence of nano-WC–12Co powder addition in WC–10Co–4Cr AC-HVAF sprayed coatings on wear and erosion behaviour. Wear. 2010;269(5):362–367. doi: 10.1016/j.wear.2010.04.019
22.
DentA, DePaloS, SampathS.Examination of the wear properties of HVOF sprayed nanostructured and conventional WC-Co cermets with different binder phase contents. J Therm Spray Technol. 2002;11(4):551–558. doi: 10.1361/105996302770348691
23.
TillmannW, VogliE, BaumannI, Influence of the HVOF gas composition on the thermal spraying of WC-Co submicron powders (− 8 + 1 μm) to produce superfine structured cermet coatings. J Therm Spray Technol. 2008;17(5–6):924–932. doi: 10.1007/s11666-008-9234-9
24.
MoustafaSF, Abdel-HamidZ, BaheigOG, Synthesis of WC hard materials using coated powders. Adv Powder Technol. 2011;22(5):596–601. doi: 10.1016/j.apt.2010.08.011
25.
LiuZ, JianL, TaoW.Preparation of WC–Co composite powder by electroless plating and its application in laser cladding. Mater Let. 2006;60(16):1956–1959. doi: 10.1016/j.matlet.2005.12.073
26.
WangL, GaoY, XueQ, Microstructure and tribological properties of electrodeposited Ni–Co alloy deposits. Appl Surf Sci. 2005;242(3):326–332. doi: 10.1016/j.apsusc.2004.08.033
