Abstract
Near-nanostructured WC-18 pct Co coatings, with low amounts of non-WC carbide phases, have been synthesized using high velocity oxygen fuel (HVOF) thermal spraying under spraying conditions of varying fuel chemistry, fuel-oxygen ratio, and powder particle size. The results show that the temperature the particles experience during spraying depends on the preceding parameters. Compared to available published results on WC-Co system coatings, nanostructured WC-18 pct Co coatings, synthesized in these experiments, contain very low amounts of non-WC carbide phase (less than 10 pct vol). This is comparable to that of the conventional WC-12 pct Co coating, prepared in the present study for comparison purposes. Regardless of whether the binder phase in the agglomerated feedstock powder particles melt or not, the WC particles do not appear to experience significant growth as a result of the spraying. The size of WC particles remains in the 200 to 500 nm range, consistent with that present in the feedstock powder. The as-received near-nanostructured WC-18 pct Co feedstock powder exhibits morphological characteristics that lead to low amounts of non-WC carbide phases in the coatings. The microstructure and phase constitution of the coatings depend on particle size of the feedstock powder and flame characteristics of the fuels during spraying. A higher particle temperature causes more decomposition of the WC phase but reduces porosity in the coatings, this occurs with higher flame temperature and smaller particle sizes. Propylene fuel produces less decomposition of the WC phase despite the higher flame temperature and, thus, provides the best combination of dense coating with low amount of non-WC phase.
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S. Rangaswamy and H. Herman: Advances in Thermal Spraying, Pergamon Press, Elmsford, NY, 1986, pp. 101–10.
D. Tu, S. Chang, C. Chao, and C. Lin: J. Vac. Sci. Technol., 1985, vol. A3, pp. 2479–82.
L. Moskowitz and K. Trelewicz: J. Thermal Spray Technol., 1997, vol. 6, pp. 294–99.
D.J. Nolan and M. Samandi: J. Thermal Spray Technol., 1997, vol. 6, pp. 422–24.
H.L. de Villiers Lovelock, P.W. Richer, J.M. Benson, and P.M. Young: J. Thermal Spray Technol., 1998, vol. 7, pp. 97–107.
C.J. Li, A. Ohmori, and Y. Harada: J. Mater. Sci., 1996, vol. 31, pp. 785–94.
J. Subrahmanyam, M.P. Srivastava, and R. Sivakumar: Mater. Sci. Eng., 1986, vol. 84, pp. 209–14.
J.E. Nerz, B.A. Kushner, and A.J. Rotolico: J. Thermal Spray Technol., 1992, vol. 1, pp. 147–52.
A. Karimi, C. Verdon, and G. Barbezat: Surf. Coating Technol., 1993, vol. 57, pp. 81–89.
C.J. Li, A. Ohmori, and Y. Harada: J. Thermal Spray Technol., 1996, vol. 5, pp. 69–73.
W.J. Jarosinski, M.F. Gruninger, and C.H. Londry: in Thermal Spray Coatings: Research, Design and Applications, C.C. Berndt and T.F. Bernecki, eds., ASM INTERNATIONAL, Materials Park, OH, 1993, pp. 153–57.
K. Niemi, P. Vuoristo, T. Mantyla, G. Barbezat, and A.R. Nicoll: in Thermal Spray: International Advances in Coatings Technology, C.C. Berndt, ed., ASM INTERNATIONAL, Materials Park, OH, 1992, pp. 655–89.
H.L. de Villiers Lovelock: Thermal Spray Technol., 1998, vol. 7, pp. 357–73.
V. Ramnath and N. Jayaraman: Mater. Sci. Technol., 1989, vol. 5, pp. 382–88.
H.J. Kim, Y.G. Kweon, and R.W. Chang: J. Thermal Spray Technol., 1994, vol. 3, pp. 169–78.
D.J. Varacalle, Jr., E. Acosta, J. Figert, M. Syma, J. Worthington, and D. Carrillo: in Thermal Spray: Practical Solutions for Engineering Problems, C.C. Berndt, ed., ASM INTERNATIONAL, Materials Park, OH, 1996, pp. 699–707.
J.E. Nerz, B.A. Kushner, and A.J. Rotolico: in Protective Coatings: Processing and Characterization, R.M. Yazici, ed., TMS, Warrendale, PA, 1990, pp. 133–43.
S.Y. Hwang, B.G. Seong, and M.C. Kim: in Thermal Spray: Practical Solutions for Engineering Problems, C.C. Bemdt, ed., ASM INTERNATIONAL, Materials Park, OH, 1996, pp. 107–12.
S.F. Wayne and S. Sampath: J. Thermal Spray Technol., 1992, vol. 1, pp. 307–15.
J. Nutting, J.M. Guilemay, and Z. Dong: Mater. Sci. Technol., 1995, vol. 11, pp. 961–66.
J. He, M. Ice, S. Dallek, and E.J. Lavernia: Metall. Mater. Trans. A, 2000, vol. 31A, pp. 541–53.
T.A. Mantyla, K.J. Niemi, P.M.J. Vuoristo, G. Barbezat, and A.R. Nicoll: Proc. 2nd Plasma-Technik Symp., S. Blum-Sandmeier, H. Eschnauer, P. Huber, and A. Nicoll, eds., Sulzer Metco AG, Wohlen, Switzerland, 1991, vol. 1, pp. 287–97.
G. Barbezat, A.R. Nicoll, and A. Sickinger: Wear, 1993, vols. 162–164, pp. 529–37.
T.P. Slavin and J. Nerz: in Thermal Spray Research and Applications, T.F. Bernecki, ed., ASM INTERNATIONAL, Materials Park, OH, 1991, pp. 159–65.
S. Usmani, S. Sampath, and H. Herman: in Thermal Spray Processing of Nanoscale Materials—A Conference Report with Extended Abstracts, C.C. Berndt and E.J. Lavernia, eds., J. Thermal Spray Technol., 1998, vol. 7, pp. 429–31.
D.A. Stewart, P.H. Shipway, and D.G. McCartney: Wear, 1999, vols. 225–229, pp. 789–98.
P. Vuoristo, K. Niemi, A. Makela, and T. Mantyla: in Thermal Spray: Research, Design and Applications, C.C. Berndt and T.F. Bemecki, eds., ASM INTERNATIONAL, Materials Park, OH, 1993, pp. 173–78.
S.F. Wayne and S. Sampath: J. Thermal Spray Technol., 1992, vol. 1, pp. 307–15.
P.R. Strutt: in Thermal Spray Processing of Nanoscale Materials—A Conference Report with Extended Abstracts, C.C. Berndt and E.J. Lavernia, eds., J. Thermal Spray Technol., 1998, vol. 7, pp. 413–15.
B.K. Kear and L.E. McCandlish: Nanostr. Mater., 1993, vol. 3, pp. 19–30.
Y. Qiao, Y. Liu, and T.E. Fischer: Department of Materials Science and Engineering, Stevens Institute of Technology, Hoboken, NJ, unpublished research.
T. Ueda, M. Sato, and T. Sugita: J. Jpn. Soc. Precision Eng., 1995, vol. 61, pp. 1448–52.
U.A. Tamburini, G. Campari, G. Spinolo, and P. Lupotto: Rev. Sci. Instrum., 1995, vol. 66, pp. 5006–14.
Spraytime, 2000, first quarter, pp. 6–7.
D.J. Varacalle, G.R. Smolik, G.C. Wilson, G. Trons, and A. Walter: in Protective Coatings: Processing and Characterization, R.M. Yazici, ed., TMS, Warrendale, PA, 1990, pp. 121–34.
L.M. Berger: in Thermal Spray: International Advances in Coatings Technology, C.C. Berndt, ed., ASM INTERNATIONAL, Materials Park, OH, 1992, pp. 253–58.
G.V. Bobrov, V.B. Shekhov, G.M. Bluykher, and T.E. Fomina: Proc. Conf. Pluch. Pokrytii Vysokotemp. Raspylenium, L.K. Druzhinin, ed., Atomizdat, Moscow, 1973, pp. 245–55.
S. Rangasywamy and H. Herman: Advances in Thermal Spraying, Pergamon Press, Elmsford, NY, 1986, pp. 101–10.
H. Kreye, D. Fandrich, H.H. Muller, and G. Reiners: Advances in Thermal Spraying, Pergamon Press, Elmsford, NY, 1986, pp. 121–28.
C. Li, A. Ohmori, and Y. Harada: in Thermal Spraying Current Status and Future Trends, A. Ohmori, ed., High Temperature Society of Japan, Osaka, Japan, 1995, pp. 333–39.
H. Maruo, Y. Hirata, and Y. Matsumoto: in Thermal Spraying Current Status and Future Trends, A. Ohmori, ed. High Temperature Society of Japan, Osaka, Japan, 1995, pp. 341–46.
M. Fukumoto, S. Katoh, and I. Okane: in Thermal Spraying Current Status and Future Trends, A. Ohmori, ed., High Temperature Society of Japan, Osaka, Japan, 1995, pp. 353–58.
O.P. Solonenko, A. Ohmori, S. Matsuno, and A.V. Smirnov: in Thermal Spraying Current Status and Future Trends, A. Ohmori, ed., High Temperature Society of Japan, Osaka, Japan, 1995, pp. 359–64.
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He, J., Lavernia, E.J., Liu, Y. et al. Near-nanostructured WC-18 pct Co coatings with low amounts of non-WC carbide phase: Part I. Synthesis and characterization. Metall Mater Trans A 33, 145–157 (2002). https://doi.org/10.1007/s11661-002-0013-9
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DOI: https://doi.org/10.1007/s11661-002-0013-9