Grain Size and Adhesion Strength of the V₈C₇ Coatings Produced In Situ

Abstract:

The vanadium carbide (V₈C₇) coating was fabricated by in situ reaction which used gray cast iron and vanadium plate as raw materials providing carbon and vanadium sources, respectively. The microstructure, phases, and adhesion strength of V₈C₇ coating were investigated by scanning electron microscope (SEM), X-ray diffraction (XRD) and a single scratch test. The XRD results showed that the coating consisted of V₈C₇ and α-Fe, with the peaks of (222), (400), (440), (622) and (444) of V₈C₇ phase were confirmed. Moreover, the average diameter (D) of the V₈C₇ particles in the range of 432~582nm was calculated on the basis of the Scherrer and Halder-Wagner equations. The critical load of interface between V₈C₇ and substrate was 98.3 N, which implied that the interface of V₈C₇ coating /substrate had excellent adhesion strength.

• Periodical: Materials Science Forum (Volume 898)
• Pages: 1381-1387
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.898.1381
• Online since: June 2017
• Authors: Xin Wang, Li Sheng Zhong*, Xi Zhang, Yun Hua Xu, Hong Wu, Yong Hong Fu
• Keywords: Adhesion Strength, Grain Size, In Situ, V₈C₇ Coating

References

[1] T. Akao, Y. Sakurai, T. Onda, K. Uehara, Z.C. Chen. Surface Modification of Cold-working Die Steel by Electron Beam Irradiation-Formation of Cemented Carbide Composite Layer , Prec. Eng. 81 (2014) 1939-(1944).

DOI: 10.1016/j.proeng.2014.10.261

[2] L.S. Zhong, F.X. Ye, Y.H. Xu, J.S. Li. Microstructure and abrasive wear characteristics of in situ vanadium carbide particulate-reinforced iron matrix composites, Mater. Des. 54 (2014) 564-569.

DOI: 10.1016/j.matdes.2013.08.097

[3] A. Ghabchi, S. Sampath, K. Holmberg, et al. Damage mechanisms and cracking behavior of thermal sprayed WC–CoCr coating under scratch testing, Wear . 313 (2014) 97-105.

DOI: 10.1016/j.wear.2014.02.017

[4] J. Pujante, M. Vilaseca, D. Casellas, et al. High temperature scratch testing of hard PVD coatings deposited on surface treated tool steel, Surf. Coat. Technol. 254 (2014) 352-357.

DOI: 10.1016/j.surfcoat.2014.06.040

[5] K. Farokhzadeh, A. Edrisy, G. Pigott, et al. Scratch resistance analysis of plasma-nitrided Ti-6Al-4V alloy, Wear 302 (2013) 845-853.

DOI: 10.1016/j.wear.2013.01.070

[6] M. Gee, K. Mingard, J. Nunn, et al. In situ scratch testing and abrasion simulation of WC/Co, Int. J. Refract. Met. Hard Mater. 62 (2017) 192-201.

DOI: 10.1016/j.ijrmhm.2016.06.004

[7] X.L. Cai, Y.H. Xu, N.N. Zhao, et al. Investigation of the adhesion strength and deformation behaviour of in situ fabricated NbC coatings by scratch testing, Surf. Coat. Technol. 299 (2016) 135-142.

DOI: 10.1016/j.surfcoat.2016.05.004

[8] T.A. Adler, R.P. Walters, Wear and scratch hardness of 304 stainless steel investigated with a single scratch test, Wear. 162-164 (1993) 713-720.

DOI: 10.1016/0043-1648(93)90071-s

[9] A.T. Akono, F.J. Ulm, An improved technique for characterizing the fracture toughness via scratch test experiments, Wear . 313 (2014) 117-124.

DOI: 10.1016/j.wear.2014.02.015

[10] V. Vitry, F. Delaunois, C. Dumortier. Mechanical properties and scratch test resistance of nickel-boron coated aluminium alloy after heat treatments, Surf. Coat. Technol. 202 (2008) 3316-3324.

DOI: 10.1016/j.surfcoat.2007.12.001

[11] F.X. Ye, M. Hojamberdiev, Y. H Xu, L.S. Zhong, et. al. Microstructure, microhardness and wear resistance of VCp/Fe surface composites fabricated in situ, Appl. Surf. Sci. 280 (2013) 297-303.

DOI: 10.1016/j.apsusc.2013.04.152

[12] P. Scherrer, Bestimmung der Grosse und der inneren Struktur von Kolloidteilchen mittels Rontgenstrahlen, Nachr. Ges. Wiss. Got, Math. -Phys. Kl. 2 (1918) 98-100.

DOI: 10.1007/978-3-662-33915-2_7

[13] G.K. Williamson, W.H. Hall, X-ray line broadening from filed Al and W, Acta Metall. 1 (1953) 22-31.

[14] Z.W. Zhao, H.G. Zuo, Y. Liu ,W.Q. Song, S.F. Mao Y.R. Wang. Effects of additives on synthesis of vanadium carbide (V8C7) nanopowders by thermal processing of the precursor, Int J Refract Met Hard Mater. 27 (2009) 971-975.

DOI: 10.1016/j.ijrmhm.2009.06.002

[15] N.C. Halder, C.N.J. Wagner, Separation of particle size and lattice strain in integral breadth measurements, Acta Crystallogr. 20 (1966) 312-313.

DOI: 10.1107/s0365110x66000628

[16] J. Langford, J. Appl. Investigation of antiphase domains in lithium ferrite by analysis of the broadened X-ray lines, Acta Crystallogr. 34 (1978) 74-84.

DOI: 10.1107/s0567739478000145

[17] R. Daly, M. Khitouni, A.W. Kolsi, N. Njah, Phys. The studies of crystallite size and microstrains in aluminum powder prepared by mechanical milling, Physica A. 3 (2006) 3325-3331.

DOI: 10.1002/pssc.200567112

[18] D. Gouvêa, G.J. Pereira, L. Gengembre, M.C. Steil, P. Roussel, A. Rubbens, et al. Quantification of MgO surface excess on the SnO2 nanoparticles and relationship with nanostability and growth, Appl. Surf. Sci. 257 (2011) 4219-4226.

DOI: 10.1016/j.apsusc.2014.05.017