MSA  Vol.9 No.11 , October 2018
Investigation of the Boriding Process of the Ti-Al Intermetallic Alloy GE48-2-2 Taking into Account the Probability of the Influence of the Substrate Modification
Abstract: Boriding of the Ti-Al intermetallic GE48-2-2 at 1273 K for 10 hours was performed. In order to ensure that no any serious alteration occurred in the substrate, it was previously examined with X-Ray Diffractometry (XRD), after it has undergone an annealing process at the temperature of boronizing. Subsequently, we examined the coating with XRD and Scanning Electron Microscopy, in order to characterize its structure and morphology. A dense TiΒ2 layer, 10 - 15 μm thick, was formed, but also Cr2B3 and NbN, BN and some Ti-Al phases were detected. Efforts were undertaken to focus on influence of the substrate modification, towards the quality of the coating.
Cite this paper: Zagkliveris, D. and Triantafyllidis, G. (2018) Investigation of the Boriding Process of the Ti-Al Intermetallic Alloy GE48-2-2 Taking into Account the Probability of the Influence of the Substrate Modification. Materials Sciences and Applications, 9, 873-882. doi: 10.4236/msa.2018.911063.

[1]   Appel, F. and Oehring, M. (2003) γ-Titanium Aluminide Alloys: Alloy Design and Properties. In: Leyens, C. and Peters, M., Eds., Titanium and Titanium Alloys, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 89-152.

[2]   Popela, T., Hamacek, J., Kützendorfer, J. and Vojtech, D. (2011) The Influence of Tantalum on the High Temperature Characteristics of Lamellar Gamma + Alpha 2 Titanium Aluminide. Materials Science and Engineering, 528, 8557-8564.

[3]   Popela, T., Kubásek, J., Maixner, J., Novák, P. and Vojtěch, D. (2011) Comparison of Nb- and Ta-Effectiveness for Improvement of the Cyclic Oxidation Resistance of TiAl-Based Intermetallics. Intermetallics, 19, 493-501.

[4]   Miura, K. and Yoshihara, M. (1995) Effects of Nb Addition on Oxidation. Intermetallics, 3, 357-363.

[5]   Swadzba, L., Moskal, G., Jarczyk, G., Aguilar, J. and Goral, M. (2011) Diffusion Aluminide Coatings for TiAl Intermetallic Turbine Blades. Intermetallics, 19, 744-747.

[6]   Thongtem, T., McNallan, M., Thongtem, S. and Sopunna, K. (2004) Surface Modification of the γ-TiAl Alloys by the Nitridation. Surface Science, 566-568, 810-815.

[7]   Ma, X.X., Zhao, X.G., Zhang, F., Shi, J.Y., Zhang, J. and Liang, W. (2007) Oxidation Kinetics of the Pack Siliconized TiAl-Based Alloy and Microstructure Evolution of the Coating. Intermetallics, 15, 1-8.

[8]   Anthymidis, K.G., Stergioudis, G. and Tsipas, D.N. (2002) Boride Coatings on Non-Ferrous Materials in a Fluidized Bed. Science and Technology of Advanced Materials, 3, 303-311.

[9]   Anthymidis, K.G., Tsipas, D.N. and Stergioudis, G. (2001) Boriding of Titanium Alloys in a Fluidized Bed Reactor. Journal of Materials Science Letters, 20, 2067-2069.

[10]   Vázquez-Alcázar, M.R., Ruiz Navas, E.M., Gordo, E. and Tsipas, S.A. (2010) Boride Coatings Obtained by Pack Cementation Deposited on Powder Metallurgy and Wrought Ti and Ti-6Al-4V. Surface & Coatings Technology, 205, 2340-2347.

[11]   Vojtech, D. and Popela, T. (2012) Characterization of Pack-Borided Last-Generation TiAl Intermetallics. Surface & Coatings Technology, 209, 90-96.

[12]   GfE (2010) Data Sheet for γ-TiAl 48-2-2 Ingots.

[13]   Lei, M.K., Zhu, X.P., Han, S.Q., Wang, D.Y., Wang, F.G. and Wang, F. (2000) Effect of Borate Coating on Oxidation Resistance of γ-TiAl Intermetallic Compound. Materials Chemistry and Physics, 65, 249-252.

[14]   Aich, S. and Ravi Chandran, K.S. (2002) TiB Whisker Coating on Titanium Surfaces by Solid-State Diffusion: Synthesis, Microstructure, and Mechanical Properties. Metallurgical and Materials Transactions A, 33, 3489-3498.

[15]   Atar, E., Kayali, E.S. and Cimenoglu, H. (2008) Characteristics and Wear Performance of Borided Ti6Al4V Alloy. Surface & Coatings Technology, 202, 4583-4590.

[16]   Li, F., Yi, X., Zhang, J., Fan, Z., Gong, D. and Xi, Z. (2010) Growth Kinetics of Titanium Boride Layers on the Surface of Ti6Al4V. Acta Metallurgica Sinica (English Letters), 23, 293-300.

[17]   Madtha, S., Lee, C. and Ravi Chandran, K.S. (2008) Physical and Mechanical Properties of Nanostructured Titanium Boride (TiB) Ceramic. Journal of the American Ceramic Society, 91, 1319-1321.

[18]   Okada, S., Atoda, T. and Higashi, I. (1987) Structural Investigation of Cr2B3, Cr3B4, and CrB by Single-Crystal Diffractometry. Journal of Solid State Chemistry, 68, 61-67.

[19]   Borcz, C., Lepienski, C.M. and Brunatto, S.F. (2013) Surface Modification of Pure Niobium by Plasma Nitriding. Surface & Coatings Technology, 224, 114-119.

[20]   Azaroff, L.V. (1968) Elements of X-Ray Crystallography. McGraw-Hill Inc., New York.

[21]   Koch, B., MacGillavry, C.H., Milledge, H.J., Koopmans, K., Rieck, G.D. and Bacon, G.E. (1968) Measurements and Interpretation of Intensities: Absorption. In: MacGillavry, C.H. and Rieck, G.D., Eds., International Tables for X-Ray Crystallography, The Kynoch Press, Birmingham, Vol. III, Ch. 3.2, 157-169.