Morphology of Barrier Coatings and Formation of an Interphase Boundary by Brazing of Dissimilar Alloys

S. V. Maksymova, P. V. Kovalchuk, V. V. Voronov

Институт электросварки им. Е. О. Патона НАН Украины, ул. Казимира Малевича, 11, 03150 Киев, Украина

Получена: 27.04.2023; окончательный вариант - 28.05.2023. Скачать: PDF

As established by the conducted studies of brazing dissimilar joints of Kovar with titanium alloy, applying a standard procedure of barrier nickel coating deposition on a titanium alloy by electrolytic method does not ensure its integrity during vacuum heating in the brazing mode. The structure, chemical heterogeneity of brazed joints and surface morphology of the nickel coating are studied by applying the chemical method of producing a barrier nickel coating. Proceeding from the derived investigation results, a 4-stage technology of electrolytic application for the barrier nickel coating is proposed. This coating preserves its integrity during vacuum brazing of the following dissimilar metals: BT1-0 titanium alloy with 29NK precision alloy. A detailed study of the Kovar + BT1-0 brazed joints with the application of electron microscopy and x-ray microspectral analysis confirm the formation of dense brazed seams with full penetration fillet regions with a eutectic rod-like structure, when using silver brazing filler metal.

Ключевые слова: structure, barrier coating, vacuum brazing, Kovar, titanium alloy.

URL: https://mfint.imp.kiev.ua/ru/abstract/v45/i08/0963.html

PACS: 06.60.Vz, 68.35.Fx, 68.37.Hk, 68.55.J-, 81.15.Pq, 81.20.Vj, 82.45.Qr

ЦИТИРОВАННАЯ ЛИТЕРАТУРА

N. K. Adomako, J. O. Kim, S. Hwan, L. Kyung-ho Noh, and J. H. Kim, Mater. Sci. Eng. A, 732, Nо. 8: 378 (2018). Crossref
T. Song, X. Jiang, Z. Shao, D. Mo, D. Zhu, M. Zhu, C. H. Young, and Z. Luo, J. Iron, Steel Res. Int., 24, No. 10: 1023 (2017). Crossref
D. Mo, T. Song, Y. Fang, X. Jiang, C. Q. Luo, M. D. Simpson, and Z. Luo, Adv. Mater. Sci. Eng., 2018: 1 (2022). Crossref
G. V. Ermolaev, V. V. Kvasnitsky, V. F. Kvasnitsky, S. V. Maksymova, V. F. Khorunov, and V. V. Chigarov, Payannya Metaliv [Brazing Materials] (Mykolaiv: NUK: 2015) (in Ukrainian).
Y. Fang, X. Jiang, D. Mo, T. Song, Z. Shao, D. Zhu, M. Zhu, and Z. Luo, Adv. Mater. Sci. Eng., 2018: 1 (2018). Crossref
J. Song, A. Kostka, M. Veehmayer, and D. Raabe, Mater. Sci. Eng. A, 528, No. 6: 2641 (2011). Crossref
N. N. Kumar, G. D. J. Ram, S. S. Bhattacharya, H. C. Dey, and S. K. Albert, Trans. Indian Inst. Met., 68, No. 2: 289. (2015). Crossref
G. J. Qiao, H. J. Wang, J. Q. Gao, and Z. H. Jin, Mater. Sci. Forum, 486–487: 481 (2005). Crossref
V. Sh. Avagyan, Bulletin of the Donbas State Machine-Building Academy, 2, No. 19: 21 (2010) (in Ukrainian).
S. H. Baghjari, M. Gholambargani, and S. A. A. Akbari Mousavi, Lasers Manuf. Mater. Process., 6: 14 (2019). Crossref
V. V. Andreeva and V. I. Kazarin, Novyye Konstruktsionnyye Khimicheski Stoykie Materialy [New Structural Chemical-Resistant Materials] (Moskva: Goskhimizdat: 1961) (in Russian).
M. A. Dasoyan, I. Ya. Palmskaya, and E. V. Sakharova, Tekhnologiya Ehlektrokhimicheskikh Pokrytiy [Technology of Electrochemical Coatings] (Leningrad: Mashinostroyenie: 1989) (in Russian).
F. F. Azhogin, M. A. Belenky, and I. E. Gall, Gal’vanotekhnika: Spravochnik [Electroplating: Reference Book] (Eds. A. M. Ginberg, A. F. Ivanov, and L. L. Kravchenko) (Moskva: Metallurgiya: 1987) (in Russian).
G. Ya. Yakimenko and V. M. Artemenko, Tekhnichna Ehlektrokhimiya. Ch. III. Metody Galvanichnogo Vyrobnytstva: Pidruchnyk [Technical Electrochemistry. Part III. Galvanic Manufacturing Methods: Textbook] (Eds. B. I. Bayrachny) (Kharkiv: NTU KhPI: 2006) (in Ukrainian).
L. V. Shishkina, S. M. Karabanov, and O. G. Lokshtanov, Electrolytic Coatings of Contact Systems Using Barrier Layers Based on Copper–Nickel, Cobalt–Tungsten and Nickel–Molybdenum Alloys.
K. Yu. Yakovchuk, A. V. Mikitchik, Yu. E. Rudoy, and A. O. Akhtyrsky, Electrometallurgy Today, 4: 36 (2016) (in Russian). Crossref
V. M. Chertov, Barrier Coatings on Stainless Steel.
A. Spiridonov, A. L. Gusev, and Yu. N. Shalimov, Hydrogenation of Nickel Coatings Produced with Direct and Pulsed Current.
S. V. Maksymova, V. V. Voronov, P. V. Kovalchuk, and D. V. Lozbin, Sposib Nanesennya Nikelevoho Pokryttya na Tytan i Yoho Splavy [Method for Applying Nickel Coating on Titanium and its Alloys]: Patent of Ukraine No. 118895, C25D 3/12 (Publ. 25-03-2019, Bull. No. 6) (2019) (in Ukrainian).