Abstract
Structure and phase formation during the deposition of coatings of the Ti-Al-Ni system (Al ≈ 3.5 at %) by the ion-plasma method are investigated. The controlled process parameter was the bias potential (U b) applied to the substrate made of the VK6 hard alloy. At U b = 120 V (samples of group 1), titanium nitride close to the stoichiometric composition and solid solution of Al in α-Ti are formed, while at U b = 120 V (group 2), nonstoichiometric titanium nitride and complex nitride (Ti, Al)N are formed. The hardness and elasticity modulus for coatings of group 1 were equal to 23.8 GPa and 462 GPa, and for group 2 they were 30.8 GPa and 565 GPa, respectively. The latter are characterized by a level of adhesion strength of 53–55 N as opposed to 39–40 N for coatings of group 1. Qualification tests for the durability of the cutting tool with developed coatings are performed. For example, upon turning steel 45, it increases by a factor of 6.3 and for gray cast iron it increases by a factor of 5; during end milling cut of the EI 698-VD alloy it increases by a factor of 2.5.
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Original Russian Text © V.N. Anikin, I.V. Blinkov, A.O. Volkhonskii, N.A. Sobolev, S.G. Tsareva, R.V. Kratokhvil, A.E. Frolov, 2009, published in Izvestiya VUZ. Poroshkovaya Metallurgiya i Funktsional’nye Pokrytiya, 2009, No. 1, pp. 44–52.
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Anikin, V.N., Blinkov, I.V., Volkhonskii, A.O. et al. Ion-plasma Ti-Al-N coatings on a cutting hard-alloy tool operating under conditions of constant and alternating-sign loads. Russ. J. Non-ferrous Metals 50, 424–431 (2009). https://doi.org/10.3103/S1067821209040233
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DOI: https://doi.org/10.3103/S1067821209040233