Phase Composition and Structure of the BrX Chromium Bronze Powder

Authors: Vintaikin B.Е., Smirnov A.E., Shevchenko S.Yu., Drenin A.A., Sheykina V.I. Published: 05.03.2023
Published in issue: #1(106)/2023  
DOI: 10.18698/1812-3368-2023-1-82-94

Category: Physics | Chapter: Condensed Matter Physics  
Keywords: selective laser melting, X-ray phase analysis, scanning electron microscopy, powder material, BrX bronze, 3D printing, growth


Methods of the X-ray phase analysis, as well as optical and scanning electron microscopy supplemented by construction of the distribution maps for such chemical elements as oxygen and copper demonstrated presence in the structure of the PR-BrX brand powder made of bronze with the FСС lattice of oxygen-containing phases, i.e., copper oxides (CuO, Cu2O) located along the grain boundaries and on the powder particle surface. Using these methods demonstrated that annealing in the ammonia at a temperature of 450 °C promoted reduction of the oxide phases to the single-phase structure of the initial solid solution. It was found out that the presence of oxides on the powder particles surface and grain boundaries inside these particles made the oxidized powder unsuitable for use in the selective laser melting technology. This is due to reduction of the oxides, and, consequently, to the outgassing and excessive porosity of objects during the laser 3D printing. It was proved that reductive annealing in ammonia formed a single-phase structure of powder particles based on the FCC copper, which made it possible to grow objects with small porosity not exceeding 2.5 % using various laser processing modes

Please cite this article in English as:

Vintaikin B.E., Smirnov A.E., Shevchenko S.Yu., et al. Phase composition and structure of the BrX chromium bronze powder. Herald of the Bauman Moscow State Technical University, Series Natural Sciences, 2023, no. 1 (106), pp. 82--94 (in Russ.). DOI: https://doi.org/10.18698/1812-3368-2023-1-82-94


[1] Mysik R.K., Loginov Yu.N., Brusnitsyn S.V., et al. Prospects for the application of chromium and chromium-zirconium bronzes. Tsvetnye metally, 2004, no. 2, pp. 38--41 (in Russ.).

[2] Islamgaliev R.K., Nesterov K.M., Bourgon J., et al. Nanostructured Cu--Cr alloy with high strength and electrical conductivity. J. Appl. Phys., 2014, vol. 115, iss. 19, art. 194301. DOI: https://doi.org/10.1063/1.4874655

[3] Smirnov A.E., Shevchenko S.Yu., Shevchukov A.P., et al. Study of structure and properties of beryllium bronze after high pressure nitrogen quenching. Tekhnologiya metallov, 2018, no. 4, pp. 25--30 (in Russ.).

[4] Grigoryants A.G., ed. Lazernye additivnye tekhnologii v mashinostroenii [Laser additive technologies in machine building]. Moscow, BMSTU Publ., 2018.

[5] Kolchanov D.S., Perestoronin A.V., Binkov I.I., et al. Impact of aluminum powder parts growth by method of selective laser melting upon porosity, micro-hardness and micro-structure. Naukoemkie tekhnologii v mashinostroenii [Science Intensive Technologies in Mechanical Engineering], 2020, no. 10 (112), pp. 40--48 (in Russ.). DOI: https://doi.org/10.30987/2223-4608-2020-10-40-48

[6] Grigoryants A.G., Kolchanov D.S., Tretyakov R.S., et al. Selective laser melting of metallic powders, growing thin-walled and mesh structures. Tekhnologiya mashinostroeniya, 2015, no. 10, pp. 6--11 (in Russ.).

[7] Aleksandrova A.A., Bazaleeva K.O., Balakirev E.V., et al. Direct laser growth of inсonel 625/TiC composite: effect of structural state of initial powder. Phys. Metals Metallogr., 2019, vol. 120, no. 5, pp. 459--464. DOI: https://doi.org/10.1134/S0031918X19020017

[8] Panchenko V.Ya., Vasiltsov V.V., Egorov E., et al. Metal powder sintering additive technologies for aviation and engineering industries. Fotonika [Photonics Russia], 2016, no. 6, pp. 36--47 (in Russ.). DOI: https://doi.org/10.22184/1993-7296.2016.

[9] Kolchanova A.V., Grigoryants A.G., Kolchanov D.S., et al. Obtaining composite products with a metal matrix by selective laser melting. Tekhnologiya mashinostroeniya, 2020, no. 12, pp. 5--11 (in Russ.).

[10] Kolchanov D.S., Drenin A.A., Denezhkin A.O., et al. Study of the effect of growing modes by selective laser melting method on porosity in copper alloy products. Fotonika [Photonics Russia], 2019, vol. 13, no. 2, pp. 160--168 (in Russ.). DOI: https://doi.org/10.22184/FRos.2019.

[11] Grigoryants A.G., Kolchanov D.S., Drenin A.A., et al. Influence of the main parameters of selective laser melting on stability of single-track formation when ‘growing’ parts from copper alloys. BMSTU Journal of Mechanical Engineering, 2019, no. 6 (711), pp. 20--29 (in Russ.). DOI: http://dx.doi.org/10.18698/0536-1044-2019-6-20-29

[12] Grigoryants A.G., Kolchanov D.S., Drenin A.A. [Installation for selective laser melting of metal powders] Additivnye tekhnologii: nastoyashchee i budushchee. Mater. IV Mezhdunar. konf. [Additive Technologies: the Present and the Future. Proc. IV Int. Conf.]. Moscow, VIAM, 2018, pp. 221--234 (in Russ.).

[13] Guinier A. Theorie et teghnique de la radiocristallographie. Paris, Dunod, 1956.

[14] Vintaykin B.E., Kamynin A.V., Smirnov A.E., et al. Phase transformations in a precision 40KhNYu-VI nickel alloy during heat treatment and nitriding. Metally, 2019, no. 4, pp. 25--32 (in Russ.).

[15] Vintaykin B.E., Kuzmin R.N. Separation of hardware broadening and Ka2 component and Ka-doublet on two-dimensional maps of X-ray scattering intensity distribution by direct variational methods on the computer. Kristallografiya, 1986, vol. 31, no. 4, pp. 656--660 (in Russ.).

[16] Drits M.E., ed. Dvoynye i mnogokomponentnye sistemy na osnove medi [Dual and multi-component copper-based systems]. Moscow, Nauka Publ., 1979.

[17] Melnikova M.A., Kolchanov D.S., Melnikov D.M. Selective laser melting: application and formation features of three-dimensional structural engineering elements. Fotonika [Photonics Russia], 2017, no. 2, pp. 42--49 (in Russ.). DOI: https://doi.org/10.22184/1993-7296.2017.