Journals →  Tsvetnye Metally →  2022 →  #10 →  Back

ArticleName Understanding the structural phase state of bulk amorphous/crystalline alloys obtained from Zr35Ti30Be27,5Cu7,5 powder
DOI 10.17580/tsm.2022.10.10
ArticleAuthor Suchkov A. N., Bazdnikina E. A., Kazakova V. N., +Kalin B. A., Samokhin A. V.

National Research Nuclear University MEPhI, Moscow, Russia:

A. N. Suchkov, Associate Professor, Candidate of Technical Sciences
E. A. Bazdnikina, Engineer, e-mail:
V. N. Kazakova, Engineer
+B. A. Kalin (1935–2021)


Baikov Institute of Metallurgy and Materials Science at the Russian Academy of Sciences, Moscow, Russia:
A. V. Samokhin, Lead Researcher, Candidate of Technical Sciences


The paper describes a method for obtaining Ti- and Zr-base near-eutectic alloys in the form of powders with a high degree of sphericity and a narrow size distribution of powder particles. Thus, a Zr35Ti30Be27,5Сu7,5 alloy powder with a particle sphericity of more than 97% and a particle size distribution of 63–100 μm was produced using the method of plasma spheroidization of fragmented powders obtained by grinding amorphous rapid-quenched strips. The final state of spherical particles has an X-ray amorphous structure, as indicated by a broad halo of scattered intensity typical of amorphous materials. An even distribution of chemical elements across the particle section could be observed. Bulk samples were made using the method of spark plasma sintering and applying varying parameters of temperature and dwelling time. The authors looked at the microstructure and microhardness of the bulk samples and carried out an X-ray phase analysis. The samples were found to have an X-ray amorphous structure during spark plasma sintering in the temperature range of 320 to 340 оC. However, at the temperatures of 320–325 оC, the resulting samples have a high internal porosity, which cannot be fixed with a pressure rise. The greatest compaction is achieved at the temperatures of 335 to 340 оC. By varying the dwelling time, the authors determined the optimal regime for producing bulk amorphous alloys: sintering at 340 оC and the pressure of 50 MPa, dwelling for 15 min followed by cooling at the rate of 80 оC/min. The samples produced in the above conditions have no visible porosity, and their microhardness is closest to that registered in cast samples.
Contributors to this research include O. N. Sevryukov, Associate Professor, Candidate of Technical Sciences; P. V. Morokhov, Lead Engineer; P. S. Dzhumaev, Associate Professor, Candidate of Technical Sciences; I. V. Kozlov, Engineer; V. V. Mikhalchik, Senior Lecturer, Candidate of Technical Sciences; D. S. Gorbunov, Senior Lab Assistant (National Research Nuclear University MEPhI); A. A. Fadeev, Research Fellow; I. D. Zavertyaev, Junior Researcher (Baikov Institute of Metallurgy and Materials Science at the Russian Academy of Sciences).

keywords Zr-base alloy, active alloys, metal powders, plasma spheroidization, rapid quenching, heat treatment, sphericity, spark plasma sintering

1. Gabor C., Cristea D., Velicu I.-L. Ti–Zr–Si–Nb nanocrystalline alloys and metallic glasses: assessment on the structure, thermal stability, corrosion and mechanical properties. Materials Basel. 2019. Vol. 12. pp. 1551–1560.

2. Lashgari H. R., Ferry M., Li S. Additive manufacturing of bulk metallic glasses: Fundamental principle, current/future developments and applications. Journal of Materials Science & Technology. 2022. Vol. 119. pp. 131–149.
3. Schroers J., Kumar G., Hodges T. M., Chan S. et al. Bulk metallic glasses for biomedical applications. Biomedical Materials and Devices. 2009. Vol. 61, Iss. 9. pp. 21–29.
4. Axinte E. Metallic glasses from “alchemy” to pure science: Present and future of design, processing and applications of glassy metals. Materials and Design. 2012. Vol. 35. pp. 518–556.
5. Su S., Lu Y. Laser directed energy deposition of Zr-based bulk metallic glass composite with tensile strength. Materials Letters. 2019. Vol. 247. pp. 79–81.
6. Soares-Barreto E., Frey M., Wegner J., Jose A. et al. Properties of gasatomized Cu – Ti-based metallic glass powders for additive manufacturing. Materials and Design. 2022. Vol. 215. pp. 1–11.
7. Bazdnikina E. A., Suchkov A. N., Sevryukov O. N., Samokhin A. V. et al. Globular powders of filler metals VPr27 and VPr50 produced by gas atomization and plasma spheroidization of rapid-quenched fragmented particles: A comparative study. Tekhnologiya Mashinostroeniya. 2022. Iss. 4. pp. 12–20.
8. Kachenyuk M. N., Smetkin A. A. Structural evolution of compositional particles during mechanical activation of titanium, silicon carbide and carbon powders. Sovremennye problemy nauki i obrazovaniya. 2014. Iss. 6. pp. 111–117.
9. Samokhin A. V., Alekseev N. V., Fadeev A. A. et al. Spheroidization of Febased powders in plasma jet of DC arc plasma torch and application of these powders in selective laser melting. Inorganic Materials: Applied Research. 2020. pp. 579–585.
10. Samokhin A. V., Fadeev A. A., Alekseev N. V. et al. Plasma jet spheroidization of iron-base powders and their application in selective laser melting. Fizika i khimiya obrabotki materialov. 2019. No. 4. pp. 12–20.
11. Samokhin A., Tsvetkov Yu., Alekseev N. et al. Plasma spheroidization of micropowders of a heat-resistant nickel mono-aluminide alloy. Doklady Akademii nauk. 2018. Vol. 483, No. 4. pp. 403–408.
12. ASTM B822-10. Standard test method for particle size distribution of metal powders and related compounds by light scattering. 2010. 4 p.
13. GOST 19440–94. Metallic powders. Determination of apparent density. Introduced: 01.01.1997.
14. GOST 20899–98 (ISO 4490–78). Metallic powders. Determination of flowability by means of a calibrated funnel (Hall flowmeter). Introduced: 01.07.2001.

Language of full-text russian
Full content Buy