Ultra-Refractory Hf₄ZrC₅–(Hf,Zr)B₂ Composites by Electrothermal Explosion under Pressure

V. A. Shcherbakov^a^, *, A. N. Gryadunov^a^, **, and M. I. Alymov^a

^a Merzhanov Institute of Structural Macrokinetics and Materials Science (ISMAN), Russian Academy of Sciences, Chernogolovka, 142432 Russia

Correspondence to: *e-mail: vladimir@ism.ac.ru
Correspondence to: **e-mail: gryadunov@ism.ac.ru

Received 3 November, 2020

Abstract—Ultra-refractory Hf₄ZrC₅–(Hf,Zr)B₂ composites were prepared by electrothermal explosion (ETE) under pressure in a one-stage process, with special emphasis on the influence of high-energy ball milling (HEBM) of starting Hf–Zr–C–B powder mixtures. Synthesized Hf₄ZrC₅–(Hf,Zr)B₂ composites had a grain size of 0.5–1.0 μm and a porosity of 10–12%.

Keywords: exothermic synthesis, electrothermal explosion under pressure, HEBM, Hf₄ZrC₅–(Hf,Zr)B₂ composite

DOI: 10.3103/S1061386221010118

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Ultra-Refractory Hf₄ZrC₅–(Hf,Zr)B₂ Composites by Electrothermal Explosion under Pressure