Email this article Preparation of HfB2/SiC composite powders by sol–gel technology
- Authors: Simonenko E.P.1, Simonenko N.P.1, Sevastyanov V.G.1, Kuznetsov N.T.1
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Affiliations:
- Kurnakov Institute of General and Inorganic Chemistry
- Issue: Vol 61, No 12 (2016)
- Pages: 1483-1498
- Section: Synthesis and Properties of Inorganic Compounds
- URL: https://bakhtiniada.ru/0036-0236/article/view/166933
- DOI: https://doi.org/10.1134/S0036023616120172
- ID: 166933
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Abstract
Sol–gel technology was used to chemically modify the surface of HfB2 powders with highly dispersed silicon carbide using two carbothermy protocols: (1) under heating to 1500°С in flowing argon (100 mL/min) without exposure and (2) under dynamic vacuum conditions (p ~ 1 × 10–5–1 × 10–6 MPa) at 1400°С with 4-h exposure. The phase composition and microstructural features of the thus-prepared HfB2/xSiC (x = 10–65 vol %) composite powders were studied. The products prepared by the second protocol showed an enhanced oxidation resistance in the range 20–1400°C in flowing air compared to individual HfB2.
About the authors
E. P. Simonenko
Kurnakov Institute of General and Inorganic Chemistry
Author for correspondence.
Email: ep_simonenko@mail.ru
Russian Federation, Leninskii pr. 31, Moscow, 119991
N. P. Simonenko
Kurnakov Institute of General and Inorganic Chemistry
Email: ep_simonenko@mail.ru
Russian Federation, Leninskii pr. 31, Moscow, 119991
V. G. Sevastyanov
Kurnakov Institute of General and Inorganic Chemistry
Email: ep_simonenko@mail.ru
Russian Federation, Leninskii pr. 31, Moscow, 119991
N. T. Kuznetsov
Kurnakov Institute of General and Inorganic Chemistry
Email: ep_simonenko@mail.ru
Russian Federation, Leninskii pr. 31, Moscow, 119991
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