Kinetics and mechanism of mechanochemical synthesis of hafnium nitride ceramics in a planetary ball mill

Journal Article · Wed Sep 25 00:00:00 EDT 2019 · Ceramics International

DOI:https://doi.org/10.1016/j.ceramint.2019.08.224· OSTI ID:1631975

Nepapushev, A. A. ^[1]; Buinevich, V. S. ^[1]; Gallington, L C ^[2]; Pauls, J. M. ^[3]; Orlova, T. ^[4]; Miloserdova, O. M. ^[5]; Chapysheva, N. V. ^[5]; Rogachev, A. S. ^[6]; Mukasyan, A. S. ^[3]

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1. National Univ. of Science and Technology “MISiS,” Moscow (Russia)
2. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
3. Univ. of Notre Dame, IN (United States). Dept. of Chemistry and Biochemistry
4. Univ. of Notre Dame, IN (United States)
5. Russian Academy of Sciences (RAS), Moscow (Russian Federation)
6. National Univ. of Science and Technology “MISiS,” Moscow (Russia) ; Russian Academy of Sciences (RAS), Moscow (Russian Federation)

Mechanochemical synthesis of hafnium nitride ceramic powder was accomplished through direct nitridation of hafnium particles in nitrogen atmosphere during high-energy milling in a planetary ball mill. The nitrogen content was measured and evaluated to determine the reaction kinetics for hafnium - nitrogen across a range of treatment durations. The observed reaction rates are notably faster than for conventional thermal treatment and, for hafnium treated for 5 min in the ball mill, the onset of nitridation begins at a temperature 200 degrees C Lower than for the initial hafnium metal. The crystal structure and microstructure transformations were also investigated. A mechanism for the rapid hafnium nitridation occurring under high-energy ball milling conditions is proposed and discussed. Based on this proposed mechanism of metal nitridation via ball mill treatment in nitrogen atmosphere, we may suggest this process as an effective method for fabrication of fine (sub-micron hafnium nitride powder from relatively large (10-100 mu m) initial metal particles.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• Grant/Contract Number: AC02-06CH11357; NA0002377
• OSTI ID: 1631975
• Alternate ID(s): OSTI ID: 1703520
• Journal Information: Ceramics International, Journal Name: Ceramics International Journal Issue: PA Vol. 45; ISSN 0272-8842
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
formation mechanism
hafnium nitride
kinetics of nitridation
mechanochemical Synthesis
nitride synthesis
sub-micron ceramic powder