Reactive hot pressing of Ti–B–C and Ti–C at 1200°C

Reactive hot pressing of Ti–B–C and Ti–C at 1200°C

Stoichiometric and non-stoichiometric powder mixtures of Ti–B4C and Ti–C with 1wt% Ni were reactively hot pressed at 40MPa, 1200°C for 30min. In both systems, the combined presence of Ni and non-stoichiometry enabled complete densification. While in Ti–C, non-stoichiometry by itself plays a signific...

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Veröffentlicht in:Ceramics international 2013-07, Vol.39 (5), p.5955-5961
Hauptverfasser: Rangaraj, Lingappa, Barman, Kanika, Divakar, Canchi, Jayaram, Vikram
Format: Artikel
Sprache:eng
Schlagworte:
Borides
Carbides
Ceramics
Densification
Hot pressing
Liquids
Nickel
Stoichiometry
Titanium
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Zusammenfassung:Stoichiometric and non-stoichiometric powder mixtures of Ti–B4C and Ti–C with 1wt% Ni were reactively hot pressed at 40MPa, 1200°C for 30min. In both systems, the combined presence of Ni and non-stoichiometry enabled complete densification. While in Ti–C, non-stoichiometry by itself plays a significant role in promoting densification, the formation of intermediate borides in Ti–B4C powder mixtures requires the additional presence of Ni which promotes full reaction through the formation of a transient liquid as established previously in Ti–BN powder mixtures.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2012.12.016