Stable aqeous niobium carbide suspensions for production of homogeneous hard materials
- Hard materials consist of a hard phase embedded in a metallic binder. In order to achieve high toughness and strength, it is necessary to have a perfect mixing of hard phase and binder, which is mainly achieved by ball milling. Niobium carbide (NbC) has a high potential to substitute tungsten carbide as hard material. The publication presents the development of stable homogeneous and de-agglomerated NbC-dispersions. To prevent agglomeration of the powder, stable suspensions were achieved by surface treatments with the dispersants (PD and HD), which resulted in a charge reversal from a negative to a positive zeta potential. This surface-modified powder guaranteed a stable re-dispersion in the binder suspension. Nickel powder was added as metallic binder. This suspension was suited for 3D-printing. The green samples could be sintered in vacuum or Argon atmosphere.
Autor*innen: | Gabriele Steinborn |
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Koautor*innen: | Mathias WoydtORCiD, Marion Gemeinert |
Dokumenttyp: | Posterpräsentation |
Veröffentlichungsform: | Präsentation |
Sprache: | Englisch |
Jahr der Erstveröffentlichung: | 2016 |
DDC-Klassifikation: | Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten |
Freie Schlagwörter: | Niobium carbide powder; Reduction of agglomerates; Stable suspensions |
Veranstaltung: | 91. Jahrestagung der deutschen keramischen Gesellschaft |
Veranstaltungsort: | Freiberg, Germany |
Beginndatum der Veranstaltung: | 07.03.2016 |
Enddatum der Veranstaltung: | 09.03.2016 |
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
Datum der Freischaltung: | 04.04.2016 |
Referierte Publikation: | Nein |