Consolidation, microstructure, and mechanical properties of a TiB{sub 2}-Ni{sub 3}Al composite
- UPV-EHU, Vitoria (Spain). Dept. Quimica Inorganica
- CEIT, San Sebastian (Spain). Dept. Materiales
Since the use of metallic additives for the consolidation of tough TiB{sub 2}-based materials results in a remarkable decrease of their hardness and oxidation resistance, the use of intermetallic compounds as binders for these materials has been thought to be an alternative choice. Taking into account the thermochemical behavior of TiB{sub 2} in contact with metallic elements and the desired mechanical properties for the resulting TiB{sub 2} composites, Ni{sub 3}Al was selected as a suitable candidate. TiB{sub 2} + Ni + TiAl{sub 3} compacts were sintered by either pressureless sintering or hot isostatic pressing (HIP) at different temperatures up to 1,600 C in order to obtain TiB{sub 2}-Ni{sub 3}Al specimens. Fully dense specimens were obtained after HIP and subsequently microstructurally and mechanically characterized. Comparison between TiB{sub 2}-Ni{sub 3}Al composites and some other selected TiB{sub 2}-based ceramics and cermets shows that a better hardness/toughness compromise has been obtained for materials with the intermetallic binder.
- OSTI ID:
- 352410
- Journal Information:
- Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 1 Vol. 34; ISSN MRBUAC; ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
Similar Records
Comparison of vacuum and pressure-assisted sintering of TiB{sub 2}-Ni
Fe-Ni-Ti binder phases for TiB{sub 2}-based cermets: A thermodynamic approach