Impurity-induced formation of Ti₁₋ₓZrₓB₂ solid solution ceramics during combined SHS-SPS sintering
Combination of self-propagating high-temperature synthesis (SHS) from Ti + B powder mixture followed by spark plasma sintering (SPS) is introduced for the fabrication of titanium diboride. Oxide impurities, including zirconium oxide and titanium oxide, are identified in the synthesized powders: the...
| Autores: | , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2026 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/415764 |
| Acceso en línea: | http://hdl.handle.net/10261/415764 https://api.elsevier.com/content/abstract/scopus_id/105022463186 |
| Access Level: | acceso abierto |
| Palabra clave: | Self-propagating high-temperature synthesis (SHS) Sliding wear Spark plasma sintering (SPS) TiB2 |
| Sumario: | Combination of self-propagating high-temperature synthesis (SHS) from Ti + B powder mixture followed by spark plasma sintering (SPS) is introduced for the fabrication of titanium diboride. Oxide impurities, including zirconium oxide and titanium oxide, are identified in the synthesized powders: the first one coming from the milling process after SHS to minimize agglomeration and the second one is a common oxide fine layer on particle surface. Both oxide phases are reduced during SPS treatment. Results confirm that increasing the SPS temperature enhances the reduction of ZrO₂, facilitating the incorporation of Zr cations into the lattice through substitution at Ti sites, thus allowing the formation of this solid solution diboride: Ti<inf>1-x</inf>Zr<inf>x</inf>B<inf>2</inf>. The key finding is that the presence of a small amount of Zr cation, with higher atomic radius in TiB<inf>2</inf> crystal structure results in crystal distortion and it creates significant solid solution hardening effect as well as an improved wear response. |
|---|