Work

Establishment of printable and pressureless sinterable ZrB2-B4C-C composite: A resin-free formulation with sintering aids compatible with aqueous suspensions

Year: 2026

Type: article

Abstract: This study explores how boron carbide (B 4 C) and carbon additives affect densification, microstructure, and direct ink writing (DIW) suitability of aqueous-based ZrB 2 composites. An alternative to nano-B 4 C powder and phenolic resin is explored. Dilatometry and microstructural analyses reveal that densification depends on B 4 C particle size and content, as well as carbon type. Fine B 4 C and graphite enhance packing, oxide reduction, and densification, while excessive additives or poor dispersion cause agglomeration and porosity. The optimal composition, ZrB 2 –6 wt% fine B 4 C–2 wt% graphite, achieved high density, homogeneous microstructure, and good mechanical properties under pressureless sintering. Successfully adapted for DIW, it enabled fabrication of complex components, pressureless sintered at 2200°C with limited property degradation compared to cold isostatic pressing. These results emphasize the importance of additive, rheological optimization for ZrB 2 additive manufacturing and the impact of aqueous formulation.

Source: Journal of the European Ceramic Society

DOI: 10.1016/j.jeurceramsoc.2026.118964

Authors: Flavie Lebas, Frédérine Marie, Sylvain Marinel, Charles Manière

Institutions: Centre National de la Recherche Scientifique, École Nationale Supérieure d'Ingénieurs de Caen, Normandie Université, Laboratoire de Cristallographie et Sciences des Matériaux, Université de Caen Normandie

Language: English

Topic: Advanced ceramic materials synthesis

Subfield: Ceramics and Composites

Field: Materials Science

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: hybrid

Estimated APC paid: $3,900