| Interfacial Microstructure and Mechanical Properties
of B4C/W Functionally Graded Materials by Spark
Plasma Sintering |
Yuting Li,a Mingyong Jia,a,* Yueqi Wu,a Chi Zhang,a Yaojun Lina and Fei Chena, b,*
Pages : 57-63
DOI : 10.1080/0371750X.2025.2476518 |
| Abstract |
| Integrating boron carbide ceramics (B4C) with tungsten (W) presents great potential
for the development of advanced shielding materials. This study focuses on achieving
exceptional bonding between B4C and W by fine-tuning the graded interfaces guided by
the comprehensive thermodynamic reaction information. The results show that as the
W content increases in the graded interlayers, the unstable entropy between B4C and
W system drives the reaction progress along the following stages, W2B5 ï‚® W2B5 + WB
ï‚® WB + WC ï‚® W2B + W2C. The multi-scale cracks within B4C/W composites and B4C/W
graded materials are mainly due to mismatched properties and inherent brittleness of
the induced interphases, which can be effectively mitigated by reducing phases such
as WB and WC.
[Keywords: Boron carbide ceramics, Tungsten, Functionally graded materials,
Thermodynamic reactions] |
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