Silicon nitride (Si₃N₄) is an excellent candidate for engineering ceramics; however, its toughness and hardness are fundamentally limited by the inherent incompatibility between the hard α-phase and the tough β-phase. Si₃N₄ ceramics with a columnar-cluster microstructure are reported, achieving combination of toughness of 10.2 ± 0.3 MPa·m^1/2and 20.1 ± 0.3 GPa hardness. Those values represent the state-of-the-art among Si₃N₄ ceramics fabricated via liquid-phase sintering reported to date. The formation of the columnar clusters is driven by a high-pressure-induced coarsening process. The metastable growth mechanism may open a new pathway for preparing a new generation of Si₃N₄ ceramics with superior performance.

Study confirms public observations match professional records for common felid species, guiding better conservation monitoring.

In the realm of pulse power capacitors, dielectric energy storage materials are undeniably the "heart." As global demand surges for rapid charge-discharge capabilities, high operating voltages, and long service lives, these materials play a pivotal role in sectors ranging from hybrid electric vehicles to high-energy weapon ignition systems.

However, Barium Titanate (BaTiO₃, or BT), the poster child for lead-free ferroelectrics, faces a classic trade-off. While blessed with high polarization strength, it has long been plagued by a "shortcoming": low breakdown strength (typically E_b<1000 kV cm⁻¹).

It is akin to a "seesaw" dilemma: achieving high energy storage density often comes at the expense of breakdown strength, while striving for high voltage tolerance can lead to insufficient polarization. Consequently, the key scientific hurdle for researchers is how to actively construct functional nanodomain structures within the BT system while maintaining its high polarization performance.