Электронный каталог

Статья

Maletskii, A.V.
Microstructure-Governed Response of ZTA Ceramics to Proton Irradiation: From Degradation to Radiation-Stimulated Reorganization / A.V.Maletskii, R.Sh.Isayev, [a.o.]. – Text : electronic // Journal of Alloys and Compounds. – 2026. – Vol. 1055. – P. 186423. – URL: https://doi.org/10.1016/j.jallcom.2026.186423. – Bibliogr.: 40.

This study demonstrates that the radiation response of zirconia-toughened alumina (ZTA) ceramics can be effectively controlled through microstructural engineering. Composite ceramics (*a-Al&sub(2)O&sub(3) + wt% YSZ, n = 0–15 wt%) were synthesized using metastable *g/*q-Al&sub(2)O&sub(3) nanopowder precursors. By applying different high hydrostatic pressures (HHP: 300 vs. 700 MPa) during green-body compaction, we tailored the formation of either aggregate-strengthened or dispersion-strengthened microstructures during sintering. Irradiation with 2 MeV protons (fluence: 1 × 10&sup(17) cm&sup(− 2) ) revealed a microstructure-dependent dichotomy in behavior. Ceramics with an aggregate-strengthened structure (300 MPa) suffered significant radiation damage, including pore formation and YSZ grain fragmentation. In contrast, dispersion-strengthened ceramics (700 MPa) showed no signs of degradation. Instead, these ceramics radiation-stimulated diffusion, leading to the redistribution of YSZ particles and the formation of extended chain-like structures within the alumina matrix, most pronounced at 10 wt% YSZ. These results establish a direct link between consolidation pressure, engineered microstructure, and macroscopic radiation response, providing a viable design strategy for developing radiation-resistant ZTA ceramics for extreme environments.



Спец.(статьи,препринты) = С 349.1 - Действие излучения на материалы$
ОИЯИ = ОИЯИ (JINR)2026