Superior plastic flow stability of self-patterned carbide – amorphous ceramic nanostructures
Year: 2025
Type: article
Abstract: Amorphous ceramics and carbides exhibit superb strength but poor plasticity. Here, we synthesized TiC-SiOC nanostructures with TiC-nanocarbides embedded in amorphous ceramic SiOC by co-sputtering followed by high-temperature annealing and/or irradiation. TiC-SiOC nanostructures exhibit high strength and good plastic flow stability even after heavy irradiation, 7 GPa at room temperature and 3.6 GPa at 700 ℃ with a uniform strain of about 10%∼18%. The uniform deformation is accommodated by the shearing of amorphous ceramic and the rotation of nanocarbides. Nanocarbides inhibit the propagation of shear banding in amorphous SiOC, and amorphous-crystal interfaces act as sinks to manage irradiation-induced defects. Amorphous ceramics and carbides exhibit superb strength but poor plasticity. Dual-phase heterogeneous nanostructures with nanocarbides self-patterned in nanosized amorphous ceramics exhibit ultra-high strength and plastic flow stability as well as retain highly stable microstructure under high temperature, irradiation, and mechanical loading.
Source: Figshare
Authors: Wu, Wenqian, Shao, Lin, Li, Nan, Li, Lin, Wang, Jian
Language: English
Subfield: Ceramics and Composites
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W6902285414
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