Key points are not available for this paper at this time.
Covalently bonded ceramics exhibit preeminent properties-including hardness, strength, chemical inertness, and resistance against heat and corrosion-yet their wider application is challenging because of their room-temperature brittleness. In contrast to the atoms in metals that can slide along slip planes to accommodate strains, the atoms in covalently bonded ceramics require bond breaking because of the strong and directional characteristics of covalent bonds. This eventually leads to catastrophic failure on loading. We present an approach for designing deformable covalently bonded silicon nitride (Si3N4) ceramics that feature a dual-phase structure with coherent interfaces. Successive bond switching is realized at the coherent interfaces, which facilitates a stress-induced phase transformation and, eventually, generates plastic deformability.
Building similarity graph...
Analyzing shared references across papers
Loading...
Jie Zhang
Guanghua Liu
Wei Cui
Science
Tsinghua University
University of Chinese Academy of Sciences
State Key Laboratory of New Ceramics and Fine Processing
Building similarity graph...
Analyzing shared references across papers
Loading...
Zhang et al. (Thu,) studied this question.
www.synapsesocial.com/papers/69d8ac58945c639271bedb76 — DOI: https://doi.org/10.1126/science.abq7490