Good news! This could be a major breakthrough!
My next coffee mug will never break again! Just kidding!
"Lattice-matching prevents brittleness usually associated with ceramics"
"A new technique allows ceramics to become more ductile without losing their strength. It involves the controlled growth of a metal layer on the ceramic surface, which allows its structure to rearrange under stress rather than failing. The researchers behind the work suggest that the method could allow ceramics to be used in biomedical and aerospace applications for which they are currently ill-suited. ...
In the new work, Chen and her colleagues combined the properties of ceramics and metals by literally combining the two materials. The researchers used mixed aqueous precursors of lanthanum oxide and molybdenum in solution before drying and sintering the resulting gel. The material comprised strongly bonded, lattice-matched layers of metal and ceramic. ..."
From the editor's summary and abstract:
"Editor’s summary
Ceramics break instead of deforming plastically, which can be partially attributed to their low number of dislocation defects compared with more ductile materials such as metals. Dong et al. show that by carefully choosing a ceramic-metal interface, the dislocation defects generated in the metal during straining can migrate into the ceramic. The result is a dramatic improvement in the tensile properties, suggesting a different way to improve the properties of brittle ceramics. ...
Abstract
The inherent brittleness of ceramics, primarily due to restricted atomic motions from rigid ionic or covalent bonded structures, is a persistent challenge. This characteristic hinders dislocation nucleation in ceramics, thereby impeding the enhancement of plasticity through a dislocation-engineering strategy commonly used in metals. Finding a strategy that continuously generates dislocations within ceramics may enhance plasticity. Here, we propose a “borrowing-dislocations” strategy that uses a tailored interfacial structure with well-ordered bonds. Such an approach enables ceramics to have greatly improved tensile ductility by mobilizing a considerable number of dislocations in ceramic borrowed from metal through the interface, thereby overcoming the challenge associated with direct dislocation nucleation within ceramics. This strategy provides a way to enhance tensile ductility in ceramics."
P.S. I hate when science journals systematically reduce the first names of researchers to their initials!!!! Bad practice!!!!
Science is published by Marxist ideologues of AAAS! I believe, this is also ideologically driven. This article's last author is a female, Kexin Chen (Tsinghua University)! Google Scholar does not even have a profile on her (see screen print below)!!!!
The publisher of her book (Elsevier) does not have a profile on her either!!!!
Borrowed dislocations for ductility in ceramics (no public access)
Chen’s team report that the glide of partial dislocations in the layered structure relieves stress in the material
Researcher Kexin Chen presumably published also this book
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