Journal
ADVANCED MATERIALS
Volume 31, Issue 11, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201807326
Keywords
ceramics; dynamic covalent polymers; plasticity; siloxane equilibration
Categories
Funding
- National Key Basic Research Program of China [2015CB351903]
- National Natural Science Founds for Distinguished Young Scholar [21625402]
- National Natural Science Foundation of China [21474084, 21474090, 51673169]
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Shaping ceramics into complex 3D geometries is desirable yet challenging, particularly those with structural hierarchy spanning different length scales. A mechano-plastic pyrolysis process that overcomes this limitation is reported. In addition to taking advantage of the moldability of organic polymers, the process uniquely incorporates mechano-plasticity via dynamic covalent bond exchange for reconfiguring the shape of a preceramic polymer. The combined steps result in simultaneous shape control at both micro- and macro-scales. Further pyrolysis leads to complex ceramic structures that are otherwise difficult to produce. To enable this process, rational design of the polymer network is required to satisfy an unusual combination of mechanoplasticity and pyrolysis. Overall, the process offers an avenue for efficient fabrication of hierarchical 3D ceramic structures suitable for engineering applications.
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