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Title:

Recent search for new superhard materials: Go nano!

Author(s):
Veprek, Stan
Abstract:
High elastic moduli do not guarantee high hardness because upon finite shear electronic instabilities often occur that result in transformation to softer phases. Therefore, the author concentrates on the extrinsically superhard nanostructured materials, which are the most promising. Decreasing crystallite size results in strengthening and hardening because the grain boundaries impede the plasticity (e.g., Hall–Petch strengthening in case of dislocation activity). However, this hardening is...     »
Journal title:
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
Year:
2013
Journal volume:
31
Journal issue:
5
Fulltext / DOI:
doi:10.1116/1.4818590
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