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Now showing items 71-76 of 76
Nanotwins soften boron-rich boron carbide (B13C2)
(2017)
Extensive studies of metals and alloys have observed that nanotwins lead to strengthening, but the role of nanotwins in ceramics is not well established. We compare here the shear strength and the deformation mechanism of ...
Atomistic explanation of brittle failure of thermoelectric skutterudite cosb3
(American Chemical Society, 2016)
Skutterudites based on CoSb3 have high thermoelectric efficiency, but the low fracture strength is a serious consideration for commercial applications. To understand the origin of the brittleness in CoSb3, we examine the ...
Breaking the icosahedra in boron carbide
(National Academy of Sciences, 2016)
Findings of laser-assisted atom probe tomography experiments on boron carbide elucidate an approach for characterizing the atomic structure and interatomic bonding of molecules associated with extraordinary structural ...
Asymmetric twins in boron rich boron carbide
(Royal Society of Chemistry, 2018)
Twin boundaries (TBs) play an essential role in enhancing the mechanical, electronic and transport properties of polycrystalline materials. However, the mechanisms are not well understood. In particular, we considered that ...
Fractal atomic-level percolation in metallic glasses
(American Association for the Advancement of Science, 2015)
Metallic glasses are metallic alloys that exhibit exotic material properties. They may have fractal structures at the atomic level, but a physical mechanism for their organization without ordering has not been identified. ...
Shear-Induced Brittle Failure along Grain Boundaries in Boron Carbide
(American Chemical Society, 2018)
The role that grain boundaries (GBs) can play on mechanical properties has been studied extensively for metals and alloys. However, for covalent solids such as boron carbide (B4C), the role of GB on the inelastic response ...