In search of amorphization-resistant boron carbide

G Subhash, AP Awasthi, C Kunka, P Jannotti… - Scripta Materialia, 2016 - Elsevier
Scripta Materialia, 2016Elsevier
Despite its superior mechanical properties, boron carbide suffers from amorphization, a
pressure-induced phenomenon that disturbs crystalline order and likely reduces shear
strength. Numerous experimental and computational studies have investigated the structure
and origins of amorphization, yet strategies to mitigate this deleterious phenomenon elude.
However, recent investigations have revealed three new research avenues for addressing
this issue. First, we identify crystallographic cage spaces that may accommodate foreign …
Abstract
Despite its superior mechanical properties, boron carbide suffers from amorphization, a pressure-induced phenomenon that disturbs crystalline order and likely reduces shear strength. Numerous experimental and computational studies have investigated the structure and origins of amorphization, yet strategies to mitigate this deleterious phenomenon elude. However, recent investigations have revealed three new research avenues for addressing this issue. First, we identify crystallographic cage spaces that may accommodate foreign atoms to potentially prevent structural collapse. Second, we propose polymorph-level tailoring through strict control of processing conditions. Finally, we demonstrate that reducing grain size to nanometer scale increases hardness and may counter amorphization.
Elsevier
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