Elastic and mechanical softening in boron-doped diamond.

ABSTRACT: Alternative approaches to evaluating the hardness and elastic properties of materials exhibiting physical properties comparable to pure diamond have recently become necessary. The classic linear relationship between shear modulus (G) and Vickers hardness (H_V), along with more recent non-linear formulations based on Pugh's modulus extending into the superhard region (H_V > 40 GPa) have guided synthesis and identification of novel superabrasives. These schemes rely on accurately quantifying H_V of diamond-like materials approaching or potentially exceeding the hardness of the diamond indenter, leading to debate about methodology and the very definition of hardness. Elasticity measurements on such materials are equally challenging. Here we used a high-precision,

SUBMITTER: Liu X 

PROVIDER: S-EPMC5324052 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature