Ultrastrong conductive in situ composite composed of nanodiamond incoherently embedded in disordered multilayer graphene.

ABSTRACT: Traditional ceramics or metals cannot simultaneously achieve ultrahigh strength and high electrical conductivity. The elemental carbon can form a variety of allotropes with entirely different physical properties, providing versatility for tuning mechanical and electrical properties in a wide range. Here, by precisely controlling the extent of transformation of amorphous carbon into diamond within a narrow temperature-pressure range, we synthesize an in situ composite consisting of ultrafine nanodiamond homogeneously dispersed in disordered multilayer graphene with incoherent interfaces, which demonstrates a Knoop hardness of up to ~53 GPa, a compressive strength of up to ~54 GPa and an electrical conductivity of 670-1,240 S m^-1 at room temperature. With atomically resolving inte

SUBMITTER: Li Z 

PROVIDER: S-EPMC9812777 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature