Superhard rhenium diboride films: Preparation and characterization

作者：Latini Alessandro^*; Rau Julietta V; Ferro Daniela; Teghil Roberto; Albertini Valerio Rossi; Barinov Sergey M

来源：Chemistry of Materials, 2008, 20(13): 4507-4511.

DOI：10.1021/cm800398s

Recently, the superhardness of rhenium diboride was discovered. This study presents a first successful preparation and characterization of thin ReB(2) films. The films were deposited by the pulsed laser deposition (PLD) technique. The morphology, microstructure, and hardness of the films were investigated. The films are compact and continuous, with a preferred (002) orientation. The composite Vickers hardness of the film-substrate systems was measured, and the intrinsic hardness of the films was separated using an area law-of-mixtures approach taking into account the indentation size effect. The obtained films are found to be superhard: the intrinsic film hardness value (52 GPa) is close to that of the ReB2 bulk.

• 出版日期2008-7-8