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.
Superhard rhenium diboride films: Preparation and characterization / Latini, Alessandro; Julietta V., Rau; Ferro, Daniela; Roberto, Teghil; Valerio Rossi, Albertini; Sergey M., Barinov. - In: CHEMISTRY OF MATERIALS. - ISSN 0897-4756. - 20:13(2008), pp. 4507-4511. [10.1021/cm800398s]
Superhard rhenium diboride films: Preparation and characterization
LATINI, ALESSANDRO;FERRO, DANIELA;
2008
Abstract
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
