This work reports on the structural and mechanical properties of Ni-C films, deposited on silicon substrates by r. f. magnetron sputtering of a plasma-sprayed Ni-C target. The X-ray diffraction was used to determine the phase structure, while the atomic composition and the chemical states were given by X-ray photoelectron and Auger electron spectroscopies. The internal stress, Young`s modulus, hardness and scratch resistance were investigated, as a function of the r. f. electric power. The microstructure and the mechanical properties were found to be governed by the kinetic energy transferred to the growing film. In the conditions of low energy, the Ni-C films behaved mechanically as diamond-like carbons, and the microstructure coincided with that of an amorphous C-fcc Ni composite. Inversely, in high energy growth conditons, the films were composed of dispersed Ni3C small crystallites in an amorphous Ni-C mixture. Such a microstructure was characterized by low mechanical properties
Mechanical and Structural properties of Ni-C Films Obtained by R.F. Sputtering
Bensaada Laidani, Nadhira;Calliari, Lucia;Speranza, Giorgio;Micheli, Victor;
1998-01-01
Abstract
This work reports on the structural and mechanical properties of Ni-C films, deposited on silicon substrates by r. f. magnetron sputtering of a plasma-sprayed Ni-C target. The X-ray diffraction was used to determine the phase structure, while the atomic composition and the chemical states were given by X-ray photoelectron and Auger electron spectroscopies. The internal stress, Young`s modulus, hardness and scratch resistance were investigated, as a function of the r. f. electric power. The microstructure and the mechanical properties were found to be governed by the kinetic energy transferred to the growing film. In the conditions of low energy, the Ni-C films behaved mechanically as diamond-like carbons, and the microstructure coincided with that of an amorphous C-fcc Ni composite. Inversely, in high energy growth conditons, the films were composed of dispersed Ni3C small crystallites in an amorphous Ni-C mixture. Such a microstructure was characterized by low mechanical propertiesI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
