Comportamiento tribológico de cerámicas refractarias

espanolHan sido estudiadas las propiedades tribologicas de coeficiente de friccion y desgaste para materiales ceramicos refractarios (carburo de silicio y carburo de silicio nitrurado), frente a una bola de acero sometida a distintas velocidades de desplazamiento. Los ensayos se realizaron a temperatura inicial de 25 y sin lubricantes. La fuerza de friccion fue controlada continuamente y los mecanismos de desgaste se estudiaron mediante microscopia optica. Se ha comprobado que peliculas metalicas se depositan sobre la superficie ceramica y actuan como proteccion contra el desgaste dejando parte de la ceramica original sin danar. EnglishA study on tribological (wear and friccion coefficients) in refractory materials (silicon carbide and nitride silicon carbide) is presented. Tests were done using a steel ball with several sliding rates. The initial temperature was 25 C and lubricants were not used. Friction was monitored continuosly and wear mechanisms were determined using an optical microscope. It was shown that metallic films transfer onto ceramic surface and these this acted as a protection against wear, leaving most of the original ceramic surfaces undamaged.