title: [Surface roughness of high copper alloys as a function of heating above casting temperature].
abstract: Being the surface roughness a fundamental property in the fit of the castings, it was determined the roughness of 5 high-copper casting alloys, according to the heating over their melting temperature. That way, the specimens made with smooth plastic in the shape of a rectangular plate, 2 mm x 7 mm x 11 mm were invested into a cristobalite investment. After heating and elimination on the plastic, the molds were filled by 3 g of molten alloy, casted in a electrical casting machine at the casting temperature at 25 degrees C and 50 degrees C overheating. The surface roughness was measured in a roughness analyser, Talysurf. As a result, it was verified that there is a variation of surface roughness among the alloys tested, and the heating of the alloys until 50 degrees C over the melting temperature does not interfere in the roughness.
authors.affiliation: Faculdade de Odontologia do Campus de Aracatuba, UNESP.
authors.forename: P E
authors.initials: PE
authors.lastname: Bombonatti
authors.forename: L E
authors.initials: LE
authors.lastname: de Barros
authors.forename: R M
authors.initials: RM
authors.lastname: Scaranelo
authors.forename: A J
authors.initials: AJ
authors.lastname: Pellizzer
mesh_terms: D003300:Copper; D003722:Dental Alloys; D003735:Dental Casting Technique; D013499:Surface Properties; D013696:Temperature
chemical_list: D003722:Dental Alloys; D003300:Copper
vernacular_title: Rugosidade superficial de ligas com alto conteúdo de cobre, em função do aquecimento acima da temperatura de fusão.