title: Studies on the castability of Co-Cr alloy for cast plates. Part 1: The effects of sprue attachment direction to wax plates and the investment direction of refractory models.
abstract: Co-Cr alloy is used more frequently than Ni-Cr alloy as a non-precious alloy for cast plates in Japan. However, since the melting point of Co-Cr alloy is very high, about 1300 degrees C, and since it oxidizes easily, a vacuum-pressure casting machine capable of melting this alloy in a reduced atmosphere has recently been developed. Using this vacuum-pressure casting machine, the authors studied the effects on the Co-Cr alloy of the attachment direction of sprues and the investment direction of refractory models. The results clarified that in the vacuum-pressure casting method, sprue attachment direction and the investment direction of refractory models have a significant effect (p less than 0.01) on the castability of Co-Cr alloy.
authors.forename: Y
authors.initials: Y
authors.lastname: Satoh
authors.forename: H
authors.initials: H
authors.lastname: Toyoma
authors.forename: K
authors.initials: K
authors.lastname: Ohki
authors.forename: K
authors.initials: K
authors.lastname: Kimura
authors.forename: Y
authors.initials: Y
authors.lastname: Shina
authors.forename: K
authors.initials: K
authors.lastname: Maeda
mesh_terms: D002858:Chromium Alloys; D003735:Dental Casting Technique / Q000295:instrumentation*; D003765:Models, Dental; D014025:Titanium; D014618:Vacuum
chemical_list: D002858:Chromium Alloys; D014025:Titanium