title: Mesh monitor casting of Ni-Cr alloys: element effects.
abstract: A mesh monitor has previously been used for quantitative evaluation of the casting of dental alloys. A castability value, Cv was defined. For curve-fitting, a transformed castability value, Cv,t, was used. A series of alloys was selected so that effects of major elements on Cv, t and, hence, on Cv could be determined. Compositions were chosen so that correlated effects would be avoided. Assuming a linear dependence on the concentrations of individual elements, one may use the following equation to describe Cv,t: (Formula: see text) where each term employs an elemental concentration in weight percent, (Ei), and a coefficient, Ki, for the ith term. Because Ei's are constant for each alloy, Ki = fi (TA, TM) = gi (TC, TM). The temperature-dependent coefficients, Ki, were determined for seven elements and for the (Ni/(Cr) ratio. It was also found that Si and Be produce a synergistic effect. The results help our understanding of the casting behavior of Ni-Cr dental alloys; this approach may be useful in the design of dental alloys.
authors.forename: O
authors.initials: O
authors.lastname: Okuno
authors.forename: J A
authors.initials: JA
authors.lastname: Tesk
authors.forename: R
authors.initials: R
authors.lastname: Penn
mesh_terms: D002858:Chromium Alloys; D003735:Dental Casting Technique / Q000295:instrumentation; D006358:Hot Temperature
chemical_list: D002858:Chromium Alloys