Microstructures of Pd-containing dispersants for admixed dental amalgams J.H. Chern Linu,s* E.H. GreeneP
3NationalCheng Kung University Department of MaterialsEngineering 70101, Tainan, Taiwan Republic of China and NorthwesternUniversity Dental School Department of Basic Science Division of BiologicalMaterials 311 E. ChicagoAvenue Chicago, IL 60611 ReceivedJuly 24, 1990 AcceptedJune 7, 1991 *To whom correspondenceand reprint requestsshould be addressed This investigationwas supportedin part by: 'NIH-NIDR research grant DE 06994from the National Instituteof Dental Research, Bethesda, MD 20892 and 2NSCgrant NSC74-O606-BOIO-29from the National Science Council,Taiwan, ROC. Dent Mater 7:254-257,October, 1991
Abstract--Blended Pd-containing dispersantswere developed by the utilization of a Ag-Cu eutectic int~ which Pd was substitutedfor Ag or Cu in concentrationsof up to 20 wt%. Compositionswere melted either in argon-filledsealed vycor tubes or in a graphite-linedcarbon crucibleof an inductionfurnace with an argon blanket. ingots of approximately1.5 cm in diameter were sectioned to 0.2 cm in thickness and polishedthrough standard metallographic polishingprocedures. The possible compoundswere identifiedby XRD. The microstructuresof the alloys were examined by SEM/EDS. XRD analysisof the alloys revealed the preferentialdissolutionof Pd in Cu when the Pd concentrationwas _
3NationalCheng Kung University Department of MaterialsEngineering 70101, Tainan, Taiwan Republic of China and NorthwesternUniversity Dental School Department of Basic Science Division of BiologicalMaterials 311 E. ChicagoAvenue Chicago, IL 60611 ReceivedJuly 24, 1990 AcceptedJune 7, 1991 *To whom correspondenceand reprint requestsshould be addressed This investigationwas supportedin part by: 'NIH-NIDR research grant DE 06994from the National Instituteof Dental Research, Bethesda, MD 20892 and 2NSCgrant NSC74-O606-BOIO-29from the National Science Council,Taiwan, ROC. Dent Mater 7:254-257,October, 1991
Abstract--Blended Pd-containing dispersantswere developed by the utilization of a Ag-Cu eutectic int~ which Pd was substitutedfor Ag or Cu in concentrationsof up to 20 wt%. Compositionswere melted either in argon-filledsealed vycor tubes or in a graphite-linedcarbon crucibleof an inductionfurnace with an argon blanket. ingots of approximately1.5 cm in diameter were sectioned to 0.2 cm in thickness and polishedthrough standard metallographic polishingprocedures. The possible compoundswere identifiedby XRD. The microstructuresof the alloys were examined by SEM/EDS. XRD analysisof the alloys revealed the preferentialdissolutionof Pd in Cu when the Pd concentrationwas _
