Study of a Pd-Ag-Sb system alloy for metal-ceramics.
The present study is aimed at developing a palladium silver based alloy containing antimony and other elements for metal-ceramics. Composition 54.2Pd-36.2Ag-4.7Sb-2.9In-1.0Sn-1.0Ga++ + (alloy No. 10) was finally selected as the best for practical applications. Liquidus and solidus temperatures of this alloy were 1,250 degrees C and 1,087 degrees C. Under fired conditions, the Vickers hardness number, tensile strength, and elongation were 270, 647 MPa, and 3.4%, respectively. In the temperature range from 20 degrees C to 600 degrees C, the thermal expansion rate was 0.87%, and the thermal expansion coefficient was 15.0 X 10(-6)/degrees C. The mechanical and manipulation properties of this alloy were satisfactory for clinical applications.
Limkool
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Department of Restorative Dentistry, Faculty of Dentistry, Chiang Mai University, Thailand.
Sumii
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D000965:Antimony; D003722:Dental Alloys / Q000737:chemistry*; D001840:Dental Bonding; D005708:Gallium; D006244:Hardness; D007204:Indium; D008422:Materials Testing; D016876:Metal Ceramic Alloys / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D010165:Palladium; D012834:Silver; D013718:Tensile Strength; D013816:Thermodynamics; D014001:Tin
D003722:Dental Alloys; D016876:Metal Ceramic Alloys; D007204:Indium; D012834:Silver; D010165:Palladium; D014001:Tin; D000965:Antimony; D005708:Gallium