ME 4133/6133 Mechanical Metallurgy



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One of the most widely used metals on the periodic table is Platinum (Pt). The name is derived from the Spanish Platina, meaning “silver.” This malleable, ductile material is widely used in applications due to its unique chemical properties. A couple of these unique properties include a high melting point and good resistance to corrosion or chemical attack. Platinum materials have alloys that are indispensable in the chemical laboratory for electrodes. This allows for material applications in crucibles and dishes to withstand elevated temperatures. Platinum is used primarily in catalytic converters in vehicles converting emissions from the vehicle’s engine into carbon dioxide and water vapor. White gold is a gold-platinum alloy that is used in the making of jewelry and dentistry. Other applications include computer hard disks, thermocouples, LCDs, turbine blades, spark plugs, dental fillings, etc. In the research, Pt950/Ir 50 will be the specific alloy discussed throughout. Platinum-Iridium (Pt950/Ir 50) is known as the chosen alloy in the manufacturing of jewelry for its soft and fragile gem setting. We chose Platinum 950/Iridium 50 as our metal. It is a platinum alloy used in jewelry applications that is composed of 95% Platinum and 5% Iridium. Iridium is added to elements to increase several material properties such as hardness or chemical/heat resistance. This alloy is usually manufactured or cold rolled to produce jewelry. This motivated our group to dive deeper into the understanding of microstructures within this alloy.


Materials Science and Engineering | Mechanical Engineering | Metallurgy


James Worth Bagley College of Engineering


Department of Mechanical Engineering

Platinum-Iridium Alloys in Jewelry