Rhenium metals and alloys
Rhenium is a rare refractory metal, with a high melting point, high strength and good plasticity, and excellent mechanical stability, its melting point is second only to tungsten, up to 3180 ℃, rhenium has no brittle critical transition temperature, in high temperatures and rapid cold and heat conditions are very good creep resistance, suitable for ultra-high temperature and strong thermal shock working environment, its room temperature tensile strength of more than 1172 MPa, 2200 ℃ can still be maintained at 48 MPa, far more than other metals. Rhenium has very good heat shock resistance at high temperatures, at 2200 ℃, the rhenium manufactured engine nozzle can withstand 100 000 thermal fatigue cycles without failure. In addition, rhenium also has very good resistance to wear and corrosion, its resistance to wear is second only to osmium metal, for most of the gas except oxygen can maintain relatively good chemical inertness, will not be hot hydrogen corrosion, the penetration rate of hydrogen is also very low. It is also used in platinum-rhenium catalysts for performing certain reactions to a type of hydrocarbon know as an olefin. Because of its series of excellent characteristics, rhenium and its alloys are widely used in the petrochemical, electronic industry, and aerospace industries, becoming one of the most important new materials in the modern high-tech field.