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Refractory metals have high melting points, with tungsten and rhenium the highest of all elements, and the other's melting points only exceeded by osmium and iridium, and the sublimation of carbon. These high melting points define most of their applications. All the metals are body-centered cubic except rhenium which is hexagonal close-packed.
Individually, the tantalum and hafnium carbides have the highest melting points among the binary compounds, 4,041 K (3,768 °C; 6,814 °F) and 4,232 K (3,959 °C; 7,158 °F), respectively, [1] and their "alloy" with a composition Ta 4 HfC 5 has a melting point of 4,178 K (3,905 °C; 7,061 °F).
A superalloy, or high-performance alloy, is an alloy with the ability to operate at a high fraction of its melting point. [1] Key characteristics of a superalloy include mechanical strength , thermal creep deformation resistance, surface stability, and corrosion and oxidation resistance.
The tantalum–tungsten alloys are characterized by their high melting point and the tension resistance. The properties of the final alloy are a combination of properties from the two elements: tungsten, the element with the highest melting point in the periodic table, and tantalum which has high corrosion resistance. [1] [2]
Hafnium carbide (Hf C) is a chemical compound of hafnium and carbon.Previously the material was estimated to have a melting point of about 3,900 °C. [2] More recent tests have been able to conclusively prove that the substance has an even higher melting point of 3,958 °C exceeding those of tantalum carbide and tantalum hafnium carbide which were both previously estimated to be higher. [3]
5) possesses the highest melting point of any currently known compound, 4,263 K (3,990 °C; 7,214 °F). [34] Recent supercomputer simulations suggest a hafnium alloy with a melting point of 4,400 K (4,127 °C; 7,460 °F).
The Gmelin rare earths handbook lists 1522 °C and 1550 °C as two melting points given in the literature, the most recent reference [Handbook on the chemistry and physics of rare earths, vol.12 (1989)] is given with 1529 °C.
KappTec General purpose solder that will join all solderable metals except aluminium. High temperature, high strength solder. It is used in applications where alloys melting higher than soft solders are required, but the cost and strength of silver-brazing alloys is not necessary. [31] Cd 78 Zn 17 Ag 5: 249: 316 [32] Cd: No