Cobalt-chromium-nickel medium entropy alloy

What is medium entropy alloy?

Medium entropy alloy is a new type of alloy material,  usually composed of three or four main elements, and the atomic percent. The atomic percentage of each element varies around the equal atomic ratio or near the equal atomic ratio, and the mixing entropy is between the high entropy alloy and the conventional alloy . Cobalt-chrome-nickel medium entropy alloy is a typical representative of medium entropy alloy, mainly composed of cobalt (Co), chromium (Cr), nickel (Ni) three elements in accordance with the near-equal atomic ratio, usually the atomic percentage of each element is close to 33.33%.  Common medium entropy alloy systems include CoCrNi medium entropy alloy, FeCrNi medium entropy alloy, NiCoFe medium entropy alloy, VCoNi medium entropy alloy, TiZrNb medium entropy alloy material and so on. In addition, mesentropic alloys can also contain other elements, such as titanium (Ti), vanadium (V), zirconium (Zr), etc., depending on the desired properties and application scenarios. 

CoCrNi medium entropy alloy With the characteristics of high strength and high toughness, cobalt-chromium-nickel mesentropic alloy realizes the synergy of high strength and good toughness through a variety of strengthening mechanisms, such as solid solution strengthening and dislocation strengthening. It can withstand great stress without brittle fracture, overcome the difficult problem of balance between strength and toughness in traditional alloys, and has important application value in aerospace, mechanical engineering and other fields.

CoCrNi sputtering target with  anti-fatigue properties and  excellent corrosion resistance. with high temperature properties: At high temperatures, cobalt chromium-nickel alloy exhibits better mechanical properties and creep resistance. Its special atomic bonding mode and microstructure make it resistant to slow plastic deformation at high temperatures.

CoCrNi metal alloy target preparation method is smelting method and powder metallurgic method.

1.Smelting method: The high-purity cobalt, chromium, nickel metal raw materials are put into the furnace in equal proportion, heated to melt above the melting point, and then through full stirring, refining and other processes, to obtain a uniform composition of cobalt chromium-nickel medium entropy alloy molten liquid, and finally cast to obtain alloy ingot.

2.Powder metallurgy method: the cobalt, chromium, nickel metal powder is mixed evenly according to the predetermined proportion, and then through pressing, sintering and other processes, the metallurgical combination between the powder particles is formed to prepare the cobalt chromium-nickel medium entropy alloy material. This method can produce alloy parts with complex shapes and precise dimensions.