The dominant force in high-temperature alloys - nickel based alloys

Nickel based alloys are currently the most widely used high-temperature alloys and have the highest high-temperature strength. In the field of high-temperature alloys, nickel based alloys have a very important and special position. Compared to iron-based alloys and cobalt based alloys, nickel based alloys have stronger high-temperature resistance, and are also more powerful in terms of oxidation resistance and corrosion resistance than iron-based alloys and cobalt based alloys.

The reason why nickel based alloys can become the most widely used and powerful alloys in the field of high-temperature alloys is mainly due to the following three reasons:

1. Nickel based alloys have the ability to maintain strong structural stability and dissolve a large number of alloying elements.

2. Nickel based alloys can form a coherent ordered A3B type intermetallic compound [Ni3 (Al, Ti)] phase as a strengthening phase, effectively strengthening the alloy and achieving higher high-temperature strength than iron-based high-temperature alloys and cobalt based high-temperature alloys.

3. Nickel based alloys contain chromium elements, which gives them stronger oxidation and corrosion resistance compared to iron-based alloys, and superior performance in resisting gas corrosion.