fig21
![Development of robust surfaces for harsh service environments from the perspective of phase formation and transformation](https://image.oaes.cc/6fdf97ea-ef8f-4210-ac0b-4962c57383cc/4323.fig.21.jpg)
Figure 21. Development of the hot-corrosion resistant Ni-Si-Al-Y quaternary system: composition-structure-property relationships based on the calculated phase diagrams at 750 and 1140 °C. The proposed composition range may possess a combination of high strength, toughness, as well as excellent high-temperature oxidation and corrosion resistance. Figure reproduced from Ref.[38] with permission from Elsevier.