fig5
![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.5.jpg)
Figure 5. Equilibrium and metastable phase diagrams for V-Al-N system: (A) equilibrium VN-AlN pseudobinary phase diagram; (B) Gibbs free energies of fcc and hexagonal close packed (hcp) V1-xAlxN solid-solution phases; (C) metastable VN-AlN phase formation diagrams calculated using experimental data at 550 °C and a power density of 2.3 W·cm-2 as inputs, and validated using the experimental data at power densities of (D) 2.3, (E) 4.6, (F) 6.8, (G) 1.2 and (H) 0.2 W·cm-2. Figure reproduced from Ref.[36] with permission from Elsevier.