Microstructure and Corrosion Behavior of Laser-Cladding CeO₂-Doped Ni-Based Composite Coatings on TC4

Figure 3

The SEM photographs of the laser-cladding coatings for different CeO₂ contents: (a–c) 0%, (d–f) 1%, (g–i) 2%, (j–l) 3%, (m–o) 4%, (p–r) 5%, and (s–u) 6%. (a, d, g, j, m, p, and s) The surface portion of coatings. (b, e, h, k, n, q, and t) The middle portion of coatings. (c, f, i, l, o, r, and u) The surface portion of coatings.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)

(j)

(k)

(l)

(m)

(n)

(o)

(p)

(q)

(r)

(s)

(t)

(u)