Fig. 1. Surface micromorphology of Cr-coated Zr-4 alloy sample

Fig. 2. Cross-sectional morphologies of Cr-coated Zr-4 alloy samples and corresponding EDS results

Fig. 3. EBSD maps of as-deposited Cr-coated Zr-4 alloy (a) OIM map, (b) IPF, (c) schematic illustration of direction, (d) PF

Fig. 4. Macro-morphology of Cr-coated Zr-4 alloy before and after high temperature oxidation

Fig. 5. Surface morphology after high temperature oxidation (a1, a2) 800 ℃-4 h, (b1, b2) 900 ℃-4 h, (c1, c2) 1 000 ℃-4 h, (d1, d2) 1 100 ℃-4 h, (e1, e2) 1 200 ℃-4 h

Fig. 6. Cross-sectional morphology and EDS results after high temperature oxidation (a1, a2, a3) 800 ℃-4 h, (b1, b2, b3) 900 ℃-4 h, (c1, c2, c3) 1 000 ℃-4 h, (d1, d2, d3) 1 100 ℃-4 h, (e1, e2, e3) 1 200 ℃-4 h

Fig. 7. XRD patterns of Cr-coated Zr-4 alloy before and after high temperature oxidation

Fig. 8. Thickness of Cr-Zr diffusion layer after high temperature oxidation (a), oxidation weight gain of Cr-coated Zr-4 alloy and uncoated Zr-4 alloy (b)