In-situ synthesis of (Nb,Mo) C composite carbides via Mo₂C decomposition: A novel strategy for synergistic wear and corrosion resistance in laser-cladded Ni-based coatings

Lijun Wang

doi:10.1016/j.surfcoat.2026.133690

In-situ synthesis of (Nb,Mo) C composite carbides via Mo₂C decomposition: A novel strategy for synergistic wear and corrosion resistance in laser-cladded Ni-based coatings

2026-06-11

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L

Lijun Wang

W

Wenqing Shi *

D

Dongdong Chen

Y

Yuan Teng

Z

Zuozhu Yin *

M

Mingshan Xue *

DOI：10.1016/j.surfcoat.2026.133690

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• A novel (Nb,Mo)C composite carbide was in-situ synthesized in Ni-based coatings using Mo₂C as a non-graphite carbon source. • Coating microstructure was strategically tailored from columnar to equiaxed grains with increasing (Nb+Mo₂C) content. • The 20% (Nb+Mo₂C) coating achieved a combination of high hardness, excellent wear resistance, and superior corrosion resistance. • Corrosion resistance stems from a dense, multi-oxide (Cr₂O₃/Nb₂O₅/MoO₃) passive film with minimal defect density.

In-situ synthesis of (Nb,Mo) C composite carbides via Mo₂C decomposition: A novel strategy for synergistic wear and corrosion resistance in laser-cladded Ni-based coatings

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