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Microstructure and properties of TiB2–Ni coatings with different binder phase contents deposited by HVOF spray process

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Abstract

TiB2–Ni coatings with different binder phase contents were sprayed on Q235 substrate by a high-velocity oxygen-fuel (HVOF) method using ball-milled powders. The microstructure, phase compositions, as well as thermal shock behavior, abrasive wear, and corrosion resistance to molten Al-12.07 wt%Si alloy performances of as-sprayed coatings were investigated. The results show that the three TiB2–Ni coatings structure is dense with low porosity, and the main phase compositions of the coatings are TiB2 and Ni similar to those of original powder. The coatings that have superior performance of thermal shock resistance have good bond to the substrate with no change in thickness and microstructure of coatings. Meanwhile, the coatings also have good durability in the molten Al-12.07 wt%Si after 60-h immersion test. And the mass loss of Q235 steel is five times as much as that of TiB2–50Ni coatings after abrasive wear test.

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Acknowledgments

This study was financially supported by the National Natural Science Foundation of China (No. 51001056), the Natural Science Foundation of Jiangxi Province (No. 20132BAB216014), and the Science and Technology Project of Jiangxi Educational Bureau (Nos. GJJ12610, GJJ13721, and GJJ12622).

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Correspondence to Xiao Chen.

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Chen, X., Wang, HT., Ji, GC. et al. Microstructure and properties of TiB2–Ni coatings with different binder phase contents deposited by HVOF spray process. Rare Met. 41, 1385–1393 (2022). https://doi.org/10.1007/s12598-015-0528-z

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  • DOI: https://doi.org/10.1007/s12598-015-0528-z

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