In-situ (Ti,Nb)C reinforced Ni-based coatings: New insights into microstructure evolution, enhanced phase configuration behavior and tribological properties

作者: Mingyang Zhang , Min Li , Jing Chi , Shufeng Wang , Min Fang

DOI: 10.1016/J.CERAMINT.2020.02.223

关键词: DuctilityMaterials scienceTribologyCarbideCoatingToughnessHardfacingMetal matrix compositeComposite materialMicrostructure

摘要: Abstract Multiple carbide reinforced metal matrix composite coating has been a promising material with superior abrasion resistance properties. Currently the improvement of wear mainly depends on introduction reinforcing phase at expense inherent excellent ductility matrix. Here, new window to enhancing by adjusting configuration space without sacrificing toughness is introduced. (Ti,Nb)C/Ni-based hardfacing alloy prepared plasma transferred arc technology investigated in this paper. Results showed that change Ti/Nb atoms ratio, Cr-rich an obvious refinement behavior, which changes from thick slat shape short bar smaller length-diameter ratio. It observed microcracks are generated coarse under action applied stress and expand rapidly. Nevertheless, evolution shape, only tiny micro-cracks exist carbide. When Ti:Nb = 7:3, was attributed reasonable spatial distribution enhanced phase. Ti:Nb = 3:7 0:10, microhardness brought increase precipitation content. By designing internal correlation between behavior dry sliding test, positive materials broken, may provide design for improving while maintaining good

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