The Structure-Phase Compositions of Powder Ni _ based Coatings after Modification by DC Plasma Jet Irradiation

Electron Microscopy and Analysis Group Conference 2015

Alontseva, D.^1 ; Ghassemieh, E.^2

East-Kazakhstan State Technical University, 69 Protozanov St, Ust-Kamenogorsk

070004, Kazakhstan^1

School of Mechanical and Aerospace Engineering, Queen's University of Belfast, Stranmillis road, Belfast

BT9 5AH, United Kingdom^2

关键词: Coating elements;    Coating treatment;    Direct current plasmas;    Fine-grained structure;    Intermetallic phasis;    Ni-based coatings;    Strengthening phasis;    Structural-phase state;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/644/1/012009/pdf
DOI  :  10.1088/1742-6596/644/1/012009

来源: IOP

【 摘 要 】

This paper presents the results of investigation of the structure-phase compositions of Ni-based coatings deposited by plasma jet on steel substrates after modification by direct current (DC) plasma jet irradiation. Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM) and X-ray Diffraction (XRD) are used in the current study. The phase structures and morphology of precipitation of strengthening phases from solid solution are defined. The irradiation of the coatings leads to the evolution of the structural-phase state of coatings: an increase in the volume fraction of hardening intermetallic phases, the formation of sufficiently homogeneous fine-grained structure in the irradiated coatings. There is a mutual penetration of the substrate main element Fe into the coating and base coating elements Ni into the substrate as a result of the coating treatment by a pulse DC plasma jet.