Preliminary Microstructural and Microscratch Results of Ni-Cr-Fe and Cr3C2-NiCr Coatings on Magnesium Substrate

International Conference on Innovative Research - ICIR Euroinvent 2017

Istrate, B.^1 ; Munteanu, C.^1 ; Lupescu, S.^1 ; Benchea, M.^1 ; Vizureanu, P.^2

Gheorghe Asachi Technical University of Iasi, Faculty of Mechanical Engineering, 43 D. Mangeron Street, Iasi

700050, Romania^1

Gheorghe Asachi Technical University of Iasi, Faculty of Material Science and Engineering, 61-63 D. Mangeron Street, Iasi

700050, Romania^2

关键词: Coefficient of frictions;    Large-scale applications;    Magnesium substrates;    Mechanical characteristics;    Micro-structural;    Microstructural analysis;    Microstructural aspects;    Scanning electronic microscopy;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/209/1/012024/pdf
DOI  :  10.1088/1757-899X/209/1/012024

来源: IOP

【 摘 要 】

Thermal coatings have a large scale application in aerospace and automotive field, as barriers improving wear mechanical characteristics and corrosion resistance. In present research, there have been used two types of coatings, Ni-Cr-Fe, respectively Cr3C2-NiCr which were deposited on magnesium based alloys (pure magnesium and Mg-30Y master alloy). There have been investigated the microstructural aspects through scanning electronic microscopy and XRD analysis and also a series of mechanical characteristics through microscratch and indentation determinations. The results revealed the formation of some adherent layers resistant to the penetration of the metallic indenter, the coatings did not suffer major damages. Microstructural analysis highlighted the formation of Cr3C2, Cr7C3, Cr3Ni2, Cr7Ni3, FeNi3, Cr-Ni phases. Also, the apparent coefficient of friction for Ni-Cr-Fe coatings presents superior values than Cr3C2-NiCr coatings.