Structure and phase composition transformation in Cr20Ni80 + Ni2Al3 + CrAl7 layered coating under thermal effect

International Workshop "Advanced Technologies in Material Science, Mechanical and Automation Engineering – MIP: Engineering – 2019"

材料科学;机械制造;原子能学

Shmorgun, V.G.^1 ; Bogdanov, A.I.^1 ; Taube, A.O.^1 ; Shcherbin, D.V.^1

Volgograd State Technical University, Lenin Avenue 28, Volgograd

400005, Russia^1

关键词: Chromium contents;    Coating thickness;    Copper substrates;    Cr content;    Layered coatings;    Secondary reaction zones;    Temperature range;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/537/2/022065/pdf
DOI  :  10.1088/1757-899X/537/2/022065

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The thermal stability of the Cr20Ni80 / (Ni2A13 + CrAl7) layered coating on Ml copper substrate was studied. It is found, that the sequence of phase transformations in layered coating during the heat treatment in temperature range of 700-1000 °C is Ni2Al3 + CrAl7 → Ni2Al3(Cr) + NiAl(Cr) → NiAl(Cr). It is shown, that an increase in temperature and duration of thermal effect leads to the alignment of Al, Ni and Cr content over the coating thickness due to the diffusion redistribution of elements and to the formation of a secondary reaction zone with a high chromium content.