Structure of SnO2-Ag coating formed on copper by electroexplosion

Open School-Conference of NIS Countries Ultrafine Grained and Nanostructured Materials

Romanov, D.A.^1 ; Moskovskii, S.V.^1 ; Sosnin, K.V.^1 ; Gromov, V.E.^1 ; Filyakov, A.D.^1

Prof. V Finkel Depart of Natural Scien., Siberian State Industrial University, 42 Kirov st., Novokuznetsk

654007, Russia^1

关键词: Affected layers;    Coating surface;    Elemental compositions;    Fragmented structure;    Morphological structures;    Nano-crystalline structures;    Sample surface;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/447/1/012077/pdf
DOI  :  10.1088/1757-899X/447/1/012077

来源: IOP

【 摘 要 】

Studies of the phase and elemental composition of the surface layer of the copper electric contact of the KPV-604 contactor subjected to electro-explosive spraying of the composite SnO2-Ag-coating were carried out by means of transmission electron microscopy. The scale of elemental structure of the coating surface varies within a very wide interval after electro-explosive spraying - from hundreds of micrometers to tens of hundreds of nanometers. According to the morphological structure, two layers can be distinguished in the coating volume: the coating itself and the heat affected layer smoothly transferring into the bulk of the sample. A nanocrystalline structure was detected. The main phases of the coating are SnO2, Ag3Sn, Cu10Sn3, Cu3Sn, Cu6Sn5, Ag4Sn and CuO. The volume of copper adjacent to the coating has a fragmented structure indicating a high level of deformation of the sample surface layer under the electro-explosive formation of the coating.