Cr-Al coatings on low carbon steel prepared by a mechanical alloying technique

6th Asian Physics Symposium

Hia, A.I.J.^1 ; Sudiro, T.^2 ; Aryanto, D.^2 ; Sebayang, K.^1

Postgraduate Program, Faculty of Mathematic and Natural Science, University of Sumatra Utara, Sumatera Utara

20155, Indonesia^1

Research Center for Physics, Indonesian Institute of Sciences, Kawasan Puspiptek Serpong

15310, Indonesia^2

关键词: After-heat treatment;    Al coatings;    Al powder;    Ball-to-powder ratios;    Coated sample;    Coating compositions;    Mechanical alloyed;    SEM-EDX;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/739/1/012131/pdf
DOI  :  10.1088/1742-6596/739/1/012131

来源: IOP

【 摘 要 】

Four different compositions of Cr and Al coatings as Cr10o, Cr87.5Al12.5, Cr5oAl5o, and Al100 have been prepared on the surface of low carbon steel by a mechanical alloying technique. The composition of each powder was milled for 2 hour in a stainless steel crucible with a ball to powder ratio of 10:1. Hereafter, the Cr-Al powder and substrate were mechanical alloyed in air for 1 hour. Heat treatment of coated sample were carried out at 800°C in a vacuum furnace. In order to characterize the phase composition and microstructure of the coating before and after heat treatment, XRD and SEM-EDX were used. The results show that Cr, Cr-Al or Al coatings were formed on the surface of low carbon steel. After heat treatment, new phases and interdiffusion zone were formed in the coating and at the coating/steel interface, depending on the coating composition.