Influence of annealing temperature on the structure and properties of the nanograined NiAl intermetallic coatings produced by using mechanical alloying

被引：24
作者：
Mohammadnezhad, M. [1 ]
Shamanian, M. [1 ]
Enayati, M. H. [1 ]
Salehi, M. [1 ]
机构：
[1] Isfahan Univ Technol, Dept Mat Engn, Esfahan 8415683111, Iran
来源：
SURFACE & COATINGS TECHNOLOGY | 2013年 / 217卷
关键词：
Coating; Intermetallics; Mechanical alloying; Nanostructured materials; Annealing treatment; Wear; CARBON-STEEL; FABRICATION; ENERGY; LAYER;
D O I：
10.1016/j.surfcoat.2012.11.073
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Nanostructured NiAl intermetallic coatings were produced on carbon steel by using mechanical alloying in ambient temperature and pressure. Ni and Al powders were mixed with the composition of Ni-50 at.% Al. Coatings were examined using X-ray diffraction and scanning electron microscopy (SEM). Transmission electron microscopy (TEM) was also used to observe coating particles. Samples prepared after 480 min ball milling were subjected to annealing treatment at temperatures range of 400 degrees C to 600 degrees C Continued ball milling reduced the coarse grains of the coating to the nanoscale. The size of nanoclystalline grains in the Ni-Al coating ranged between 17 nm and 96 nm. The nanocrystalline grains had a tendency to grow with increasing annealing temperature. After annealing at 400 C, a solid state reaction between Al and Ni leads to the formation of new phases. With increasing annealing temperature to 600 degrees C only NiAl peaks were observed on XRD pattern. After annealing the hardness of the coating initially decreased and then increased. Annealing treatment also improved wear resistance of the coating. (c) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：64 / 69
页数：6
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