scholarly journals Microstructure and Wear Resistance of Ni-Al2O3 Nano-composite Coating

2021 ◽  
Vol 1965 (1) ◽  
pp. 012113
Author(s):  
Guang Qu ◽  
Dongsheng Wang ◽  
Qunyou Wang ◽  
Mengzhang Hua
2021 ◽  
Vol 2114 (1) ◽  
pp. 012077
Author(s):  
N Salam ◽  
M A. Jaleel

Abstract In this paper, we succeeded in obtaining a Ni/SiC nano composite coating using conventional electro deposition by adding different amount of SiC nanoparticles to a nickel-watt bath to be co-deposited. The effect of electro deposition conditions was studied by changing the amount of SiC nanoparticles in the nano composite, and the deposition current density which affects on the participation of SiC nanoparticles in the coating. The morphology and mechanical properties of the electrodeposited nano-composite were studied. The wear behavior of the nano-composite coatings was evaluated on a ball-on-disk test. It was found that the increased micro hardness and wear resistance of the nano-composite coatings increased with increasing content of the SiC nano-particulate in bath.


Author(s):  
Chandrasekhara Sastry Chebiyyam ◽  
Pradeep N ◽  
Shaik AM ◽  
Hafeezur Rahman A ◽  
Sandeep Patil

Abstract Nano composite coatings on HSLA ASTM A860 alloy, adds to the barrier efficacy by increase in the microhardness, wear and corrosion resistance of the substrate material. Additionally, reduction of delamination of the nano composite coating sample is ascertained. Ball milling is availed to curtail the coating samples (Al2O3/ZrO2) to nano size, for forming a electrodeposited product on the substrate layer. The curtailment in grain size was ascertained to be 17.62% in Ni-Al2O3/ZrO2 nano composite coating. During the deposition process, due to the presence of Al2O3/ZrO2 nano particles an increase in cathode efficiency is ascertained. An XRD analysis of the nano composite coating indicates a curtailment in grain size along with increase in the nucleation sites causing a surge in the growth of nano coating layer. In correlation to uncoated HSLA ASTM A36 alloy sample, a surge in compressive residual stress by 47.14%, reduction of waviness by 32.14% (AFM analysis), upsurge in microhardness by 67.77% is ascertained in Ni-Al2O3/ZrO2 nano composite coating. Furthermore, in nano coated Ni-Al2O3/ZrO2 composite a reduction is observed pertaining to weight loss and friction coefficients by 27.44% and 13% in correlation to plain uncoated alloy respectively. A morphology analysis after nano coating indicates, Ni-Al2O3/ZrO2 particles occupy the areas of micro holes, reducing the wide gaps and crevice points inside the matrix of the substrate, enacting as a physical barrier to upsurge the corrosion resistance by 67.72% in correlation to HSLA ASTM A860 base alloy.


2010 ◽  
Vol 256 (13) ◽  
pp. 4176-4184 ◽  
Author(s):  
Bin Yin ◽  
Guang Liu ◽  
Huidi Zhou ◽  
Jianmin Chen ◽  
Fengyuan Yan

2006 ◽  
Vol 22 (05) ◽  
pp. 590-595
Author(s):  
WANG Zhou-Cheng ◽  
◽  
◽  
HUANG Long-Men ◽  
TANG Yi ◽  
...  

2019 ◽  
Vol 492 ◽  
pp. 540-549 ◽  
Author(s):  
Zhaoxi Chen ◽  
Li Qiao ◽  
Julien Hillairet ◽  
Yuntao Song ◽  
Viviane Turq ◽  
...  

2020 ◽  
Vol 24 ◽  
pp. 975-982 ◽  
Author(s):  
C.R. Raghavendra ◽  
S. Basavarajappa ◽  
Irappa Sogalad ◽  
Siddaligayya Mathad

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