Effect of TiC Particles Concentration on Microstructure and Properties of Ni-TiC Composite Coatings

Ma, Min; Sun, Wan‐chang; Zhang, Ya-gang; Liu, Xiaojia; Dong, Ya-ru; Zi, Jin-Yu; Xiao, Yan

doi:10.1590/1980-5373-mr-2019-0530

Cited by 9 publications

(3 citation statements)

References 21 publications

(19 reference statements)

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“…The XRD diffractograms indicated no shift in the position of Ni planes. However, the preferred orientation changed from (200) to (111) due to the comparatively lower surface energy of (111) planes [27]. The duty cycle was further increased for sample 8 and 0.5 g l −1 B 4 C was added.…”

Section: Xrd Analysismentioning

confidence: 99%

Investigations on the properties of composite coatings electro co-deposited on AZ80 Mg alloy using triangular waveform pulse current

Pushpanathan¹,

Natarajan²,

Devaneyan³

2021

Surf. Topogr.: Metrol. Prop.

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In this research, boron carbide (B4C) and titanium carbide (TiC) nanoparticles were deposited along with Nickel on AZ80 magnesium alloy substrates. Triangular waveform pulse current was used for depositing the coatings on the substrate. The objective of this research is to investigate the microstructural evolution of the coatings in response to the current density, duty cycle and the concentration of reinforcements in the bath. The influence of process parameters were also assessed in terms of the microhardness and specific wear rate. To enhance the surface properties of AZ80 magnesium alloy, a three component layer was successfully applied via electro co-deposition technique for the first time. The magnesium alloy substrates were cleaned and pretreated as per ASTM B480−88. The pretreated samples were coated at three levels of current density viz. 1.5 A/dm2, 2 A/dm2 and 2.5 A/dm2, and the duty cycle was varied between 30%, 40% and 50%. The concentrations of reinforcements in the bath were kept at 0 g/L, 0.5 g/L and 1 g/L. The samples were coated according to Taguchi L9 orthogonal array with two replications. The microstructural studies conducted using scanning electron microscope (SEM) revealed the defects, grain refinement and homogeneous distribution of reinforcements in the Ni matrix. The deposition and orientation of reinforcements in preferred planes were investigated with XRD. Vickers microhardness tests conducted as per ASTM E384-17 revealed that the sample coated with 2.5 A/dm2current density, 30 % duty cycle, 1 g/L B4C and 0.5 g/L TiC produced the coatings with the highest hardness of 412.56 Hv. The results of the pin on disc wear tests conducted according to ASTM G99 were in agreement with the hardness results and the corresponding microstructure. The sample with the maximum microhardness exhibited the minimum specific wear rate of 2.1 E-08 mm3/Nm. The ability of triangular pulse current waveform to deposit hybrid composite coatings on AZ80 magnesium alloy and enhance its surface properties has been confirmed by the results of this research.

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Section: Xrd Analysismentioning

confidence: 99%

Investigations on the properties of composite coatings electro co-deposited on AZ80 Mg alloy using triangular waveform pulse current

Pushpanathan¹,

Natarajan²,

Devaneyan³

2021

Surf. Topogr.: Metrol. Prop.

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“…However, high chemical reactivity of magnesium alloys is susceptible to corrosion and wear resistance, which hinders its widespread development [5][6][7] . Therefore, numerous surface modification techniques such as chemical transformation 8 , microarc oxidation 9 , chemical vapor depositions 10 , Electrodeposition 11,12 and electroless plating 13 are presented for obtaining corrosion resistant coatings on magnesium alloys.…”

Section: Introductionmentioning

confidence: 99%

Effect of Rare Earth on the Corrosion Resistance of Electroless Ni-Mo-P Composite Coatings

et al. 2022

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A kind of corrosion-resistant Ni-Mo-P composite coating was deposited on the surface of AZ91D magnesium alloy substrate by electroless plating method with different concentration of Ce(NO 3 ) 3 and Nd(NO 3 ) 3 . The deposition mechanism of Ni-Mo-P composite coating was explored. Furthermore, the effects of Ce(NO 3 ) 3 and Nd(NO 3 ) 3 concentration on the microstructure and properties of Ni-Mo-P composite coatings were studied. Results indicated that the Ni-Mo-P composite coatings prepared by adding the optimal concentration of Ce(NO 3 ) 3 and Nd(NO 3 ) 3 had few defects. Meanwhile, the deposition rate of the composite coatings and the adhesion between the coating and the magnesium alloy substrate were improved. When the concentration of Ce(NO 3 ) 3 and Nd(NO 3 ) 3 were 0.10 and 1.00 g/L, the Ni-Mo-P composite coatings had the minimum corrosion rate of 0.826 and 0.681 g/m 2 •h, respectively. Herein, compared with the addition of Ce(NO 3 ) 3 , the Nd(NO 3 ) 3 added Ni-Mo-P composite coating has the maximum arc radius of capacitive resistance and significant improvement corrosion resistance.

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“…For this purpose, the effective way of preventing corrosion is through the formation of a protective coating which acts as the barrier between the corrosive medium and the substrate [9][10][11] . Among various surface treatments 12,13 , environmentally friendly electroless plating without external power is advantageous to form a uniform and crack-free coating [14][15][16][17][18] . Therefore, electroless may be a promising candidate to face with the inevitable problems and extend the use of magnesium alloys 19,20 .…”

Section: Introductionmentioning

confidence: 99%

Effect of Na2WO4 Concentration on the Microstructure and Corrosion Behavior of Ni-W-P Ternary Alloy Coatings

et al. 2021

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Ni-W-P ternary coating was successfully deposited on AZ91D magnesium alloy by electroless plating with low energy consumption. The effect of Na 2 WO 4 concentration on the microstructure, deposition rate, corrosion behavior, adhesion force, porosity test and micro-hardness of Ni-W-P ternary coatings were evaluated. Results reveal that when the concentration of Na 2 WO 4 is 15 g/L in the plating solution, the coating with the average thickness of 17 μm is uniform and dense, and the content of phosphorus and tungsten reached 9.63 wt.% and 1.14 wt.% respectively, which presents amorphous structure. Meanwhile, when the concentration of Na 2 WO 4 is 15 g/L, the amorphous Ni-W-P ternary coating has the best corrosion resistance, among which E corr is -0.326 V, I corr is 0.003 A/cm 2 in 3.5 wt.% NaCl solution. In addition, the mechanisms of corrosion resistance for the substrate and the coating were exploded.

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Effect of TiC Particles Concentration on Microstructure and Properties of Ni-TiC Composite Coatings

Cited by 9 publications

References 21 publications

Investigations on the properties of composite coatings electro co-deposited on AZ80 Mg alloy using triangular waveform pulse current

Investigations on the properties of composite coatings electro co-deposited on AZ80 Mg alloy using triangular waveform pulse current

Effect of Rare Earth on the Corrosion Resistance of Electroless Ni-Mo-P Composite Coatings

Effect of Na2WO4 Concentration on the Microstructure and Corrosion Behavior of Ni-W-P Ternary Alloy Coatings

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