Fabrication and characterization of TiB2-TiC-Co wear-resistant coatings on AZ91D magnesium alloy

Shen, Jun; Zou, Binglin; Dong, Shujuan; Xi, Cai; Cao, Xueqiang

doi:10.1016/j.surfcoat.2019.02.090

Cited by 16 publications

(4 citation statements)

References 33 publications

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“…[77][78][79] Comparatively, sol-gel coatings can easily be applied to large surfaces with better uniformity. The composite materials coated AZ91D alloy has been explored for many applications, [80][81][82][83][84][85][86] which is schematically represented in Figure 8.…”

Section: Composite Coatingsmentioning

confidence: 99%

An Impact of the Recent Developments in Coating Materials and Techniques on the Corrosion Response of AZ91D Alloy: A Review

et al. 2023

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AZ91D, a die‐casted alloy, offers several benefits (better saltwater corrosion resistance, suitable castability, and good atmospheric stability) over other grades of magnesium alloy. However, it cannot overcome the challenging requirements of advanced applications in its current form. Extensive research in coating technologies is crucial in enhancing the performance of AZ91D alloy in highly corrosive environments (coastal and marine, industrial, farm, etc.). The high corrosion resistance of AZ91D for various applications is achievable through the deposition of different materials. Developments in coating materials and techniques, with their influence on the corrosion protection behavior of AZ91D alloy, over the last decade (2012–2022), are focused on in this study. It is observed that composite, biodegradable, and self‐healing coatings are gaining popularity. The transition in the coating technology, from conventional to self‐healing coating materials and from conventional to environment‐friendly coating techniques, is a vital part of this discussion. This review further explores how different additives, pre‐treatments, post‐treatments, and corrosion inhibitors affect the corrosion performance of coatings. This study helps select the optimum coating material for AZ91D magnesium alloy to fulfil a specific application requirement and guides toward technological developments in this segment.

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Section: Composite Coatingsmentioning

confidence: 99%

An Impact of the Recent Developments in Coating Materials and Techniques on the Corrosion Response of AZ91D Alloy: A Review

et al. 2023

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“…Therefore, surface protection is inevitable for magnesium alloys to survive the harsh servicing conditions. The literature published in the surface protection of magnesium alloys in the past few years indicate that extensive research has been carried out in enhancing the corrosion and wear resistance of magnesium alloys like AZ31, AM50, AZ91D, Mg-8Li-2Ca, Mg-8Al-0.5Zn, MA8 [3][4][5][6][7].…”

Section: Introductionmentioning

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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“…Atmospheric plasma spraying (APS) has been widely used to make coatings on metal substrates to improve their wear and corrosion resistance 1‐6 . Among various coatings, WC‐Co coatings are increasingly attractive because of their extreme high hardness, excellent wear resistance, and good toughness 7‐10 .…”

Section: Introductionmentioning

confidence: 99%

“…Atmospheric plasma spraying (APS) has been widely used to make coatings on metal substrates to improve their wear and corrosion resistance. [1][2][3][4][5][6] Among various coatings, WC-Co coatings are increasingly attractive because of their extreme high hardness, excellent wear resistance, and good toughness. [7][8][9][10] Traditionally, the WC-Co powders used for spraying process were prepared by granulating the ball-milled powders.…”

Section: Introductionmentioning

confidence: 99%

Utilizing the autocatalysis of Co to prepare low‐cost WC‐Co powder for high‐performance atmospheric plasma spraying

Zhang

Yue

et al. 2020

J Am Ceram Soc

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A novel method of incorporating fluidized bed chemical vapor deposition (FBCVD) with electroless plating was developed to effectively prepare the core-shell structured WC-Co composite powders. The Co nanoparticles decorated on the surface of WC particles by FBCVD acted as active catalysts for the subsequent electroless plating process. The particle size and quantity of the decorated Co particles determined the electroless plating rate but the particle size played more important role. For the conditions tested, the maximum electroless plating rate of 2.34 mg/g/min was obtained by using an optimal FBCVD pretreatment at 750°C for 3 minutes. WC-12Co composite powders with a commercial composition widely used for atmospheric plasma spraying (APS) were efficiently prepared. The composite powders exhibited excellent suitability for APS by forming a homogenous CoW -C ternary liquid stream. The APS coating is not only well-bonded with the substrate but also consisted of hard nonequilibrium Co 3 W 3 C and W 2 C phases with a uniform distribution. Both remarkably improved the hardness and tribological properties of the APS coating.

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Fabrication and characterization of TiB2-TiC-Co wear-resistant coatings on AZ91D magnesium alloy

Cited by 16 publications

References 33 publications

An Impact of the Recent Developments in Coating Materials and Techniques on the Corrosion Response of AZ91D Alloy: A Review

An Impact of the Recent Developments in Coating Materials and Techniques on the Corrosion Response of AZ91D Alloy: A Review

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

Utilizing the autocatalysis of Co to prepare low‐cost WC‐Co powder for high‐performance atmospheric plasma spraying

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