Improved hardness and wear resistance of plasma sprayed nanostructured NiCrBSi coating via short-time heat treatment

Chen, Liang‐Yu; Xu, Tianxiang; Lu, Sheng; Wang, Zexin; Chen, Shujin; Zhang, Lai-Chang

doi:10.1016/j.surfcoat.2018.07.037

Cited by 94 publications

(51 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Voids are the non-bonded boundaries between particles. Therefore, such flaws would play an important role in hardness and corrosion [26,31,32]. Detailed optical images for the cross-sectional microstructures of the as-sprayed 50-75C and 75-100C are shown in Figure 5.…”

Section: Microstructural Featuresmentioning

confidence: 99%

“…Such findings indicate that the as-sprayed NiCrBSi coatings prepared by different-sized particles demonstrate different melting degrees and porosities. It is well known that amorphous phase is inevitably produced in the plasma sprayed NiCrBSi coatings [26,27]. Therefore, a short-time low-temperature annealing at 440 • C for 15 min was applied to exclude the influence of the amorphous phase on the properties of the as-sprayed NiCrBSi samples.…”

Section: Microstructural Featuresmentioning

confidence: 99%

“…Such a difference in the thicknesses of the as-sprayed coatings is attributed to the different particle sizes of the powder used since large particles might be unmelted and may not adhere well to the surface of the sample [25]. Amorphous phases are often found in Ni-based alloy coatings, which can influence their hardness and even mechanical properties [26,27]. Therefore, in order to eliminate the influence of the amorphous phase and elucidate the effect of the particle size on the properties of the as-sprayed NiCrBSi samples, the samples were annealed at 440 • C in a furnace for a short time (15 min).…”

Section: Introductionmentioning

confidence: 99%

“…Then these annealed samples were used as references in the other examinations. The details of the process can be found in our previous work [26].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Particle Size-Dependent Microstructure, Hardness and Electrochemical Corrosion Behavior of Atmospheric Plasma Sprayed NiCrBSi Coatings

Sang

Chen

Zhao

et al. 2019

Metals

Self Cite

View full text Add to dashboard Cite

Particle size is a critical consideration for many powder coating-related industries since it significantly influences the properties of the produced materials. However, the effect of particle size on the characteristics of plasma sprayed NiCrBSi coatings is not well understood. This work investigates the microstructures, hardness and electrochemical corrosion behavior of plasma sprayed NiCrBSi coatings synthesized using different-sized powders. All coatings mainly consist of Ni, N 3 B, CrB, Cr 7 C 3 and Cr 3 C 2 phases. The coatings produced by small particles (50-75 µm) exhibit lower porosity (2.0 ± 0.8%). Such coatings show a higher fraction (15.5 vol.%) of the amorphous phase and lower hardness (700 HV 0.5 ) than the counterparts (8.7 vol.% and 760 HV 0.5 , respectively) produced by large particles (75-100 µm) with higher porosity (3.0 ± 1.6%). Meanwhile, the coatings produced from smaller particles possess a larger number of non-bonded boundaries, leading to the easier penetration of corrosive medium, as well as a higher corrosion current density (0.254 ± 0.062 µA/cm 2 ) and a lower charge transfer resistance (0.37 ± 0.07 MΩ cm 2 ). These distinctions are attributed to particle size-induced different melting degrees and stackings of in-flight particles during deposition. studied the effects of particle size and structure on the preferential Ce evaporation for La 2 Ce 2 O 7 particles during plasma spraying and indicated that the evaporation loss of Ce is significantly influenced by particle size, thereby affecting the properties of the as-sprayed La 2 Ce 2 O 7 coatings. Sun et al. [16] used different-sized WC powders to sinter three sets of WC-8Co cemented carbides and found that the transgranular fractures of the prepared cemented carbides are more evident with increasing WC particle size. From all this one can conclude that powder appearance potentially influences the properties and therefore the end applications of the produced products.NiCrBSi alloy coatings are also commonly prepared by metallic powder-related techniques including spraying [17,18] and laser cladding [19,20], with the aim to produce barriers to protect substrates from wear and/or corrosion. Amongst these techniques, atmospheric plasma spraying (APS) is frequently used due to its high synthesis speed and few limitations on equipment [21]. APS adopts a plasma gun as a heat source to melt the feedstock powder sprayed from the nozzle and impinges these powder particles on the substrates in a layer by layer method [22]. As a result, this processing method results in a typical lamellar microstructure in APS-prepared NiCrBSi coatings associated with a large number of pores and non-bonded boundaries (including lamellar boundaries and particle boundaries). Pores generally decrease the cohesion of the as-sprayed NiCrBSi coatings, thereby reducing their hardness and wear resistance [22]. In the meantime, non-bonded boundaries in as-sprayed NiCrBSi coatings provide diffusion paths for the ingress of corrosive species in a corrosive environment [22]. ...

show abstract

Section: Microstructural Featuresmentioning

confidence: 99%

Section: Microstructural Featuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Then these annealed samples were used as references in the other examinations. The details of the process can be found in our previous work [26].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Particle Size-Dependent Microstructure, Hardness and Electrochemical Corrosion Behavior of Atmospheric Plasma Sprayed NiCrBSi Coatings

Sang

Chen

Zhao

et al. 2019

Metals

Self Cite

View full text Add to dashboard Cite

show abstract

“…In general, the degradation rate of alloys can be controlled mainly by tailoring their compositions or by conducting surface treatments [24,25]. Surface treatment can effectively improve the corrosion resistance of alloys, and conversion coating, anodizing, micro-arc oxidation (MAO), and other technologies are representatives of this treatment [26][27][28][29][30]. Hakimizad et al [31] reported that micro-arc oxidation coatings are formed by numerous short-lived micro-arc discharges on the entire surface occurring at voltages higher than the breakdown voltages of the oxide coating, the hard, thick, and adherent oxide coatings on light metals (e.g., Al and Mg) and on their alloys can be obtained by micro-arc oxidation technology.…”

Section: Introductionmentioning

confidence: 99%

Degradation Behavior of Micro-Arc Oxidized ZK60 Magnesium Alloy in a Simulated Body Fluid

Wang

Chen

et al. 2018

Metals

Self Cite

View full text Add to dashboard Cite

Bio-ceramic coatings were synthesized on ZK60 magnesium alloys by micro-arc oxidation (MAO). The degradation behavior of the ZK60 alloys with and without MAO coating in the simulated body fluid (SBF) was studied. The samples were characterized by means of scanning electron microscopy (SEM), laser scanning confocal microscopy (CLSM), and X-ray diffraction (XRD). Electrochemical impedance spectroscopy (EIS) was used to study the degradation behavior. The results showed that the porous MAO coating mainly consisted of MgO, Mg2SiO4, Mg3(PO4)2, and CaCO3. The pH values of both coated and uncoated samples increased over time. However, the pH values of the SBF for coated samples always maintained a lower level compared with those for the uncoated samples. Thereby, the coated samples showed a much lower degradation rate. After immersion in SBF for 5 days, corrosion product containing Ca and P was found on both samples, while the deposition was more active on the coated samples. The degradation models for the uncoated and coated samples in the SBF are also proposed and discussed.

show abstract

A Review on Biomedical Titanium Alloys: Recent Progress and Prospect

2019

View full text Add to dashboard Cite

Compared with stainless steel and Co-Cr-based alloys, Ti and its alloys are widely used as biomedical implants due to many fascinating properties, such as superior mechanical properties, strong corrosion resistance, and excellent biocompatibility. After briefly introducing several most commonly used biomedical materials, this article reviews the recent development in Ti alloys and their biomedical applications, especially the low-modulus β-type Ti alloys and their design methods. This review also systemically investigates the recently attractive progress in preparation of biomedical Ti alloys, including additive manufacturing, porous powder metallurgy, and severe plastic deformation, applied in the manufacturing and the influenced microstructures and properties. Nevertheless, there are still some problems with the long-term performance of Ti alloys, and therefore several surface modification methods are reviewed to further improve their biological activity, wear resistance, and corrosion resistance. Finally, the biocompatibility of Ti and its alloys is concluded. Summarizing the findings from literature, future prediction is also conducted. Darmstadt. His current research interest is focusing on the metal additive manufacturing (e.g. selective laser melting, electron beam melting), titanium alloys and composites, and processing-microstructure-properties in high-performance materials.

show abstract

Improved hardness and wear resistance of plasma sprayed nanostructured NiCrBSi coating via short-time heat treatment

Cited by 94 publications

References 43 publications

Particle Size-Dependent Microstructure, Hardness and Electrochemical Corrosion Behavior of Atmospheric Plasma Sprayed NiCrBSi Coatings

Particle Size-Dependent Microstructure, Hardness and Electrochemical Corrosion Behavior of Atmospheric Plasma Sprayed NiCrBSi Coatings

Degradation Behavior of Micro-Arc Oxidized ZK60 Magnesium Alloy in a Simulated Body Fluid

A Review on Biomedical Titanium Alloys: Recent Progress and Prospect

Contact Info

Product

Resources

About