Adaptation of a mathematical model to the incorporation of silicon carbide particles in an electroless nickel deposit

Grosjean, A.; Rezrazi, M.; Berçot, P.; Tachez, M.

doi:10.1016/s0026-0576(97)86615-9

Cited by 13 publications

(5 citation statements)

References 2 publications

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“…Deposited Ni-P coatings have a higher corrosion resistance, physicomechanical and tribological properties compared to non-treated magnesium alloys. [5][6][7] Generally, the industry identifies three groups of electroless Ni-P coatings according to their phosphorus contents. Low-phosphorus coatings contain 2-5 % mass fractions of phosphorus, medium-phosphorus Ni-P coatings contain 6-9 % mass fractions of phosphorus and high-phosphorus Ni-P coatings contain 10-13 % mass fractions of phosphorus.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Ni-P coating prepared on a wrought AZ61 magnesium alloy via electroless deposition

Buchtík¹,

Kosár²,

Wasserbauer³

et al. 2017

Mater. Tehnol.

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A low-phosphorous Ni-P coating was prepared on a wrought AZ61 magnesium alloy via electroless deposition for 1 h after an adequate substrate-surface pre-treatment. The prepared coating with a thickness of 10 μm was characterized by the uniform distribution of Ni (95.4 % mass fraction) and P (4.6 % mass fraction) in the cross-section. Microcavities present in the coating resulted in quite a low corrosion resistance of the coated magnesium alloy in a 0.1 M NaCl solution. On the other hand, the coating exhibits a high degree of adhesion, as evidenced by a scratch test, and significantly improves the AZ61 magnesium-alloy microhardness. Keywords: electroless nickel, magnesium alloy, AZ61, characterization of Ni-P coatings Malo porozna Ni-P prevleka je bila pripravljena na povr{ini kovane AZ61 magnezijeve zlitine. Prevleka je bila pripravljena z enourno neelektri~no depozicijo na predhodno ustrezno obdelani povr{ini zlitine. Pripravljena prevleka debeline 10 μm je imela v pre~nem prerezu enakomerno porazdelitev Ni (95,4 % masnih odstotkov) in P (4,6 % masnih odstotkov). Zaradi prisotnosti mikropraznin v izdelani prevleki je korozijska odpornost prevle~ene magnezijeve zlitine v 0,1 M NaCl raztopini slaba. Preizkusi razenja prevleke pa so po drugi strani pokazali zelo dober oprijem izdelane prevleke s povr{ino zlitine in znatno izbolj{anje mikrotrdote AZ61 magnezijeve zlitine.

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Section: Introductionmentioning

confidence: 99%

Characterization of Ni-P coating prepared on a wrought AZ61 magnesium alloy via electroless deposition

Buchtík¹,

Kosár²,

Wasserbauer³

et al. 2017

Mater. Tehnol.

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“…The properties of Ni-SiC composite coatings have been improved by producing them as gradient coatings [23,26,43] and by using pulse technique or triangular waveform [23,24,35,44,45]. Nano composites have also been produced by electroless technique [37,[46][47][48][49][50]. The available data are varied due to the difference in the nature of the bath, type of SiC (α orβ) and its size, additives, current mode, or testing/ analyzing methods adopted, etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of Surfactants on the Electrodeposition of Ni-SiC Composites

Narasimman

Pushpavanama

Periasamyb

2012

Port. Electrochim. Acta

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The effect of various surfactants on the volume% codeposition of SiC in a nickel matrix was evaluated. Of the various surfactants tried, tetra methyl ammonium hydroxide (TMAH) was found to be the best for improving the quality of the deposits as well as the homogenous distribution of particles and with reasonable volume% of silicon carbide incorporation in the matrix. Composites were produced using 1 µm and 50 nanometer size powders. The effect of silicon carbide concentration and bath operating variables on the volume% of SiC incorporation in the deposit and the deposition rates were estimated. Substantial improvement in mechanical properties such as hardness and wear resistance was obtained with the nano SiC composite compared to the micro SiC composite.

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“…At 400°C heat treatment, the peak corresponding to SiC still exists with neither shifting of 2θ position nor formation of additional peaks consisting of silicon, indicating the thermal stability of Si-C bond resulting in no side bond formation with the metal matrix (NiP) or with other elements. The observation is a confirmation of the fact that there is no molecular bonding mechanism between the particles and metal matrix for the formation of composite coating but an impingement and settling of particles on the surface and subsequent envelopment of these particles by the matrix material [5,15]. On further annealing up to 500°C, there is no evidence of the formation of NixSiy implying that the stability of SiC still persists.…”

Section: Phase Structurementioning

confidence: 59%

“…In other words, the particles are simply enveloped in the metal matrix by impingement and settling on the surface of the specimen during the course of coating development without affecting the original microstructure of metal matrix [5,6,11,15]. On annealing at elevated temperature, crystallization occurs with the formation of Ni3P giving rise to many sharp X-ray diffraction peaks.…”

Section: Introductionmentioning

confidence: 99%

Phase composition, microstructure and microhardness of electroless nickel composite coating co-deposited with SiC on cast aluminium LM24 alloy substrate

Franco

Sha

Malinov

et al. 2013

Surface and Coatings Technology

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Rajendran, R. (2013). Phase composition, microstructure and microhardness of electroless nickel composite coating co-deposited with SiC on cast aluminium LM24 alloy substrate. Surface and Coatings Technology, 235,[755][756][757][758][759][760][761][762][763] 600048, IndiaAbstract: Electroless Ni-P (EN) and composite Ni-P-SiC (ENC) coatings were developed on cast aluminium alloy substrate, LM24. The coating phase composition, microstructure and microhardness were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) and microhardness tester, respectively, on as-plated and heat-treated specimens. The original microstructure of the Ni-P matrix is not affected by the inclusion of the hard particles SiC. No formation of Ni-Si phase was observed up to 500°C of heat treatment. The microhardness is increased on incorporation of SiC in Ni-P matrix. The hardening mechanism is the formation of intermetallic phase Ni3P on annealing at elevated temperature.

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Adaptation of a mathematical model to the incorporation of silicon carbide particles in an electroless nickel deposit

Cited by 13 publications

References 2 publications

Characterization of Ni-P coating prepared on a wrought AZ61 magnesium alloy via electroless deposition

Characterization of Ni-P coating prepared on a wrought AZ61 magnesium alloy via electroless deposition

Effect of Surfactants on the Electrodeposition of Ni-SiC Composites

Phase composition, microstructure and microhardness of electroless nickel composite coating co-deposited with SiC on cast aluminium LM24 alloy substrate

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