YSZ-Reinforced Ni-P Deposit: An Effective Condition for High Particle Incorporation and Porosity Level

Baba, Nor Bahiyah; Davidson, Alan; Muneer, Tariq

doi:10.4028/www.scientific.net/amr.214.412

Cited by 9 publications

(6 citation statements)

References 7 publications

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“…There are two sizes of 8YSZ used, micro-sized with of nominal diameter of 2 m and nano-sized particles ranging between 100-500 nm. The optimum particle loading is in the range of 5-10 g/L as used by Baba et al, [9]. The particle loading for both sizes used is 10 g/L and the mixed particle size is by a ratio of 1:1.…”

Section: Methodology 21 Materials Preparationmentioning

confidence: 99%

“…The incorporation of ceramic particles into the Ni-P deposit produces a cermet such as silicon carbide work done by Ahmadkaniha et al, [4], nano-diamond and diamond work done by Mirhosseini et al, [6] and Trzaska et al, [7], and cubic boron nitride by Norsilawati et al, [8]. The influence of electroless coating parameters play an important effect on the deposit quality and the incorporation of particle quantity can be enhanced by using smaller size particle, stirring agitation, and blasting surface treatment as reported by Baba et al, [9]. It was also found by Ashtiani et al, [10] that different types of complexing agents in the electroless nickel bath also give affect the deposit properties.…”

Section: Introductionmentioning

confidence: 95%

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Influence of Heat Treatment on Microhardness and Surface Roughness of Electroless Ni-YSZ Composite Coating

Baba

Ghazali

Rahman

et al. 2022

ARFMTS

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The application of heat treatment was introduced in Ni-YSZ composite coating as the incorporation of ceramic YSZ in electroless nickel deposition is new and worth investigating. In this paper, the influence of heat treatment by varying the heating temperature and time on the electroless Ni-YSZ composite coating is investigated. The Ni-YSZ composite is deposited onto a high-speed steel substrate via electroless nickel co-deposition. YSZ powder of mixed sizes of micro- and nano-sized of the ratio of 1:1 is incorporated in the electroless deposits. The electroless Ni-YSZ composites coating was heated up to 400oC for a maximum of 2 hours. The microhardness measurements were carried out using a Vickers microhardness tester (Shimadzu) according to ISO 6507-4. The surface roughness of the coating was measured using Mitutoyo surface roughness tester SJ-301. The surface characterisation was analysed using Cambridge Stereoscan 90 Scanning Electron Microscope (SEM) coupled with Energy Dispersive X-ray Analysis (EDX). The crystallographic structure of materials was analysed by X-ray diffraction (XRD) Bruker D8 Advance instrument. The microhardness and surface roughness of the coating both increase with time. The microhardness is directly proportional to the heating temperature and time and these observations are supported by the XRD analysis. The surface roughness observation is explained by the SEM micrographs.

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Section: Methodology 21 Materials Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Influence of Heat Treatment on Microhardness and Surface Roughness of Electroless Ni-YSZ Composite Coating

Baba

Ghazali

Rahman

et al. 2022

ARFMTS

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“…As seen in Table 2, the deposit structure changes because the phosphorus or boron content changes. EN bath concentration, temperature, pH, agitation, and bath loading effect the EN process [14].…”

Section: Electroless Nickelmentioning

confidence: 99%

Characterisation and Application of Nickel Cubic Boron Nitride Coating via Electroless Nickel Co-Deposition

Norsilawati¹,

Baba²,

Said³

et al. 2022

Characteristics and Applications of Boron

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The chapter describes the characterisation and application of nickel cubic boron nitride (Ni-CBN) coatings using the electroless nickel co-deposition method. Two different types of substrates were used, that is, high-speed steel (HSS) and carbide. The characterisation of Ni-CBN coating was conducted using Field Emission Scanning Electron Microscope (FESEM) JSM-7800F coupled with Energy-Dispersive X-ray (EDX). As for the application, coated end mill cutting tools were inserted into DMU 50 CNC machine to conduct the machining testing. Cutting speed, feed rate, and depth of cut were chosen for the Taguchi L9 3-level factors. Taguchi analysis was employed to determine the optimal parameters for the Ni-CBN (HSS) surface finish. The ANOVA evaluation was used to identify the most significant effect on surface finish parameters. The FESEM images prove that the nano-CBN powders were embedded in the Ni-CBN coatings and are uniformly distributed. The findings show Ni-CBN-coated tool life is 195 minutes compared to the uncoated is 143 minutes. The surface roughness, Ra values using Ni-CBN-coated tools ranges between 0.251 and 0.787 μm, whereas the uncoated tools Ra values between 0.42 and 1.154 μm. It can be concluded that Ni-CBN HSS cutting tools reduce tool wear and extend tool life. The Taguchi optimum machining condition obtained is 1860 RPM spindle speed, 334 mm/min feed rate, and 2 mm depth of cut.

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“…[6] [7] (iv) Electroless Plating The final step in the process is the nickel coating. There are two sub-steps relating to the chemistry within the coating, the initial phase and the auto-catalytic phase.…”

Section: (Ii) Pre-catalystmentioning

confidence: 99%

“…Around 20-40% is accepted as an adequate level of porosity (6). Baba et al (7) investigated the effect of particle size, agitation method, substrate condition and bath pH on porosity. They found that the level of porosity was increased by using a combination of small particle size (2 µm instead of 10 µm).mechanical stirring agitation and a substrate surface treatment of mechanical blasting.…”

Section: Porositymentioning

confidence: 99%

Manufacture of Solid Oxide Fuel Cells Using Electroless Co-Deposition: A Review of Work Carried out at Edinburgh Napier University

2015

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This paper reviews work carried out at Edinburgh Napier University on the manufacture of anodes and cathodes for solid oxide fuel cells (SOFCs) using electroless co-deposition of nickel and ceramic powders. Most of the work has been focused on anodes where the co-deposition of nickel and yttria stabilised zirconia (YSZ) negates the need for traditional manufacturing methods such as screen printing and removes the need for expensive and time consuming high temperature consolidation of the ceramic part of the composite. Work has also been carried out manufacturing cathodes by electroless co-deposition replacing YSZ with lanthanum strontium manganite and lanthanum nickel ferrite. Anodes and cathodes of both planar and tubular designs of SOFCs have been successfully manufactured using this technique and process variables have included ceramic particle size, bath pH, ceramic loading, the inclusion of pore-formers and tubular orientation in the electroless bath. Testing of the electrodes included impedance analysis, long term degradation testing at 850 o C for 500 and 1000-hours, high temperature electrical conductivity measurements, scanning electron microscopy and energy dispersive X-ray analysis. The cost benefits of the electroless codeposition process compared with other conventional processes are also discussed.

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YSZ-Reinforced Ni-P Deposit: An Effective Condition for High Particle Incorporation and Porosity Level

Cited by 9 publications

References 7 publications

Influence of Heat Treatment on Microhardness and Surface Roughness of Electroless Ni-YSZ Composite Coating

Influence of Heat Treatment on Microhardness and Surface Roughness of Electroless Ni-YSZ Composite Coating

Characterisation and Application of Nickel Cubic Boron Nitride Coating via Electroless Nickel Co-Deposition

Manufacture of Solid Oxide Fuel Cells Using Electroless Co-Deposition: A Review of Work Carried out at Edinburgh Napier University

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