Towards a high strength ductile Ni/Ni3Al/Ni multilayer composite using spark plasma sintering

Mardiha, Pourya; Bahrami, Abbas; Mohammadnejad, Ali

doi:10.2298/sos1904401m

Cited by 21 publications

(6 citation statements)

References 18 publications

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“…NiAl and Ni 3 Al are both high temperature structural materials with a high melting point. Ni 3 Al is a face-centered cubic structure with a melting point of about 1400 • C, while NiAl is a body-centered cubic structure with a melting point of about 1640 • C. NiAl has a higher melting point and more advantages in terms of high-temperature oxidation resistance [28]. The EDS results suggest that the (Ni,Pt)Al coating underwent a phase change from β to γ .…”

Section: Cross-section Morphology With and Without Coating After Ther...mentioning

confidence: 98%

Microstructure and Nanoindentation Evolution of (Ni,Pt)Al Coating on IC21 Substrate at 1100 °C

Liu

Yin

et al. 2022

Coatings

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In this study, a ~20 μm (Ni,Pt)Al coating was applied to an IC21 substrate via electroplating followed by aluminizing. A thermal exposure test at 1100 °C in air was used to investigate the microstructure evolution and nanoindentation behavior of samples with and without coating. The experimental results show that the (Ni,Pt)Al coating caused a phase change from β-(Ni,Pt)Al to Ni3Al, and the Topologically Close-Packed (TCP) phase at the interdiffusion zone grew larger after thermal exposure for 200 h at 1100 °C, while a layer of γ’ phase was formed on the surface of the IC21 substrate. The nanoindentation test indicated that the elastic modulus was reduced in both annealed samples (with and without coating), and after annealing the sample with coating had higher elastic modulus than the sample without coating. This result reveals that the coating effectively prevented the precipitation of refractory metal elements and the coarsening of the microstructure in the substrate, and thus shows that the coating had advantages not only in terms of improving the high-temperature oxidation properties of the substrate, but also played a significant role in improving the mechanical properties of the substrate.

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Section: Cross-section Morphology With and Without Coating After Ther...mentioning

confidence: 98%

Microstructure and Nanoindentation Evolution of (Ni,Pt)Al Coating on IC21 Substrate at 1100 °C

Liu

Yin

et al. 2022

Coatings

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“…Even though Cu has attracted considerable attention as an alternative to Ag owing to its cost-effectiveness and superior conductivity, Cu electrodes are vulnerable to oxidation under high-temperature and high-humidity conditions and are susceptible to corrosion in aggressive media. In contrast to Cu, Ni has a high corrosion resistance and heat resistance, along with a color similar to that of Ag; hence, it is widely used for plating metals [86][87][88], composite materials [89][90][91], and catalysts in electrochemical devices [92,93]. On the other hand, NiO can be used as a semiconductor electrode for various applications, such as resistive switching memory [94,95], batteries [96,97], sensors [98,99], solar cells [100,101], and organic light-emitting devices [102][103][104].…”

Section: Niomentioning

confidence: 99%

Laser digital patterning of conductive electrodes using metal oxide nanomaterials

et al. 2020

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As an alternative approach to the conventional deposition and photolithographic processes, the laser digital patterning (LDP) process, which is also known as the laser direct writing process, has attracted considerable attention because it is a non-photolithographic, non-vacuum, on-demand, and cost-effective electrode fabrication route that can be applied to various substrates, including heat-sensitive flexible substrates. The LDP process was initially developed using noble metal nanoparticles (NPs) such as Au and Ag because such materials are free from oxidation even in a nanosize configuration. Thus, the NPs must be fused together to form continuous conductive structures upon laser irradiation. However, common metals are easily oxidized at the nanoscale and exist in oxidized forms owing to the extremely large surface-to-volume ratio of NPs. Therefore, to fabricate conductive electrodes using common metal NPs via the LDP process, laser irradiation should be used to sinter the NPs and simultaneously induce additional photochemical reactions, such as reduction, and defect structure modification to increase the conductivity of the electrodes. This review summarizes recent studies on the LDP process in which metal oxide NPs, such as ITO, ZnO, CuO, and NiO, were exclusively utilized for fabricating conductive electrodes. The outlook of the LDP process for these materials is also discussed as a method that can be used together with or as a replacement for conventional ones to produce next-generation transparent conductors, sensors, and electronics.

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“…Room temperature powder processing routes, and more specifically mechanical alloying, have been suggested as an alternative to liquid-based production methods [15,16]. Mechanical alloying is a widely used powder metallurgy technique with the possibility of controlling the morphologies of powders [17]. More importantly, compared with vacuum melting techniques, mechanical alloying is known to be much cheaper and more cost-effective.…”

Section: Introductionmentioning

confidence: 99%

Phase Stability, Microstructure, and Mechanical Properties of Spark Plasma Sintered Nanocrystalline Boron-Doped AlCoFeMnNi High-Entropy Alloy

Pourmohammadi

Mohammadnejad

Bahrami

et al. 2023

Metals

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The microstructure and mechanical properties of mechanically alloyed and spark plasma sintered AlCoFeMnNi-xB (x = 0, 0.5, 1, and 5 at. %) high-entropy alloys (HEAs) have been investigated. Boron-doped HEAs were synthesized using mechanical alloying up to 50 h of milling. Synthesized powders were then consolidated at 850, 900, and 950 °C for 10 min under a uniaxial pressure of 40 MPa using spark plasma sintering (SPS). A scanning electron microscope, which was equipped with energy dispersive spectroscopy (EDS), together with an optical microscope (OM) were used to analyze the microstructural evolution. X-ray diffraction analysis was used to differentiate the phases formed in the solution. The mechanical properties of the sintered specimens were analyzed using the shear-punch test (SPT). The fracture surface of the SPT samples was studied using SEM. Thermodynamic calculations revealed that by employing this process, it is possible to produce solid solution HEAs with a duplex FCC + BCC structure. It was shown that boron-doped AlCoFeMnNi high-entropy alloys contain some unique attributes. SPS at 900 °C for a sample with boron up to 0.5 at. % leads to the formation of an alloy with the highest shear strength. A further increase in the boron content in the boron-doped HEAs exhibited a decrease in the maximum shear strength. Finally, the correlations between the microstructural and mechanical characteristics of the sintered boron-containing high-entropy alloys are discussed.

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Towards a high strength ductile Ni/Ni3Al/Ni multilayer composite using spark plasma sintering

Cited by 21 publications

References 18 publications

Microstructure and Nanoindentation Evolution of (Ni,Pt)Al Coating on IC21 Substrate at 1100 °C

Microstructure and Nanoindentation Evolution of (Ni,Pt)Al Coating on IC21 Substrate at 1100 °C

Laser digital patterning of conductive electrodes using metal oxide nanomaterials

Phase Stability, Microstructure, and Mechanical Properties of Spark Plasma Sintered Nanocrystalline Boron-Doped AlCoFeMnNi High-Entropy Alloy

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