Tribological and mechanical investigation of multi-directional forged nickel

Djavanroodi, F.; Ebrahimi, Mahmoud; Nayfeh, Jamal

doi:10.1038/s41598-018-36584-w

Cited by 30 publications

(13 citation statements)

References 51 publications

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“…Multiple measurements were conducted, resulting in an average hardness of HV 86 with a standard deviation of HV 4. Recent measurements of the Vickers hardness for cast, but unworked, nickel are all between HV 81 and 90 [18,19,20].…”

Section: Resultsmentioning

confidence: 99%

Reduction Expansion Synthesis of Sintered Metal

et al. 2019

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Described herein is a novel method, Reduction Expansion Synthesis-Sintered Metal (RES-SM), to create a sintered metal body of a designed shape at ambient pressure, hundreds of degrees below the metal melting temperature. The precursor to the metal part is a mixture of metal oxide particles and activated metal particles, and in this study specifically nickel oxide and activated nickel metal particles. It is postulated that the metal oxide component is reduced via exposure to chemical radical species produced via thermal decomposition of urea or other organic compounds. In the study performed, the highest temperature required was 950 °C, the longest duration of high temperature treatment was 1200 s, and in all cases, the atmosphere was inert gas at ambient pressure. As discovered using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and x-ray diffraction (XRD), the metal that forms via the RES process presents necks of completely reduced metal between existing metal particles. The ‘as produced’ parts are similar in properties to ‘brown’ metal parts created using more standard methods and require ‘post processing’ to full densify. Parts treated by hot isostatic pressing show fully self-supporting, robust structures, with hardness values like others reported in literature for traditional fabrication methods. This novel method uses affordable and environmentally friendly precursors to join metallic parts at moderate temperatures, produces fully reduced metals in a very short time and has potential to make many parts simultaneously in a standard laboratory furnace.

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Section: Resultsmentioning

confidence: 99%

Reduction Expansion Synthesis of Sintered Metal

et al. 2019

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“…Conventionally, the hydrometallurgical approaches were applied for recovering the precious metals from mineral ores, but they can also be used for recycling waste electric/electronic equipment (WEE) through acid or the caustic leaching of selective dissolutions of the targeted metals [51]. Subsequently, the solution with the targeted metallic species and possible impurities is further refined, concentrating the metallic compounds by solvent extraction, adsorption, or ion exchange processes [2,52,53]. Eventually, by the utilization of electrorefining or electrochemical reduction reactions, the metallic target material is recycled from the E-waste.…”

Section: Hydrometallurgical Approachesmentioning

confidence: 99%

Photocatalytic Materials Obtained from E-Waste Recycling: Review, Techniques, Critique, and Update

Bahadoran

Lile

Masudy‐Panah

et al. 2022

JMMP

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Waste-derived materials obtained from the recovery and recycling of electronic waste (e-waste) such as batteries and printed circuit boards have attracted enormous attention from academia and industry in recent years, especially due to their eco-friendly nature and the massive increment in e-waste due to technological development. Several investigations in the literature have covered the advances achieved so far. Meanwhile, photocatalytic applications are especially of interest since they maintain mutual benefits and can be used for H2 production from solar water splitting based on semiconductor processing as a proper environmentally friendly technique for solar energy conversion. In addition, they can be utilized to degrade a variety of organic and non-organic contaminations. Nonetheless, to the best of the authors’ knowledge, there has not been any comprehensive review that has specifically been focused on e-waste-derived photocatalytic materials. In this regard, the present work is dedicated to thoroughly discussing the related mechanisms, strategies, and methods, as well as the various possible photocatalysts synthesized from e-wastes with some critiques in this field. This brief overview can introduce modern technologies and promising possibilities for e-waste valorization, photocatalytic processes, and new photocatalytic degradation methods of eco-friendly nature. This paper discusses various e-waste-obtained photocatalytic materials, synthesis procedures, and applications, as well as several types of e-waste, derived materials such as TiO2, ZnO, indium tin oxide, and a variety of sulfide- and ferrite-based photocatalytic materials.

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“…Several processing methodologies are extensively used to improve the properties of the bulk and nanostructured MG. Severe plastic deformation (SPD) is a technique that deforms the atomic structure of the material and results in the modification in their chemistry and microstructure at the nanoscale (Ebrahimi, 2017;Ebrahimi and Shamsborhan, 2017;Djavanroodi et al, 2019). Several reports explored some exciting properties of the MG due to the deformation phenomena at the nanoscale (Valiev et al, 2000;Dmowski et al, 2010;Peng et al, 2011;Hufnagel et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Assessment of Severe Plastic Deformation Processes in Bulk and Nanostructured Metallic Glass

et al. 2022

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The metallic glasses are known as amorphous and metastable materials. These materials have superior mechanical properties over crystalline materials with the same chemistry. Continuous efforts were made to improve the properties of metallic glass. The severe plastic deformation (SPD) method is used to improve the ductility of the glass. SPD causes the deformation at the atomic level in the disordered structure of the glass. Many methods are reported, such as cryogenic cycling, high-pressure torsion, and equal channel angular pressing, which are used for the SPD. In recent works on nanostructured metallic glasses, it has been evidenced that some properties, for example, mechanical, thermal, and magnetic, have improved compared to the bulk metallic glass. This paper has reviewed the recent progress in the SPD of the bulk and nanostructured metallic glasses. Different methods for the SPD have been addressed here. The effect of SPD on the properties of metallic glass is deliberated in this paper. Moreover, the challenging tasks of deformation occurrence in the glass and its characterization were considered, trying to develop a sound understanding of SPD in bulk and nanostructured metallic glasses.

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Tribological and mechanical investigation of multi-directional forged nickel

Cited by 30 publications

References 51 publications

Reduction Expansion Synthesis of Sintered Metal

Reduction Expansion Synthesis of Sintered Metal

Photocatalytic Materials Obtained from E-Waste Recycling: Review, Techniques, Critique, and Update

Assessment of Severe Plastic Deformation Processes in Bulk and Nanostructured Metallic Glass

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