Sintering of grey cast iron powder recycled via jet milling

Shaibani, Mahdokht; Eshraghi, Nicolas; Ghambari, Mohammad

doi:10.1016/j.matdes.2012.11.058

Cited by 11 publications

(4 citation statements)

References 17 publications

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“…This grinding step was carried out under an argon atmosphere to avoid the presence of oxygen and oxidation of silicon upon contact with air. 41 SEM-EDS results presented in Figure S4 demonstrate 2.15 atom % of oxygen in the pregrinded powder and 2.18 atom % for the milled powder at 300 rpm (20 h). This oxygen content corresponds to the native oxide layer on silicon after the leaching step.…”

Section: ■ Results and Discussionmentioning

confidence: 98%

“…The procedure was carried out for powders from both leached and unleached Si wafer fragments, to investigate the impact of Al, Ag, and Pb impurities. This grinding step was carried out under an argon atmosphere to avoid the presence of oxygen and oxidation of silicon upon contact with air . SEM-EDS results presented in Figure S4 demonstrate 2.15 atom % of oxygen in the pregrinded powder and 2.18 atom % for the milled powder at 300 rpm (20 h).…”

Section: Resultsmentioning

confidence: 99%

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Recovery of Nano-Structured Silicon from End-of-Life Photovoltaic Wafers with Value-Added Applications in Lithium-Ion Battery

Eshraghi

Berardo

Schrijnemakers

et al. 2020

ACS Sustainable Chem. Eng.

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Millions of residential and industrial solar panels installed in the late 1980s and early 1990s are approaching the end of their life, resulting in the drastic accumulation of a potential source of environmental pollutiongiven the presence of hazardous materials, such as lead. The foreseen crisis, however, can be turned into a great opportunity by value-added recovery of precious solar-grade silicon (Si) to the highly desired nanostructured silicon for lithium-ion batteries (LIBs). Herein, we demonstrate a potential end-of-life management option for photovoltaic (PV) panels, representing a step toward producing greener and more energy-efficient Si for batteries. We show that leaching the recovered silicon wafers in critically tuned alkali-acid leaching baths effectively removes the major impurities: lead (Pb), silver (Ag), and aluminum (Al). The ultrapure Si is then nanosized via industrially scalable milling routes to meet the requirements of expansion-tolerant Si anodes for LIBs delivering capacities as high as 1400 mAh g −1 .

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Section: ■ Results and Discussionmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Recovery of Nano-Structured Silicon from End-of-Life Photovoltaic Wafers with Value-Added Applications in Lithium-Ion Battery

Eshraghi

Berardo

Schrijnemakers

et al. 2020

ACS Sustainable Chem. Eng.

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“…Note that in sintering of jet-milled grey cast iron powder, 8 the maximum reported values of hardness and density for the specimens compacted under a pressure of 800 MPa and sintered at 1175 °C for 30 min were 96 BHN and 6.1 g/cm 3 , respectively. However, in this study, by mixing the jet-milled grey cast iron powder with the iron powder, the maximum values of 107 BHN and 6.5 g/cm 3 are obtained for the specimen including 61% jet-milled cast iron powder.…”

Section: Optimization and Validationmentioning

confidence: 94%

“…They showed that the powder produced by jet milling method has sharper edges along with more compressibility in comparison to the powder produced by ball milling method. In another contribution, Emadi Shaibani et al 8 sintered the jet-milled grey cast iron powders recycled from machining scraps by adding 3.5% copper powder to the cast iron powder. In this study, the charge was compacted under the pressure of 800 MPa and then sintered at 1175 °C.…”

Section: Introductionmentioning

confidence: 99%

Investigation and optimization of properties of sintered iron/recycled grey cast iron powder metallurgy parts

Abdollahi

Mahdavinejad

Leavoli

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part B:

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In this work, the preparation of iron/grey cast iron powder metallurgy parts by recycling machining scraps using target jet milling method is studied. Cast iron powder percentage, compaction pressure, sintering temperature and sintering time are selected as input process parameters. The effects of selected parameters on the response density, transverse rupture strength and hardness of the sintered samples are investigated by response surface methodology, and optimal combinations of input parameters are obtained. Analysis of variance and regression analysis are used to determine the main and interaction effects of input parameters, develop mathematical models and evaluate the validity of the models. Scanning electron microscopy and optical microscopy micrographs are provided to discuss the obtained responses. The results evidenced that the combination of iron/jet-milled grey cast iron is promising for producing powder metallurgy parts with diverse properties and economical considerations. Also, by comparing the optimized results obtained from the proposed models to that from the confirmation tests, the models errors were found to be in a range of 1%−8%.

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