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Materials 2014, 7(9), 6304-6316; doi:10.3390/ma7096304

Upgrade Recycling of Cast Iron Scrap Chips towards β-FeSi2 Thermoelectric Materials

1
Graduate School of Engineering, Nagaoka University of Technology, Kamitomioka, Nagaoka, Niigata 940-2188, Japan
2
Department of Manufacturing and Materials Engineering, Kuliyyah of Engineering, International Islamic University, Kuala Lumpur 50728, Malaysia
3
Department of Mechanical Engineering, Nagaoka University of Technology, Kamitomioka, Nagaoka, Niigata 940-2188, Japan
*
Author to whom correspondence should be addressed.
Received: 13 June 2014 / Revised: 26 August 2014 / Accepted: 1 September 2014 / Published: 4 September 2014
(This article belongs to the Special Issue Recycled Materials)
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Abstract

The upgrade recycling of cast-iron scrap chips towards β-FeSi2 thermoelectric materials is proposed as an eco-friendly and cost-effective production process. By using scrap waste from the machining process of cast-iron components, the material cost to fabricate β-FeSi2 is reduced and the industrial waste is recycled. In this study, β-FeSi2 specimens obtained from cast iron scrap chips were prepared both in the undoped form and doped with Al and Co elements. The maximum figure of merit (ZT) indicated a thermoelectric performance of approximately 70% in p-type samples and nearly 90% in n-type samples compared to β-FeSi2 prepared from pure Fe and other published studies. The use of cast iron scrap chips to produce β-FeSi2 shows promise as an eco-friendly and cost-effective production process for thermoelectric materials. View Full-Text
Keywords: materials recycling; cast iron scrap chips; thermoelectric performance; β-FeSi2 materials recycling; cast iron scrap chips; thermoelectric performance; β-FeSi2
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Laila, A.; Nanko, M.; Takeda, M. Upgrade Recycling of Cast Iron Scrap Chips towards β-FeSi2 Thermoelectric Materials. Materials 2014, 7, 6304-6316.

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