Interfacial thermoelectric and mechanical properties of indigenously prepared Ni–Cr–Cu/Co4Sb12 skutterudite thermoelectric joints

Trivedi, Vikrant and Battabyal, Manjusha and Murty, B.S. and Gopalan, Raghavan (2022) Interfacial thermoelectric and mechanical properties of indigenously prepared Ni–Cr–Cu/Co4Sb12 skutterudite thermoelectric joints. Ceramics International. pp. 1-8. ISSN 0272-8842

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Abstract

Thermoelectric and mechanical properties of indigenously prepared Ni–Cr–Cu/Co4Sb12 skutterudite thermoelectric joints are reported. Co4Sb12 based skutterudite compounds are highly enticing mid-temperature thermoelectric materials for waste-heat harvesting. Ni–Cr–Cu electrode powder is prepared by ball milling, and a one-step sintering route is adopted to fabricate the Ni–Cr–Cu electrode/n-type Dy0.4Co3.2Ni0.8Sb12 thermoelectric joints. The processed Ni–Cr–Cu/skutterudite joint interface is continuous without having any crack and has low contact resistance (<12 μΩ cm2). The contact resistance at the interface of the joints decreases to 7 μΩ cm2 under thermal ageing at 823 K for 15 days in a vacuum. The mechanical properties of the joints are not degraded even after ageing at 823 K for 15 days. The theoretical lifetime of the skutterudite device using the Ni–Cr–Cu/Dy0.4Co3.2 Ni0.8Sb12 joints is calculated to be 11 years while maintaining the hot side temperature of the device at 773 K. Our results demonstrate that indigenously prepared Ni–Cr–Cu/Co4Sb12 thermoelectric joints can be effectively used for skutterudite module fabrication.

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IITH Creators:

IITH Creators	ORCiD
Murty, B S	https://orcid.org/0000-0002-4399-8531

Item Type:

Article

Additional Information:

The authors are thankful to Director, ARCI. VT, MB, and RG are grateful to the Department of Science and Technology, Govt. of India, for Financial support through a research grant (No. AI/1/65/ARCI/2014).

Uncontrolled Keywords:

Cu electrode; Joint interfaces; Module fabrication; Sintering routes; Skutterudite compounds; Thermo-Electric materials; Thermoelectric; Thermoelectric material; Waste heat harvesting

Subjects:

Others > Metallurgy Metallurgical Engineering
Materials Engineering > Materials engineering

Divisions:

Department of Material Science Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

16 Jul 2022 09:20

Last Modified:

16 Jul 2022 09:20

URI:

http://raiithold.iith.ac.in/id/eprint/9748