Interfacial reactions in the Ni/(Bi 0.25 Sb 0.75 ) 2 Te 3 and Ni/Bi 2 (Te 0.9 Se 0.1 ) 3 couples

Chen, Sinn-wen; Yang, T.Y.; Wu, Chih‐Yu; Hsiao, Haw-Wen; Chu, Hsu-Shen; Huang, Jenn-dong; Liou, Tz-wen

doi:10.1016/j.jallcom.2016.06.207

Cited by 26 publications

(12 citation statements)

References 46 publications

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“…The two above-mentioned effects are possibly responsible for the formation of Ni:Bi 2 Se 3 (ref. [37][38][39] and FeSe compounds 40,41 as considering the XANES results. The inset of Fig.…”

Section: Resultsmentioning

confidence: 99%

Heterostructured ferromagnet–topological insulator with dual-phase magnetic properties

et al. 2018

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“…The two above-mentioned effects are possibly responsible for the formation of Ni:Bi 2 Se 3 (ref. [37][38][39] and FeSe compounds 40,41 as considering the XANES results. The inset of Fig.…”

Section: Resultsmentioning

confidence: 99%

Heterostructured ferromagnet–topological insulator with dual-phase magnetic properties

et al. 2018

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“…Thermoelectrics and Their Applications -2021" (ISCTA 2021) by a number of authors [6,11,41,45]. In this regard, it is not recommended to use, for example, nickel contacts in thermoelements at temperatures above 500 K. The possibility of the formation of a transition layer of Ni compounds in the contact region and its increase with temperature are confirmed experimentally by the data of Auger spectroscopy of films with a thickness of 400 nm formed on TE material (Fig.…”

Section: Interstate Conference "mentioning

confidence: 99%

XVII Interstate Conference Thermoelectrics and Their Applications --- 2021" (ISCTA 2021 St. Petersburg, September 13-16, 2021 Obtaining and investigation of ohmic contacts with high adhesion to thermoelements

et al. 2022

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The factors determining the adhesive strength of film coatings are considered. The functions of contacts in thermoelements used in a wide temperature range were determined. It was established that the adhesive strength of contact is a limiting factor in the mechanical strength of a thermoelement. A method of vacuum sputtering of thin-film contacts was proposed, including the surface treatment of samples of thermoelectric materials. The presence of a transition layer in the area of the metal-thermoelectric material contact, formed during the interaction of the metal with elements of the thermoelectric material, was established. The dependence of the adhesive strength of film contact on roughness of surface on which they formed was established. Thermal stable contacts for thermoelements with low resistivity of the order of 10-9 Ω·m2 and high adhesion strength of at least 12 MPa were obtained by ion-plasma sputtering. Keywords: thermoelements, contacts, thin films, adhesion, contact resistance.

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“…Different Ni−Te alloys including Ni 3 Te 2 , NiTe, and NiTe 2 have been found at Ni/Bi 2 Te 3 joints in other works. 22 Ma et al 36 reported a change of the interfacial phase from NiTe to NiTe 2 by increasing the sintering temperature in Ni/Bi 2 Te 3 nanocomposites prepared by spark plasma sintering method. Mu et al 37 reported the heat treatment of Te thin films deposited on Ni substrates.…”

Section: Experimental Section and Measurementsmentioning

confidence: 99%

“…The most commonly used barrier layer in Bi 2 Te 3 -based TE devices is Ni metal. Ni has several advantages including good electrical conductivity and thermal conductivity, good wettability to the Sn-based solder, small CTE difference to Bi 2 Te 3 , good blocking effect, and low cost and high efficiency in preparation. − As a barrier layer, Ni not only provides a strong interfacial bonding strength with TE legs but also forms Ni/Bi 2 Te 3 joints with low interfacial contact resistance. However, since Ni is prone to reaction with Te at high temperature, the devices become very unstable, which leads to significant performance deterioration and even device failure.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Contact Performance and Thermal Tolerance of Ni/Bi₂Te₃ Joints for Bi₂Te₃-Based Thermoelectric Devices

Zhang

Wei

Zhang

et al. 2023

ACS Appl. Mater. Interfaces

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Ni metal has been widely used as a barrier layer in Bi2Te3-based thermoelectric devices, which establishes stable joints to link Bi2Te3-based legs and electrodes. However, the Ni/Bi2Te3 joints become very fragile when the devices were exposed to high temperature, causing severe performance deterioration and even device failure. Herein, stable Ni/Bi2Te3 joints have been established by arc spraying of the Ni barrier layer on the Bi2Te3-based alloys. The interface microstructure and contact performance including the bonding strength and contact resistivity of the arc-sprayed Ni/Bi2Te3 joints are investigated. The results indicate that, as compared with traditional Ni/Bi2Te3 joints, the arc-sprayed Ni/Bi2Te3 joints have comparably low contact resistivity while possessing a 50% higher bonding strength. Aging the joints as an exposure to high-temperature circumstances, the arc-sprayed Ni/Bi2Te3 joints exhibit much better tolerance to the thermal shock with stable bonding strength and contact resistivity. The enhanced interfacial contact performance and thermal tolerance should be attributed to the thick Ni barrier layer and interface reaction layer with good Ohmic contact. This work provides an effective strategy to establish stable joints for the Bi2Te3-based thermoelectric devices with improved thermal stability.

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Interfacial reactions in the Ni/(Bi 0.25 Sb 0.75 ) 2 Te 3 and Ni/Bi 2 (Te 0.9 Se 0.1 ) 3 couples

Cited by 26 publications

References 46 publications

Heterostructured ferromagnet–topological insulator with dual-phase magnetic properties

Heterostructured ferromagnet–topological insulator with dual-phase magnetic properties

XVII Interstate Conference Thermoelectrics and Their Applications --- 2021" (ISCTA 2021 St. Petersburg, September 13-16, 2021 Obtaining and investigation of ohmic contacts with high adhesion to thermoelements

Enhanced Contact Performance and Thermal Tolerance of Ni/Bi₂Te₃ Joints for Bi₂Te₃-Based Thermoelectric Devices

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Interfacial reactions in the Ni/(Bi 0.25 Sb 0.75 ) 2 Te 3 and Ni/Bi 2 (Te 0.9 Se 0.1 ) 3 couples

Cited by 26 publications

References 46 publications

Heterostructured ferromagnet–topological insulator with dual-phase magnetic properties

Heterostructured ferromagnet–topological insulator with dual-phase magnetic properties

XVII Interstate Conference Thermoelectrics and Their Applications --- 2021&quot; (ISCTA 2021 St. Petersburg, September 13-16, 2021 Obtaining and investigation of ohmic contacts with high adhesion to thermoelements

Enhanced Contact Performance and Thermal Tolerance of Ni/Bi2Te3 Joints for Bi2Te3-Based Thermoelectric Devices

Contact Info

Product

Resources

About

XVII Interstate Conference Thermoelectrics and Their Applications --- 2021" (ISCTA 2021 St. Petersburg, September 13-16, 2021 Obtaining and investigation of ohmic contacts with high adhesion to thermoelements

Enhanced Contact Performance and Thermal Tolerance of Ni/Bi₂Te₃ Joints for Bi₂Te₃-Based Thermoelectric Devices