Investigation on the Switching Behavior of AgSnO&amp;lt;inf&amp;gt;2&amp;lt;/inf&amp;gt;Materials in Commercial Contactors

Gengenbach, B.; Mayer, Udo; Michal, R.; Saeger, K.E.

doi:10.1109/tchmt.1985.1136491

Cited by 21 publications

(3 citation statements)

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“…It is more appropriate for assessing the interface wettability, as performed in sessile-drop wetting tests [36,37]. A low wettability between oxides and Ag may induce strong aggregation of oxide particles in the molten region of the Ag matrix during its service, leading to an irreversible increase of contact resistance and hence severe performance degradation of the composite [19][20][21]. Thus, interface fracture strength and wettability are both critical for the performance of the composites, and must be evaluated appropriately.…”

Section: Relaxed Interface Structure and Adhesion Propertymentioning

confidence: 99%

“…This strategy is demonstrated for a technologically important Ag(SnO 2 ) p composite developed by internal oxidation process. The Ag(SnO 2 ) p composite is among the most promising materials for electrical contact applications, due to its high level of chemical stability, erosion and welding resistance, and as well better environmental compatibility than Ag(CdO) p [19][20][21][22]. Although some efforts [23][24][25] have been recently made to alloying the composite with third-party elements (such as indium) for enhanced electrical contact performance, the in situ formation of the internal Ag/SnO 2 interface and its intrinsic properties have never been investigated.…”

Section: Introductionmentioning

confidence: 99%

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Interface-level thermodynamic stability diagram for in situ internal oxidation of Ag(SnO2)p composites

Jiang

et al. 2014

J Mater Sci

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We present a combined experimental and theoretical study on interfacial structure and thermodynamics in internally oxidized Ag(SnO 2 ) p composites. The orientation relation between in situ formed SnO 2 particles and the silver matrix was characterized using high-resolution transmission electron microscopy techniques. First-principles energetic calculations were then performed to predict the equilibrium interface structures and corresponding adhesion properties as functions of temperature and oxygen partial pressure. All results were combined to construct the interface-level thermodynamic stability diagram, for guiding the optimal design of internal oxidation parameters.

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Section: Relaxed Interface Structure and Adhesion Propertymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Interface-level thermodynamic stability diagram for in situ internal oxidation of Ag(SnO2)p composites

Jiang

et al. 2014

J Mater Sci

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“…Several similar composites, such as silver–zinc oxide (Ag–ZnO), silver–nickel oxide (Ag–NiO), and silver–tin oxide (Ag–SnO 2 ), have been considered since the restriction of Ag–CdO and have been shown to constitute suitable alternatives to this material. Among these, Ag–SnO 2 is the most promising substance, because it exhibits excellent resistance under a high‐induced current; moreover, it has attractive material fusion characteristics, despite that fact that its contact resistance is lower than that of Ag–CdO …”

Section: Introductionmentioning

confidence: 99%

Fabrication of Ag–SnO₂ Contact Materials from Gas‐Atomized Ag–Sn Powder Using Combined Oxidation and Ball‐Milling Process

Choi

Ali

Kim

et al. 2015

Int J Applied Ceramic Tech

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Silver-tin oxide (Ag-SnO 2 ) is considered to be an effective alternative to silver-cadmium oxide (Ag-CdO), which is carcinogenic and, therefore, toxic to the human body. In this study, Ag-SnO 2 powder was prepared through a combined oxidation and ball-milling process using gas-atomized Ag-Sn powder. During oxidation, the Ag 3 Sn phase disappeared at 800°C and SnO 2 was formed without Ag oxidation; this SnO 2 formed a layer structure that covered the Ag matrix. The thickness of the oxide layer increased after the composite was subjected to a second oxidation process. Owing to the resultant core (Ag)-shell (SnO 2 ) structure, the electrical conductivity of the fabricated composite was considerably lower than that of commercially available materials. However, the electrical conductivity increased remarkably after ball milling of the samples, which allowed the SnO 2 surface layer to be peeled off and crushed. Following high-pressure magnetic pulsed compaction, the SnO 2 was found to be homogeneously distributed in the Ag matrix, which exhibited a lamellar structure.

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Processing copper and silver matrix composites by electroless plating and hot pressing

Chang

Lin

et al. 1999

Metall Mater Trans A

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A simple process was developed to fabricate ceramic-reinforced copper and silver matrix composites by electroless plating and hot pressing at 873 K and 300 MPa, in air. Composites were produced containing 10 to 40 vol pct ceramic reinforcements of different sizes and shapes including silicon carbide whiskers (SiC w ), alumina particles (Al 2 O 3p ), carbon short fibers (Carbon sf ), and Saffil short fibers (Saffil sf ) (3.8 pct SiO 2 -96.2 pct Al 2 O 3 ) uniformly distributed within the matrix. The hardness and bending strength of the composites were much higher than those of the pure matrices. The electrical conductivity, measured by a four-point probe method, was similar to that of traditional CdO/ Ag electrical contact materials. The surface morphologies and cross-sectional microstructures of the arc-eroded Al 2 O 3p /Ag composites were similar to those of conventional CdO/Ag and SnO 2 /Ag and exhibited a good arc-erosion resistance. These composites combine the high strength and elevatedtemperature stability of the ceramic reinforcements with the good electrical and thermal conductivity of the two metallic matrices.

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Investigation on the Switching Behavior of AgSnO<inf>2</inf>Materials in Commercial Contactors

Cited by 21 publications

References 1 publication

Interface-level thermodynamic stability diagram for in situ internal oxidation of Ag(SnO2)p composites

Interface-level thermodynamic stability diagram for in situ internal oxidation of Ag(SnO2)p composites

Fabrication of Ag–SnO₂ Contact Materials from Gas‐Atomized Ag–Sn Powder Using Combined Oxidation and Ball‐Milling Process

Processing copper and silver matrix composites by electroless plating and hot pressing

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Investigation on the Switching Behavior of AgSnO&lt;inf&gt;2&lt;/inf&gt;Materials in Commercial Contactors

Cited by 21 publications

References 1 publication

Interface-level thermodynamic stability diagram for in situ internal oxidation of Ag(SnO2)p composites

Interface-level thermodynamic stability diagram for in situ internal oxidation of Ag(SnO2)p composites

Fabrication of Ag–SnO2 Contact Materials from Gas‐Atomized Ag–Sn Powder Using Combined Oxidation and Ball‐Milling Process

Processing copper and silver matrix composites by electroless plating and hot pressing

Contact Info

Product

Resources

About

Investigation on the Switching Behavior of AgSnO<inf>2</inf>Materials in Commercial Contactors

Fabrication of Ag–SnO₂ Contact Materials from Gas‐Atomized Ag–Sn Powder Using Combined Oxidation and Ball‐Milling Process