Replacement of AgCdO by AgSnO/sub 2/ in DC contactors

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

“…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.…”

“…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.…”

Preparation and arc erosion properties of Ag/Ti2SnC composites under electric arc discharging

“…12. The dark areas (1,2,3,5,6) and the bright areas (4,7,8) were observed on the surface of the Ag/10TSC contact ( Fig. 12(a)) and the Ag/20TSC (Fig.…”

“…With excellent electrical contacting properties, Ag/ CdO has been utilized by various industries since the beginning of the last century [2]. However, the toxic Cd vapor produced in use endangers the human health and the natural environment, and considerable efforts have been made to find substitute material for Ag/CdO [3]. Some non-toxic contact materials, e.g., Ag/Ni, Ag/SnO 2 , Ag/ZnO [1], Ag/TiB 2 [4], Ag/Al 2 O 3 , Ag/SiC [5], etc., have been studied and developed.…”

“…Ti 2 SnC is another member of the MAX phase family, which was first discovered by Jeitschko et al [8]. Ti 2 SnC is lightweight (6.1 g/cm 3 ), relatively soft (~3.5 GPa), elastically stiff (~228 GPa in Young's modulus), easily machinable, and a good heat conductor (43 W/(m•K)). It also exhibits a set of superior properties, including high temperature stability, high damage tolerance, superior corrosion resistance, good oxidation resistance, and high thermal shock resistance [9][10][11].…”