Abstract: A system and method satisfies temperature and pressure requirements of solid oxide fuel cell system 10 in a manner that increases the overall efficiency and decreases the overall weight of system 10. The system and method include a secondary blower 30 for boosting air stream pressure level sufficient for operation of a reformer 12 that is designed to minimize pressure drop; an integrated heat exchanger 18 for recovering heat from exhaust 36 and comprising multiple flow fields 18A, 18B, 18C for ensuring inlet temperature requirements of a solid oxide fuel cell 14 are met; and a thermal enclosure 46 for separating hot zone 48 components from cool zone 50 components for increasing thermal efficiency of the system and better thermal management.

Abstract: An electrochemical device includes a ceramic electrode, a metallic interconnect, and a ceramic bond material that bonds the ceramic electrode and the metallic interconnect together. The ceramic material includes manganese-cobalt-oxide that is electrically conductive such that electric current can flow between the ceramic electrode and the metallic interconnect.

Abstract: An example interconnector of a fuel cell repeater unit includes a dimpled interconnector of a fuel cell repeater unit. The dimpled interconnector establishes at least a portion of an interconnector flow path operative to communicate airflow through the fuel cell repeater unit, the dimpled interconnector having a plurality of dimples.

Abstract: An example fuel cell repeater includes a separator plate and a frame establishing at least a portion of a flow path that is operative to communicate fuel to or from at least one fuel cell held by the frame relative to the separator plate. The flow path has a perimeter and any fuel within the perimeter flow across the at least one fuel cell in a first direction. The separator plate, the frame, or both establish at least one conduit positioned outside the flow path perimeter. The conduit is outside of the flow path perimeter and is configured to direct flow in a second, different direction. The conduit is fluidly coupled with the flow path.

Abstract: An example fuel cell stack component includes a metallic layer applied to the component and an oxide layer applied to the metallic layer. The oxide layer includes a chemical component that is not in the metallic layer.

Abstract: An electrochemical device includes a ceramic electrode, a metallic interconnect, and a ceramic bond material that bonds the ceramic electrode and the metallic interconnect together. The ceramic material includes manganese-cobalt-oxide that is electrically conductive such that electric current can flow between the ceramic electrode and the metallic interconnect.

Abstract: A system and method satisfies temperature and pressure requirements of solid oxide fuel cell system 10 in a manner that increases the overall efficiency and decreases the overall weight of system 10. The system and method include a secondary blower 30 for boosting air stream pressure level sufficient for operation of a reformer 12 that is designed to minimize pressure drop; an integrated heat exchanger 18 for recovering heat from exhaust 36 and comprising multiple flow fields 18A, 18B, 18C for ensuring inlet temperature requirements of a solid oxide fuel cell 14 are met; and a thermal enclosure 46 for separating hot zone 48 components from cool zone 50 components for increasing thermal efficiency of the system and better thermal management.

Abstract: An example fuel cell repeater includes a separator plate and a frame establishing at least a portion of a flow path that is operative to communicate fuel to or from at least one fuel cell held by the frame relative to the separator plate. The flow path has a perimeter and any fuel within the perimeter flow across the at least one fuel cell in a first direction. The separator plate, the frame, or both establish at least one conduit positioned outside the flow path perimeter. The conduit is outside of the flow path perimeter and is configured to direct flow in a second, different direction. The conduit is fluidly coupled with the flow path.

Abstract: An example fuel cell repeater includes a separator plate and a frame establishing at least a portion of a flow path that is operative to communicate fuel to or from at least one fuel cell held by the frame relative to the separator plate. The flow path has a perimeter and any fuel within the perimeter flow across the at least one fuel cell in a first direction. The separator plate, the frame, or both establish at least one conduit positioned outside the flow path perimeter. The conduit is outside of the flow path perimeter and is configured to direct flow in a second, different direction. The conduit is fluidly coupled with the flow path.

Abstract: A process for preparing a silicon based substrate with a protective coating having improved thermal resistance at temperature up to at least 1500° C., and the resulting article.

Abstract: An article comprises a silicon based substrate, a bond layer and a protective top layer. The top layer is selected from the group consisting of rare earth disilicates, yttrium disilicates, rare earth monosilicates, yttrium monosilicates, silica and mixtures thereof. The protective layer described above is used in combination with a bond layer provided between the protective layer and the silicon based substrate which functions as oxygen getter and includes an oxygen gettering agent. By oxygen gettering agent is meant a refractory metal oxide former which forms an oxide at operational condition of (high temperature and aqueous environment) having a melting point of greater than 1500° C. wherein the negative free energy of formation of the refractory metal oxide from the refractory metal is more than 100 Kcal/mole. Suitable oxygen gettering agents include silicon and other refractory metals. An oxygen gettering agent may also be added to the protective layer.

Abstract: A bond layer for use on a silicon based substrate. The bond layer comprises an alloy comprising a refractory metal disilicide/silicon eutectic. The refractory metal disilicide is selected from the group consisting of disilicides of molybdenum, chromium, hafnium, niobium, tantalum, rhenium, titanium, tungsten, uranium, vanadium, yttrium and mixtures thereof. The refractory metal disilicide/silicon eutectic has a melting point of greater than 1300° C.

Abstract: A bond layer for a silicon based substrate comprises a mixture of a first phase and a second phase, wherein the first phase is selected from the group consisting of refractory metal oxides, refractory metal silicates and mixtures thereof and the second phase is selected from the group consisting of refractory metal oxide forming metals, SiC, Si3N4, and mixtures thereof.

Abstract: A bond layer for a silicon based substrate comprises a refractory oxide forming metal having a thickness of between about 0.1 to 20 micron. The refractory oxide forming metal comprise chromium, tantalum, niobium, silicon, platinum, hafnium, yttrium, aluminum, zirconium, titanium, rare earth metals, alkaline earth metals and mixtures thereof.

Abstract: A bond layer for a silicon based substrate comprises a mixture of a first phase and a second phase, wherein the first phase is selected from the group consisting of refractory metal oxides, refractory metal silicates and mixtures thereof and the second phase is selected from the group consisting of refractory metal oxide forming metals, SiC, Si3N4, and mixtures thereof.

Abstract: A bond layer for use on a silicon based substrate. The bond layer comprises an alloy comprising a refractory metal disilicide/silicon eutectic. The refractory metal disilicide is selected from the group consisting of disilicides of molybdenum, chromium, hafnium, niobium, tantalum, rhenium, titanium, tungsten, uranium, vanadium, yttrium and mixtures thereof. The refractory metal disilicide/silicon eutectic has a melting point of greater than 1300° C.

Abstract: An article comprising a substrate containing silicon and at least one layer which contains a coefficient of thermal expansion (CTE) tailoring additive in an amount sufficient to maintain a compatible CTE with at least one adjacent layer and the substrate.

Abstract: An article comprising a substrate containing silicon and at least one barrier layer which functions as a thermal barrier at temperatures in excess of 1300° C. in aqueous environments.

Abstract: An article comprising a substrate containing silicon and at least one barrier layer which functions as a thermal barrier at temperatures in excess of 1300° C. in aqueous environments.

Abstract: An article comprising a substrate containing silicon and at least one layer which contains a coefficient of thermal expansion (CTE) tailoring additive in an amount sufficient to maintain a compatible CTE with at least one adjacent layer and the substrate.