Abstract: Thermal transfer coating comprising a plurality of metal bodies and a plurality of interstitial elements disposed between and connecting the plurality of metal bodies to one another. The metal bodies comprise an inner portion comprising a first metal and an outer portion comprising an alloy comprising the first metal and a second metal. The interstitial elements comprise the alloy of the outer portion.

Abstract: Structured thermal transfer article comprising a plurality of metal bodies and a plurality of interstitial elements disposed between and connecting the plurality of metal bodies to one another. The metal bodies comprise an inner portion comprising a first metal and an outer portion comprising an alloy comprising the first metal and a second metal. The interstitial elements comprise the alloy of the outer portion.

Abstract: A device for cooling a heat-dissipating component comprising an expansion chamber that is expandable between a first volume and a second volume. The expansion chamber adjusts its surface exposure to ambient air according to the operating conditions of the device.

Abstract: A device for cooling a heat-dissipating component comprising a body having at least one sidewall, an enclosed volume, an expansion volume, a quantity of heat transfer fluid disposed within the enclosed volume, and means for releasing the heat transfer fluid from the enclosed volume to the expansion volume. Upon release into the expansion volume, the heat transfer fluid can contact the heat-dissipating device.

Abstract: A cooling apparatus for a fuel cell assembly includes a heat transfer fluid and at least one fluid flow field plate configured to facilitate essentially passive, two-phase cooling for an membrane electrode assembly (MEA) as the MEA is subject to changes in heat flux to the heat transfer fluid from about 0 W/cm2 to about 1.5 W/cm2. The flow field plate includes fluid flow channels that have a channel depth, a channel spacing, a channel length, and a channel width, which are dimensioned to promote nucleated boiling of the heat transfer fluid below a critical heat flux and to prevent dryout as the heat transfer fluid passes along the length of the channels. The channels may include coatings and/or features, such as microporous or nanostructured coatings, that extend the critical heat flux and preclude dryout at the distal sections of the fluid flow channels.