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- Ca_composite abstract "Al/Ca composite is a high-conductivity, high-strength, lightweight composite consisting of sub-micron-diameter pure calcium metal filaments embedded inside a pure aluminium metal matrix. The material is still in the development phase, but it has potential use as an overhead high-voltage power transmission conductor. It could also be used wherever an exceptionally light, high-strength conductor is needed. Its physical properties make it especially well-suited for DC transmission. Compared with conventional conductors such as aluminium-conductor steel-reinforced cable (ACSR), all aluminium alloy conductors (AAAC), aluminium conductor alloy reinforced (ACAR), aluminium conductor composite reinforced ACCR and ACCC conductor that conduct AC current well and DC current somewhat less well (due to the skin effect), Al/Ca conductor is essentially a single uniform material with high DC conductivity, allowing the core strands and the outer strands of a conductor cable to all be the same wire type. This conductor is inherently strong so that there is no need for a strong (usually poorly conductive) core to support its own weight as is done in conventional conductors. This eliminates the \"bird caging\", spooling, and thermal fatigue problems caused by thermal expansion coefficient mismatch between the core and outer strands. The Al-Ca phase interfaces strengthen the composite substantially, but do not have a noticeable effect on restricting the mean free path of electrons, which gives the composite both high strength and high conductivity, a combination that is normally difficult to achieve with both pure metals and alloys. The high strength and light weight could reduce the number of towers needed per kilometer for long distance transmission lines. Since towers and their foundations often account for 50% of a powerline's construction cost, building fewer towers would save a substantial fraction of total construction costs. The high strength also could increase transmission reliability in wind/ice loading situations. The high conductivity has the potential to reduce Ohmic losses.Al/Ca composite conductor was invented by Russell and Anderson at Ames Laboratory of the U.S. Department of Energy with the goal of developing the next generation power transmission cables. Al/Ca composite is produced by powder metallurgy and severe deformation processing (extrusion, swaging, wire drawing). This process would be roughly two to three times more expensive than conventional melt processing for ACSR. But the cost saving on tower construction is projected to be substantially larger than the extra cost of the conducting cables. During deformation processing, the Ca powder particles deform into filaments surrounded by the Al matrix, which avoids exposing calcium, a reactive element, to air and moisture. The corrosion resistance of this composite has been found to be similar to that of pure aluminium.Al/Ca composite has good microstructural stability even above 300 Celsius. The formation of intermetallic compounds at the interface would stabilize the microstructure to avoid the degradation of its various properties during exposure to elevated temperatures, such as those encountered during emergency overload situations.".
- Ca_composite wikiPageID "42978555".
- Ca_composite wikiPageLength "4634".
- Ca_composite wikiPageOutDegree "32".
- Ca_composite wikiPageRevisionID "635804292".
- Ca_composite wikiPageWikiLink ACCC_conductor.
- Ca_composite wikiPageWikiLink ACCR.
- Ca_composite wikiPageWikiLink All_aluminium_alloy_conductors.
- Ca_composite wikiPageWikiLink Alternating_current.
- Ca_composite wikiPageWikiLink Aluminium.
- Ca_composite wikiPageWikiLink Aluminium-conductor_steel-reinforced_cable.
- Ca_composite wikiPageWikiLink Aluminium_conductor_alloy_reinforced.
- Ca_composite wikiPageWikiLink Aluminium_conductor_composite_reinforced.
- Ca_composite wikiPageWikiLink Ames_Laboratory.
- Ca_composite wikiPageWikiLink Calcium.
- Ca_composite wikiPageWikiLink Category:Aluminium_alloys.
- Ca_composite wikiPageWikiLink Category:Calcium.
- Ca_composite wikiPageWikiLink Composite_material.
- Ca_composite wikiPageWikiLink Corrosion.
- Ca_composite wikiPageWikiLink DC_transmission.
- Ca_composite wikiPageWikiLink Electrical_conductor.
- Ca_composite wikiPageWikiLink Extrusion.
- Ca_composite wikiPageWikiLink Fatigue_(material).
- Ca_composite wikiPageWikiLink Intermetallic.
- Ca_composite wikiPageWikiLink Joule_heating.
- Ca_composite wikiPageWikiLink Mean_free_path.
- Ca_composite wikiPageWikiLink Metal_filament.
- Ca_composite wikiPageWikiLink Microstructure.
- Ca_composite wikiPageWikiLink Overhead_power_line.
- Ca_composite wikiPageWikiLink Powder_metallurgy.
- Ca_composite wikiPageWikiLink Skin_effect.
- Ca_composite wikiPageWikiLink Spooling.
- Ca_composite wikiPageWikiLink Swaging.
- Ca_composite wikiPageWikiLink Thermal_expansion.
- Ca_composite wikiPageWikiLink Transmission_tower.
- Ca_composite wikiPageWikiLink United_States_Department_of_Energy.
- Ca_composite wikiPageWikiLink Wire_drawing.
- Ca_composite wikiPageWikiLinkText "Al/Ca composite".
- Ca_composite wikiPageUsesTemplate Template:Orphan.
- Ca_composite wikiPageUsesTemplate Template:Reflist.
- Ca_composite subject Category:Aluminium_alloys.
- Ca_composite subject Category:Calcium.
- Ca_composite comment "Al/Ca composite is a high-conductivity, high-strength, lightweight composite consisting of sub-micron-diameter pure calcium metal filaments embedded inside a pure aluminium metal matrix. The material is still in the development phase, but it has potential use as an overhead high-voltage power transmission conductor. It could also be used wherever an exceptionally light, high-strength conductor is needed. Its physical properties make it especially well-suited for DC transmission.".
- Ca_composite label "Al/Ca composite".
- Ca_composite sameAs Q18205189.
- Ca_composite sameAs m.011q4k_l.
- Ca_composite sameAs Q18205189.
- Ca_composite wasDerivedFrom Ca_composite?oldid=635804292.
- Ca_composite isPrimaryTopicOf Ca_composite.