Results 251 to 260 of about 529,470 (307)

Ageing of dealloyed copper

Journal of Materials Science, 1990
A finely divided copper rod structure has been prepared by the selective dissolution of aluminium from a Cu-50wt% Al alloy in aqueous NaOH. The aging behaviour of this product has been studied by measurement of the coarsening of the pore and copper rod structure.
A. D. Tomsett, D. J. Young, M. R. Stammbach, M. S. Wainwright   +3 more
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Copper comes of age in Melbourne

Metallomics, 2016
When we were asked to produce articles for this volume, it seemed appropriate to us to co-author an article on the history and impact of copper research in Melbourne. It is appropriate because over many years, decades in fact, we worked closely together and with Professor David Danks to identify the molecular defect in Menkes disease.
Julian F B, Mercer, James, Camakaris
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Long-Term Aging of Copper Added to Soils

Environmental Science & Technology, 2006
Aging refers to the processes by which the mobility and bioavailability/toxicity of metals added to soil decline with time. Although long-term aging is a key process that needs to be considered in the risk assessment of metals in field soils, the long-term aging of Cu added to soils has not been studied in detail. In this study, the effects of aging on
Ma, Y., Lombi, E., Oliver, I., Nolan, A., McLaughlin, M.   +4 more
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INFLUENCE OF AGING ON COPPER BIOAVAILABILITY IN SOILS

Environmental Toxicology and Chemistry, 2003
AbstractBecause of long-term chemical processes, metal bioavailability in field soils decreases with time. Metal toxicity may, therefore, be overestimated if toxicity data with freshly spiked soils are used to derive soil quality criteria, a current practice. In the present study, effects of the long-term processes, called aging, on copper partitioning
Koen, Lock, Colin R, Janssen
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Bronze Age Copper Smelting

Interdisciplinary Science Reviews, 1986
AbstractIn the Bronze Age, large quantities of copper were extracted by means of a complicated multistage process from the ore chalcopyrite, CuFeS2, largely mined in the Eastern Alps and the Carpathians. The methods used for ore dressing and roasting, slagging of the iron and smelting of the copper matte are now well understood; only the final ...
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Metallographic examination of Bronze Age copper

Metals Technology, 1980
AbstractOne can characterize ancient metallic finds by means of an ‘internal typology’ established through metallographic and chemical examinations as well as by means of the ‘external typology’ which is commonly used by historical scientists. For instance, the metallographic examination of a Bronze Age lance head enables identification of the ...
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Dating the Copper Age in Albania

Antiquity, 1991
Albania, set between the Adriatic, the Balkan and the Greek worlds, is placed at a south European cross-roads A first radiocarbon date from its Copper Age is the opportunity to review how the Albanian sequence relates to those its neighbours.
Jean Guilaine, Frano Prendi
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The First Materials (Stone Age and Copper—Stone Age)

2004
Materials have accompanied mankind virtually from the very beginning of his existence. Among the first materials utilized by man were certainly stone and wood, but bone, fibers, feathers, shells, animal skin, and clay also served specific purposes.
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Copper metallurgy in Iron Age Kition

Cahiers du Centre d'Etudes Chypriotes, 2016
Le site de Kition du Bronze Récent est bien connu pour sa zone sacrée et pour les ateliers métallurgiques qui ont été trouvés en association avec les temples et les téménè de Kathari. Pendant la période archaïque également, un petit atelier métallurgique a été installé à côté du grand temple d’Astarté des VIe-Ve siècles av. J.-C.
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Weldability of Copper-bearing Aging Steel

Chinese Journal of Mechanical Engineering, 2011
The weldability of copper-bearing aging steel is evaluated using calculated cracking susceptibility index Pcm,oblique Y-groove cracking test,heat-affected zone (HAZ) maximum hardness measurement,submerged arc welding (SAW) test and gas metal arc welding (GMAW) test.The results show that this copper-bearing aging steel has low hardenability and cold ...
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