New article on inverse segregation

Finally, the project’s first article A Re-evaluation of inverse segregation in prehistoric As-Cu objects is out (others will follow soon). It’s published in the current issue of The Journal of Archaeological Science.You can get your free copy until November 1st, 2016, here. Enjoy!

Fig. 1

Inverse segregation in an experimentally chill-cast arsenical bronze with 4.4 +/- 0.2 wt.% arsenic. The feeders are clearly visible.

The study revaluates reported cases of prehistoric As-Cu objects with ‘silvery surfaces’, which are usually interpreted as the result of inverse segregation. Further possible explanations for such surfaces, such as an arsenic-rich alpha-solid solution, cementation, or post-depositional precipitation, are discussed. The segregation of arsenic was studied in As-Cu ingots produced in chill cast moulds at several compositions, which underwent surface treatment with an NaCl solution. The microstructure and surfaces of the As-Cu alloys were analysed using optical microscopy and SEM-EDXS. Special note of out-of-equilibrium As-Cu phases are discussed, as well as a comparison of inverse segregation to all other means of achieving surface silvering.

After November 1st, 2016, you can have access to the article via academia, or just send me an email.

 

 

 

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