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macrosegregation
macrosegregation n.
Brit. 
/ˌmakrə(ʊ)sɛɡrᵻˈɡeɪʃn/
, /ˌmakrə(ʊ)sɛɡrᵻˈɡeɪʃn/U.S. /ˌmækroʊˌsɛɡrəˈɡeɪʃ(ə)n/
Metallurgy large-scale variation in the composition of a casting or ingot caused by the gradual separation (esp. from the surface to the centre) of the different constituents of the molten alloy as it solidifies./ˌmækroʊˌsɛɡrəˈɡeɪʃ(ə)n/ΚΠ
1967 Trans. Metall. Soc. AIME 239 1449/2 Macrosegregation is often influenced by..thermal changes.
1978 Nature 16 Nov. 209/2 This technique of making final products has the advantages that macrosegregation is entirely eliminated, large amounts of solute can be held in metastable equilibrium which makes possible new levels of precipitation-hardening, and the consolidated product can have very fine grain sizes.
1994 Proc. Internat. Conf. Thermoelectr. 12 49 (heading) Investigation of macrosegregation of tellurium in..BiSbTe3 crystals.
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