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(a) (b) 
: FIGS.11 - A1-20,3 wt%Th alloy. R=400mm/h. Etch:HF. a) Transverse 
section. 150 X. b) Longitudinal section. 75 X 
re SIs c - La Sa a er A 48 "ASN 78 
EEE LT a 
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5 pa AR TRE | 
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an 49 Zaidan ep Lo 
arr lata d WoC am 
, oT en DEREN ga Dat 7a 
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(a) (b) 
FIGS.12 - Al-16 wt%U alloy. R=40mm/h. a) Transverse section. 
4)Eutectic Etch:HF. 150 X. b) Selative Etch. SEM. 5002 X. 
(a) (b) 
FIGS.13 - Al-38 wt%Th alloy. R=80mm/h. a) Transverse section. 
Etch:HF. 50 X. b) Selative Etch. SEM. 150 X. 
Prakt. Met. Sonderbd. 21 (1990) 
215