Prakt. Met. Sonderband 38 (2006) 165 
phases can be clearly distinguished. In Fig. 2b the dendritic y, phase prevails. Two 
sample different grey-tones suggest two different crystallographic orientations. One for v2 on the 
samples grain boundaries (darker grey) and one for intragranular y, (lighter grey). In the inter- 
dendritic space the characteristic martensitic pattern can be observed, consisting of 
es (lISE differently oriented plates. The thin bright horizontal lines observable in Fig. 2b could be 
electron one of the FIB artefacts: The ion-current 10 pA was rather low (and consequently the 
diameter of the beam small) for FIB-etching the area of about 450 um“, Therefore, it could 
have happened that the surface was unevenly “covered” by the beam. 
with six 
n alloy 1 
ng times 
ng time. 
> to their 
t parallel 
ss have 
ions the 
veloped 
inning of 
‚1a and 
polished 
must be 
g of the Figure 2: Cross-section of an alloy 2 (Cu — 15 wt% Al — 4 wt% Ni) melt-spun ribbon; 
a) Mechanically polished; b) The same area after 1 hour FIB-etching with 10 pA. 
1anically 
1. Figure 3: The wheel-side surface of an alloy 2 melt-spun ribbon; a) In as-cast condition; b) 
After 90 minutes of FIB-etching, using ion current of 10 pA 
nd after 
3 ribbon