Prakt. Met. Sonderband 38 (2006) 517 
ncreased 
cles with 4. Summary 
on of the 
This study examined influence of content variation of BaCeQO3 addition and particle size 
reduction with attrition milling on microstructure of melt-textured Y123 superconductor. 
With increasing of attrition milling time, the size of the Y123 mixed powder reduced 
effectively and the reduction of the size affects the size and distribution of the second 
phase particles. The size of the Y211 reduced with attrition milling, but the distribution of 
the second particles in the Y123 matrix becomes more non-uniform with attrition milling 
time due to the higher stress state and high agglomeration of the finer powder which may 
result in faster melt growth during process. In the case of the melt-textured Y123 samples 
with different amounts of BaCeO3 addition, the Y211 becomes smaller in size with addition 
of the BaCeOs., but further increase of the BaCeO3 content was ineffective in size 
reduction. The second particles are distributed non-uniformly in Y123 matrix with/without 
BaCeO3; addition. 
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Fig. a