FRACTAL INVESTIGATION OF THE MICROSTRUCTURE IN Alnico8 THERMOMAGNETICALLY TREATED

Abstract

Abstract: Fe-Co rich particles in the Alnicos samples thermomagnetically treated fo for various times at 800℃ have been found to be of self-similarity and of fractal characteristics both in two- and three-dimension space. Fe-Co rich particles for 1. 5, 3 and 5min treatments have shown a different fractal nature both in two- and in three-dimension space compared with the case for 10min, which implies that Fe-Co rich particles evolved through fifferent rent kinetic mechanisms. The fractal dimensions for 1.5, 3, 5min as well as 10min treatments derived from the SAXS data in three-dimension space are in good agreement with the theoretical dimensions for two models introduced, respectively. The fractal dimensions in two-dimension space greater than the theoretical ones for two models can be attributed to strong anisotropy of Fe-Co rich particle evolution in three-dimension space.

Key words: Alnico8, Fe-Co rich particle, fractal dimension, kinetic mechanism

W.D. Fei; W.G. Chu and D.Z. Yang School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, China. FRACTAL INVESTIGATION OF THE MICROSTRUCTURE IN Alnico8 THERMOMAGNETICALLY TREATED[J]. Acta Metallurgica Sinica (English Letters), 2000, 13(4): 932-936.

References

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