Y.H. Xia 1)
,
T.P. Lou 1)
,
Z.T. Sui 1) and B. Li 2) 1) School of Material & Metallurgy
,
Northeastern University
,
Shenyang 110006
,
China 2) Jiamusi University
,
Jiamusi 154007
,
China
金属学报(英文版)
The fractal and spinodal decomposition models combined Monte Carlo method were used in computer simulation of phase separation from CaO MgO Fe 2O 3 Al 2O 3 SiO 2 glass. The fractal dimension was applied to quantitative analysis. The mechanism of phase separation was investigated. The results showed that the fractal dimensions and simulated micrographs of phase separation were in good agreement with the experimental results. And the mechanism of phase separation was spinodal decomposition.
关键词:
glass
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null
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null
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null
,
null
,
null
,
null
W.D. Fei
,
W.G. Chu and D.Z. Yang School of Material Science and Engineering
,
Harbin Institute of Technology
,
Harbin 150001
,
China
金属学报(英文版)
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.
关键词:
Alnico8
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null
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null
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null
LI MeiyaShantou University
,
Shantou
,
Guangdong
,
ChinaCOWLAMNUniversity of Sheffield
,
Sheffield S3 7RH
,
UKCOCCOGUniversita di Sassari
,
via Vienna 2
,
07100 Sassari
,
Italy Manuscript received 10 May
,
1994
金属学报(英文版)
Small angle neutron scattering(SANS) technique has been used to investigate the Ni_(50)Mo_(50) system prepared by mechanical alloying(MA). Significant changes of the scattering intensity have been observed among the samples with different milling time.Interesting fractal-like behavior of the sample system have been found and attempts have been made to determine the fractal dimensions. It is expected that the fractal dimension can be related to the different stages of MA to some extent.
关键词:
mechanical alloying
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null
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null
