| PARTICLE DISTRIBUTION IN CENTRIFUGAL ACCELERATING FIELDS |
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| 作者姓名： | Yu Sirong
Zhang Xinping
He Zhenming
Liu Yaohui
College of Materials Science
and Engineering Jilin University Changchun China |
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| 作者单位： | Yu Sirong
Zhang Xinping
He Zhenming
Liu Yaohui
College of Materials Science
and Engineering，Jilin University，Changchun 130025，China |
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| 基金项目： | This project is supported by Provincial Department of Science，Technology of Jilin. |
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| 摘 要： | Based on continuum theory and moving law of particles, a model is presented to obtain gradient distribution of particles in centrifugal accelerating field, by which the particle distribution in gradient composite material can be predicted. The simulation shows with increases in rotating time, four regions gradually appear from the internal periphery to the external one, they are free region, transition region, steady region and surface reinforced region, and the latest three regions are defined as a rich region. Finally, the steady region disappears, and the rich region only includes transition region and surface reinforced region. The influences of centrifugal acceleration coefficient G, primary volume fraction 0, pouring temperature θP and density difference between the particle and the metal matrix on particles gradient distribution are studied in detail. The results of the theoretical analysis agree with experiment ones. Both of analysis and experiment results indicate that with the increase in G a
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| 关 键 词： | 离心加速度器 质点 数值模拟 功能梯度材料 FGM |
PARTICLE DISTRIBUTION IN CENTRIFUGAL ACCELERATING FIELDS |
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| Yu Sirong
Zhang Xinping
He Zhenming
Liu Yaohui
College of Materials Science
and Engineering,Jilin University,Changchun ,China.PARTICLE DISTRIBUTION IN CENTRIFUGAL ACCELERATING FIELDS[J].Chinese Journal of Mechanical Engineering,2003,16(3):329-333. |
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| Authors: | YuSirong ZhangXinping HeZhenming LiuYaohui |
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| Affiliation: | CollegeofMaterialsScienceandEngineering,JilinUniversity,Changchun130025,China |
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| Abstract: | Based on continuum theory and moving law of particles, a model is presented to obtain gradient distribution of particles in centrifugal accelerating field, by which the particle distribution in gradient composite material can be predicted. The simulation shows with increases in rotating time, four regions gradually appear from the internal periphery to the external one, they are free region, transition region, steady region and surface reinforced region,and the latest three regions are defined as a rich region. Finally, the steady region disappears, and the rich region only includes transition region and surface reinforced region. The influences of centrifugal acceleration coefficient G,primary volume fraction (0,pouring temperature (p and density difference between the particle and the metal matrix on particles gradient distribution are studied in detail. The results of the theoretical analysis agree with experiment ones. Both of analysis and experiment results indicate that with the increase in G and (p, the particle distribution becomes more centralized and the consistence of particle in the surface periphery becomes larger. |
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| Keywords: | Centrifugal accelerating field Particles Numerical simulation Functional gradient material |
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