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Acta Metall Sin  2010, Vol. 46 Issue (2): 129-134    DOI: 10.3724/SP.J.1037.2009.00527
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THEORETICAL ANALYSIS ON EFFECT OF TRANSFERENCE VELOCITY ON STRUCTURE OF POROUS METALS FABRICATED BY CONTINUOUS CASTING GASAR PROCESS
LIU Yuan1; LI Yanxiang1; LIU Runfa1;ZHOU Rong2; JIANG Yehua2; LI Zhenhua2
1.Key Laboratory for Advanced Materials Processing Technology; Ministry of Education; Department of Mechanical Engineering; Tsinghua University; Beijing 100084
2.Faculty of Mechanical and Electrical Engineering; Kunming University of Science and Technology; Kunming 650093
Cite this article: 

LIU Yuan LI Yanxiang LIU Runfa ZHOU Rong JIANG Yehua LI Zhenhua. THEORETICAL ANALYSIS ON EFFECT OF TRANSFERENCE VELOCITY ON STRUCTURE OF POROUS METALS FABRICATED BY CONTINUOUS CASTING GASAR PROCESS. Acta Metall Sin, 2010, 46(2): 129-134.

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Abstract  

Transference velocity is an important processing parameter to influence the final lotus–type porous structure fabricaed by continuus casting Gasar process. Via solving the solute diffusion equation, a theoretical model was developed to predict the effect of the transference velocity on the porosity, the pore diameter and the inter–pore spacing. The predicted values at different transference velocities have a good agreement with the corresponding experimental results obtained by Japanese esearcher. The average pore diameter and the inter–pore spacing L both have a prominent decrease with the increase of transference velocity v, but the porosity only has a slight decrease. The theoretical relationships between the pore radius rg, the inter–pore spacing and the transference velocity can be described by the two simple equations as r1.72g ·v = A and L1.72 ·v = B, where A and B are all constants depending on the used gas presures and the melt temperature.

Key words:  porous metal      metal–gas eutectic      continuucasting      transference velocity     
Received:  31 July 2009     
Fund: 

Supported by National Natural Science Foundation of China and Yunnan Provincial Government (No.u0837603), Natural Science Foundation of Beijing (No.2092017), Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry (No.20091020471) and Key Talents Foundation of Tsinghua University

URL: 

https://www.ams.org.cn/EN/10.3724/SP.J.1037.2009.00527     OR     https://www.ams.org.cn/EN/Y2010/V46/I2/129

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