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	Effect of melt convection on bidirectional solidification of Mg-H eutectic
	Wang Xue ; Li Yanxiang ; Liu Yuan
	2010-10-12 ; 2010-10-12
关键词	Experimental/ bubbles convection directional solidification gas mixtures magnesium porous materials/ melt convection metal-gas eutectic bidirectional solidification process high-pressure hydrogen gas mixture porous material gas bubble gas pore distribution casting mould transverse convection radial-type porous magnesium Mg-H/ A8130F Solidification A6470D Solid-liquid transitions A6140G Structure of powders and porous materials/ MgH/bin Mg/bin H/bin
中文摘要	By use of the bidirectional solidification process of metal/gas eutectic at an atmosphere of high-pressure hydrogen or gas mixture of hydrogen and argon, a special type of porous material-porous metal with radial pore distribution can be fabricated. During the solidification of metal/gas eutectic, the evolution of gas pores makes the volume of the solidifying metal expand, which leads to severe melt convection in front of the solidification interface in the bidirectional solidification process. The experimental results of Mg-H system show that during the solidification, the transverse convection in front of the solidifying interface will affect the growth direction of the gas pores, promote gas bubble escaping, and degrade the uniformity of gas pore distribution. By properly designing the structure of the casting mould and choosing appropriate processing parameters, the above harmful transverse convection can be depressed or limited to a lower level, and high quality radial-type porous magnesium with uniform pore distribution can be obtained.
语种	中文
出版者	Science Press ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/80508]
专题	清华大学
推荐引用方式 GB/T 7714	Wang Xue,Li Yanxiang,Liu Yuan. Effect of melt convection on bidirectional solidification of Mg-H eutectic[J],2010, 2010.
APA	Wang Xue,Li Yanxiang,&Liu Yuan.(2010).Effect of melt convection on bidirectional solidification of Mg-H eutectic..
MLA	Wang Xue,et al."Effect of melt convection on bidirectional solidification of Mg-H eutectic".(2010).

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