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New type of spherical pore Al alloy foam.with low porosity and high strength

Science China Chemistry 2004年第5期47卷 407-413页

作者： ZOU Yi HE Deping JIANG Jiaqiao Department of Material Science and Engineering Southeast University Nanjing 210096 China Department of Material Science and Engineering Southeast University Nanjing 210096 China Department of Material Science and Engineering Southeast University Nanjing 210096 China

A computer system for displacement sensor is developed to obtain the real-time curve of the liquid porosity of molten Al alloy foam. The relationship between the curve ofP I-t and the change of the shape of the cells (spherical, similar spherical and polygonal) in the foam.ng process is analyzed. The changes of cell diameter and cell wall thickness are studied. And the the controlling methods of a new Al alloy foam.with spherical pores, low porosity and high strength are developed on this basis. Also, the stress-strain curve during compressive deformation and energy absorption characteristics are investigated and compared with polygonal pore Al alloy foam.with high porosity. Keywords spherical pore - low porosity - high strength - interface shifting - Al alloy foam.These authors contributed equally to this work.

关键词： spherical pore, low porosity, high strength, interface shifting, Al alloy foam.

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Spherical foam.growth in Al alloy melt

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Science China Chemistry 2005年第3期48卷 195-202页

作者： SHANG Jintang HE Deping Southeast University Nanjing 210096 China Southeast University Nanjing 210096 China

Due to the demand of high-tech Al alloy foam.with spherical pores, high strength and high energy-absorption capacity has become one of the research foci. The aim of this study is to ascertain the growth regularity of spherical foam.in Al alloy melt. Three-dimensional packing model such as face-centered cubic is established to study the spherical foam.growth. Theoretical results are compared with experimental ones, and the face-centered cubic model corresponds well with the experiment. It is reasonable to assume that the pores have the same radius, the total pore number keeps unchanged and spherical foam.grows with face-centered cubic packing mode. This study presents a useful help to control the average pore radius and film thickness.

关键词： spherical foam growth, high strength, Al alloy foam.

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Determination of interface (surface) dilatation rheological properties

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Chinese Science Bulletin 2001年第9期46卷 737-740页

作者： JIANG Long ZHAO Feng TANG Ji’an ZHU Hong LI Jinru LI Bingbing Institute of Chemistry Molecular Science CenterChinese Academy of SciencesBeijing 100101China Institute of Chemical Engineering China Mineral UniversityXuzhou 221008China

This note establishes a new method that can measure interface dilatation elastic module (ε) and dilatation viscosity (ηd) of all surfactants based on the surface pressure relaxation process. The wide applicability w... 详细信息

关键词： interface dilatation elastic module dilatation viscosity surface pressure relaxation process stability of foam.

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