Recycling of aluminum matrix composites

被引:2
|
作者
Nishida Y. [1 ,2 ]
Izawa N. [2 ]
Kuramasu Y. [3 ]
机构
[1] Composite Materials Laboratory, National Industrial Research Institute of Nagoya
[2] National Industrial Research Institute of Nagoya
[3] Research and Development Centre, Nippon Light Metal Company, Kambara
关键词
Material Transaction; Interface Energy; Molten Metal; Alloy Composite; Aluminum Matrix Composite;
D O I
10.1007/s11661-999-0077-x
中图分类号
学科分类号
摘要
Separation of matrix metals in composites was tried on alumina short fiber-reinforced aluminum and 6061 alloy composites and SiC whisker-reinforced 6061 alloy composite for recycling. It is possible to separate molten matrix metals from fibers in the composites using fluxes that are used for melt treatment to remove inclusions. About 50 vol pct of the matrix metals was separated from the alumina short fiber-reinforced composites. The separation ratio of the matrix from the SiC whisker-reinforced 6061 alloy composite was low and about 20 vol pct. The separation mechanism was discussed thermodynamically using interface free energies. Since the flux/fiber interface energy is smaller than the aluminum/fiber interface energy, the replacement of aluminum with fluxes in composites takes place easily. Gases released by the decomposition of fluxes act an important role in pushing out the molten matrix metal from the composite. The role was confirmed by the great amount cavity formed in the composite after the matrix metal flowed out.
引用
收藏
页码:839 / 844
页数:5
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