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Study on preparation of ultra-fine grained CNTs/AZ31 alloy composites by equal channel angular pressing

Qiang Xu

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Abstract

Carbon nanotubes/AZ31 alloy composites were prepared by means of equal channel angular pressing(ECAP) and in the die with the intersecting angle φ=90°.The results indicate that a great deal of ultra-fine grains appear in carbon nanotubes/AZ31 alloy composites just after one pass of ECAP.With the increasing of pass number,the proportion of ultra-fine grain increases.With four pressing passes,the grains are effectively refined to a mean size of 1-5μm,and the microhardness of the composites have been enhanced significantly.

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What this paper is about

Carbon nanotubes/AZ31 alloy composites were prepared by means of equal channel angular pressing(ECAP) and in the die with the intersecting angle φ=90°.The results indicate that a great deal of ultra-fine grains appear in carbon nanotubes/AZ31 alloy composites just after one pass of ECAP.With the increasing of pass number,the proportion of ultra-fine grain increases.With four pressing passes,the grains are effectively refined to a mean size of 1-5μm,and the microhardness of the composites have been enhanced significantly.

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Available abstract

Carbon nanotubes/AZ31 alloy composites were prepared by means of equal channel angular pressing(ECAP) and in the die with the intersecting angle φ=90°.The results indicate that a great deal of ultra-fine grains appear in carbon nanotubes/AZ31 alloy composites just after one pass of ECAP.With the increasing of pass number,the proportion of ultra-fine grain increases.With four pressing passes,the grains are effectively refined to a mean size of 1-5μm,and the microhardness of the composites have been enhanced significantly.

Key concepts: Pressing, Materials science, Alloy, Carbon nanotube, Indentation hardness, Composite material, Grain size, Carbon fibers

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