A novel method to fabricate the aligned columnar dendrite via the diffusion under a strong magnetic field

• Aligned Al2Cu dendrite formed during diffusion process under the magnetic field.
• A simple growth model of the aligned columnar dendrite has been proposed.
• A method to fabricate the aligned dendrite was initiated at zero temperature gradient.

Effect of a strong magnetic field on the dendrite growth during the diffusion process in the Al/Cu diffusion couple is investigated experimentally. Results show that the aligned Al2Cu dendrite originating from the Al/Cu interface has formed during the diffusion process under a strong magnetic field. A simple growth model of the columnar dendrite during the diffusion process under a strong magnetic field has been proposed. This may initiate a novel method to fabricate the aligned columnar dendrite via the diffusion under the magnetic field in the case of no temperature gradient.