| 摘要 |
The present invention relates to a shape memory business card. A shape memory alloy is cut into a shape of a thin rectangular sheet. Characters, patterns, logos, or pictures are printed on a surface of the cut shape memory alloy. The printed part is heat-treated at a predetermined temperature to be extruded by the temperature of a person or the temperature of a user holding the business card to be seen on a three-dimensional basis. The shape memory alloy uses a Ti-Ni alloy. In the weight ratio of Ti and Ni in the Ti-Ni alloy, Ti takes 48 at% or less while Ni takes 58 at% or less. The transformation temperature (Ms) of the Ti-Ni alloy is 330-220 K. The Ni is replaced with Cu while the Ti-Ni alloy is added with at least one element among Nb, V, Cr, Mn, Co, Hf, Zr, Pd, and Pt to form the shape memory business card. |
