Abstract
In the present paper, ball milling is used to produce Ni49.8Mn28.5Ga21.7 particles of micrometer size. Although the characteristics of transformation are not observed in the as-milled particles from 150 to 523 K from differential scanning calorimetry (DSC) study, the particles exhibit the same transformation behaviour as the bulk sample after annealing at 1073 K for 2 h. The as-annealed particles show good thermal cycling stability even after five thermal cycles. Temperature memory effect during the reverse martensitic transformation is found in the as-annealed particles. The particles exhibit regular shape, with 10M martensite structure at room temperature.
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