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用相界面摩擦原理计算了Ni52 5Mn2 3 5Ga2 4单晶样品在马氏体相变过程中由于相界面摩擦所消耗的能量 .计算结果表明 ,克服相界面摩擦所需要的能量为 13 14J mol,仅占相变潜热的一小部分 .另外 ,精细的交流磁化率测量样品的转变循环回线结果表明 ,相变热滞后的大小和马氏体的转变百分数成正比 ,从而进一步证明了热弹性马氏体相变的热滞后来源于相界面推移过程中的摩擦 .
The friction energy consumed by phase interface during the martensitic transformation of Ni52 5Mn2 3 5Ga2 4 single crystal was calculated by the friction principle of phase interface. The calculated results show that the energy required to overcome the phase boundary friction is 13 14 J mol and only Accounting for a small part of the latent heat of phase transformation.In addition, the results of the transition loop of the fine AC magnetic susceptibility measurement sample show that the magnitude of the phase-change thermal hysteresis is proportional to the percentage of martensite transformation, which further proves that the thermo- The thermal hysteresis of bulk transformation originates from the friction in the phase interface.