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回顾了在 Ti Ni二元系合金基础上发展起来的 Ti Ni-X三元系高温形状记忆合金及 Ni Al系高温形状记忆合金。重点研究了 Ti Ni Pd系合金成分、相变温度和相变滞后的关系。结果表明 :当 Pd的原子百分数大于3 3 %,相变点的增加尤为显著 ,Pd的原子百分数提高 1 %,将导致合金的相变温度升高 2 0℃ ,当 Pd的原子百分数为 4 0 %时 ,Ms点可达 3 79.8℃。温度滞后ΔT随 Pd含量的增加基本不变 ,只是在 Pd原子百分数达到4 0 %时ΔT略有增加。相变热ΔH随 Pd含量增大呈线性增加 ,非常明显
The Ti Ni-X ternary high-temperature shape memory alloy and Ni-Al high temperature shape memory alloy developed on the basis of Ti Ni binary system alloy are reviewed. The relationship between the composition, phase transition temperature and phase transformation hysteresis of TiNiPd alloy was studied emphatically. The results show that when the atomic percentage of Pd is more than 33%, the increase of the transformation point is more remarkable. The atomic percentage of Pd is increased by 1%, the phase transition temperature of the alloy is increased by 20 ℃. When the atomic percentage of Pd is 40 %, Ms point can reach 3 79.8 ℃. The temperature hysteresis ΔT is basically unchanged with the increase of Pd content, but the ΔT slightly increases when the Pd atomic percentage reaches 40%. The phase transition heat ΔH increases linearly with the increase of Pd content, which is very obvious