摘要
研究了Ni48Mn33Ga19合金添加微量稀土元素Tb和Sm后,对合金的马氏体相变、磁感生应变及机械抗弯性能的影响。结果发现,微量稀土元素Tb和Sm的掺入,降低了合金的马氏体相变温度和居里温度,但晶粒显著细化,使合金的抗弯强度显著提高,具有良好的塑韧性;同时,使合金的磁感生应变值有一定下降。
The effects of microamount additions of RE (Tb, Sm) on the martensitic transition, the magnetic-field-induced strain and the bending strength of highly textured polycrystalline Ni_(48)Mn_(33)Ga_(19) alloy were investigated. The experimental results show that the addition of RE elements decreases the martensitic transformation temperature and the Curie temperature. But the bending strength of Ni-Mn-Ga-RE (RE=Tb, Sm) alloys increases remarkably because of grain refinement. As a result, Ni-Mn-Ga-RE alloys will be applied practically with higher reliability and stability due to favorable plasticity and toughness. In addition, the replacement of small amounts Ga by Tb or Sm decreases the magnetic-field-induced strain of the alloys at room temperature.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2003年第6期668-671,共4页
Journal of the Chinese Society of Rare Earths
基金
国家863计划新材料领域项目(2001AA327022)
