摘要
研究了Ni53Mn22Ga25磁性记忆合金在190～390K温度范围的内耗行为。结果表明,当合金发生正、逆马氏体相变时出现明显的内耗峰,并伴随模量变化出现极小值。马氏体相变后继续降温,在215K附近出现新的内耗峰,模量明显增高。合金在居里温度发生顺磁及铁磁正反转变时,内耗及模量均不发生变化。对上述现象进行了分析和讨论。
The internal friction of Ni_(53)Mn_(22)Ga_(25) magnetic shape memory alloy have been studied in a temperature range of 190-390 K. It has been shown that a prominent internal friction maximum and modulus minimum are corresponding to martensitic transformation and the reverse transformation. After the martensitic transformation, another internal friction peak is appeared at about 215 K, with a increased modulus. There are no obvious changes in internal friction and modulus when the transformation between paramagnetism and ferromagnetism takes place at Curie temperature (T_c). Above mentioned phenomena have been discussed.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2004年第2期63-66,共4页
Journal of Iron and Steel Research
基金
国家"863"计划资助项目(AA200132722)
内蒙古自然科学基金资助项目(200308020214)
关键词
内耗
相变
Ni—Mn—Ga合金
磁性形状记忆合金
internal friction
phase transformation
Ni-Mn-Ga alloy
magnetic shape memory alloy
