铽对Ni_(50)Mn_(29)Ga_(21)磁性形状记忆合金抗弯强度的影响

Effect of Terbium on Bending Strength of Ni-Mn-Ga Magnetic Shape Memory Alloy

研究了Tb对Ni50Mn29Ga21磁性记忆合金抗弯强度的影响。结果表明,Tb可以通过两种途径提高合金抗弯强度:在Tb含量<0.1%时,Tb利用它的还原性除去合金内容易引起合金脆性的有害元素氧来净化合金;在Tb含量>0.1%时,Tb除了净化合金作用外,还通过细化晶粒提高合金抗弯强度。

Effect of terbium on the bending strength of Ni_(50)Mn_(29)Ga_(21) magnetic memory alloy was investigated. The results show that the bending strength of the alloy is increased dramatically by Tb addition in two ways. When content of Tb<0.1%, Tb reduces brittleness of alloys by cleaning O. When content of Tb>0.1%, Tb increases the bending strength of the alloy by fining grains.