Cu对Co_(41)Ni_(33)Al_(26)合金马氏体相变和磁性转变的影响  

Influence of Cu on the Martensitic and Magnetic Properties of Co_(41)Ni_(33)Al_(26) Alloy

作　　者：罗丰华[1] 卢静[1] 陈明军[1] 孟康龙[1] 刘浪飞[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《材料工程》2007年第11期37-40,65,共5页Journal of Materials Engineering

摘　　要：采用金相显微技术、DSC、VSM方法,研究了Cu含量x(x=3,5,8)对Co41Ni33Al26合金马氏体相变和Curie点的影响。结果发现在x≤5%范围内,Co41Ni33-xAl26Cux合金马氏体相变温度与x的关系成直线变化,x每增加1%,马氏体相变温度降低约44K;其Curie点随x增加而缓慢下降,x每增加1%,Curie点约降低3.6K。与L10马氏体结构的Co41Ni33-xAl26Cux(x=0,3,5)合金相比,具有B2结构的Co41Ni25Al26Cu8合金易磁化,并且饱和磁化强度低。Co-Ni-Al alloy is a promising ferromagnetic shape memory alloy for its good workability.The influence of Cu concentration x（x=3,5,8） on the martensitic transformation temperature and Curie point of Co41Ni33Al26 alloys were investigated by optical Metallography,DSC and VSM methods.The results show that martensitic transformation temperatures of Co41Ni33-xAl26Cux alloys decrease quickly with the increasing of Cu concentration x.In the range of x≤5%,1% Cu substitute Ni can decrease the martensitic transition temperature by 44K for alloys quenched from 1623K.Whereas the influence of x on Curie point isn＇t so strong,the decreasing in Curie point is only 3.6K for 1% increasing of Cu element.Comparing to Co41Ni33-xAl26Cux（x=0,3,5） alloys with L10 martensitic crystal structure,Co41Ni25Al26Cu8 with B2 crystal structure is easy to be magnetized and has the lowest magnetization saturation.

关 键 词：Co-Ni-Al-Cu合金 马氏体相变 CURIE点 

分 类 号：TG139.6[一般工业技术—材料科学与工程]