Structure and magnetic properties of Ni50−xCoxMn50−yAly (x = 5–9, y = 18–19) shape memory alloy ribbons
作者:Nguyen Huy Dan、Kieu Xuan Hau、Nguyen Hai Yen、Pham Thi Thanh、Nguyen Huy Ngoc、Truong Viet Anh、Nguyen Thi Nguyet Nga、Do Thi Kim Anh
DOI:10.1016/j.jallcom.2022.165470
日期:2022.9
Alloy ribbons of Ni50−xCoxMn50−yAly (x = 5, 6, 7, 8 and 9; y = 18 and 19) were fabricated by using melt-spinning method. By varying Co and Al concentrations, the formation of crystalline phases, structural transformations and magnetic phase transitions can be tuned as desired. With high Al and Co concentrations, only a ferromagnetic-paramagnetic (FM-PM) transition of the austenitic phase occurs in
Ni 50−x Co x Mn 50−y Al y合金带(x = 5, 6, 7, 8 和 9; y = 18 和 19) 采用熔纺法制造。通过改变 Co 和 Al 的浓度,可以根据需要调整结晶相的形成、结构转变和磁相变。在 Al 和 Co 浓度较高的情况下,奥氏体相的铁磁-顺磁 (FM-PM) 转变仅发生在 350–450 K 的范围内。而另外的弱铁磁-铁磁 (WFM-FM) 转变对应于低 Al 和 Co 浓度带材的马氏体-奥氏体 (MA) 结构转变。合金薄带的 MA 转变温度可以在 150–360 K 的范围内获得。在 Co 和 Al 浓度分别为 8 和 18 at% 的薄带样品中观察到结构和磁性能的异常变化。