Experimental Investigations of the High-Temperature Phase Relationship and Ordering Transition in Ni-Mn-Ga Ternary System
Experimental Investigations of the High-Temperature Phase Relationship and Ordering Transition in Ni-Mn-Ga Ternary System
复制标题
DOI：
10.4028/www.scientific.net/amr.148-149.1695
复制
发表时间：
2010-10
期刊：
影响因子：
--
通讯作者：
Yun-qing Ma;Shuiyang Yang;R. Kainuma;K. Ishida;Cuiping Wang;Xingjun Liu
中科院分区：
文献类型：
--
作者：
Yun-qing Ma;Shuiyang Yang;R. Kainuma;K. Ishida;Cuiping Wang;Xingjun Liu
通过对平衡合金和扩散偶的分析，研究了Ni-Mn-Ga三元系在900 °C的相平衡和B2/L21有序-无序转变。在900 °C时，在较宽的成分范围内存在bcc单相区，并确定了Ni-50 at.%在Mn含量为25 at.%时，最大有序转变温度为796。所得结果对Ni-Mn-Ga合金的制备及在特定温度下的退火具有指导意义。
The phase equilibria at 900 °C and B2/L21 order-disorder transition in the Ni-Mn-Ga ternary system were investigated by analyzing the equilibrated alloys and diffusion couples using a combination of techniques. It was confirmed that a bcc single phase region exists in a wide composition range at 900 °C, and the critical temperatures of B2/L21 order-disorder transition were determined in Ni-50 at.% section, which exhibits a maximal ordering transition temperature of 796 at Mn content of 25 at.%. The obtained results will be helpful for the preparation and annealing of Ni-Mn-Ga alloys in the specific temperature.