Crystal structure and formation mechanism of the secondary phase in Heusler Ni-Mn-Sn-Co materials
Document Type
Article
Publication Date
11-27-2014
Abstract
In the present work, crystal structure and formation mechanism of the secondary phase in Heusler Ni- Mn-Sn-Co materials were investigated using X-ray diffraction, scanning/transmission electron microscopy and selected-area electron diffraction techniques. Experimental results showed that the secondary phase presented in both Ni44.1Mn35.1Sn10.8Co10 as-cast bulk alloy and melt-spun ribbon, possessing a face-centered cubic (fcc) Ni17Sn3-type structure. The secondary phase in the as-cast bulk alloy was resulted from a eutectic reaction after the formation of a primary dendritic ? phase during cooling. However in the melt-spun rapidly solidified ribbon, the secondary phase was largely suppressed as nano-precipitates distributed along the grain boundaries, which was attributed to a divorced eutectic reaction. The secondary phase exhibited partial amorphous state due to high local coolinrate.
Recommended Citation
Yu, Jin Ke; Li, Hong Wei; Zhai, Qi Jie; Fu, Jian Xun; Luo, Zhi Ping; and Zheng, Hong Xing, "Crystal structure and formation mechanism of the secondary phase in Heusler Ni-Mn-Sn-Co materials" (2014). College of Health, Science, and Technology. 1023.
https://digitalcommons.uncfsu.edu/college_health_science_technology/1023