Mechanism for In Situ Iron Nanoparticles Formed during Copper Alloy Solidification
In-situ iron nanoparticles can be formed during copper alloy solidification. Here we consider ZCuSn3Zn8Pb6Ni1FeCo alloy and demonstrate that high undercooling is the motive power of nanoparticles during solidification , which would act as heterogeneous nuclei to achieve outstanding contribution for grain refinement compared to ZCuSn3Zn8Pb6Ni1 alloy. Convection of the melt inhibit the growth of nanoparticles by way of prohibitting the deposition of iron atoms on the surface.This technique offer new enlightenment for the control of in-situ nanoparticles formed during alloy solidification,and also opens the door to a new class of dispersed nanoparticles strengthened materials.
Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang
Q. S. Wang et al., "Mechanism for In Situ Iron Nanoparticles Formed during Copper Alloy Solidification", Advanced Materials Research, Vols. 189-193, pp. 2441-2447, 2011