Direct observation of the segregation driven by bubble evolution and liquid phase separation in Al–10 wt.% Bi immiscible alloy. (June 2015)

• Record Type: Journal Article
• Authors: Lu, Wenquan; Zhang, Shuguang; Zhang, Wei; Kaptay, George; Yu, Jianding; Fu, Yanan; Li, Jianguo
• Is Part Of: Scripta materialia. Volume 102(2015)
• Page Start: 19
• Page End: 22
• Publication Date: 2015-06
• Subjects: Immiscible alloy -- Segregation -- Bubble -- Logistic function; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.02.004
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract : The effects of the growth behaviors of bubbles and minor droplets on the segregation in solidifying Al–10 wt.% Bi immiscible alloy were investigated by synchrotron radiography. The Bi atoms were effectively trapped at the surface of bubbles, favorable to the bubble growth. With cladding Bi layer, the stochastic growth of bubbles remains, but the scaled size distribution follows neither Gaussian nor Lifshitz–Slyozov–Wagner (LSW) controlled distributions. The variation in Bi droplet number over time obeys a logistic curve.