纳米-
分形
氧化物
金属
三元运算
合金
材料科学
纳米技术
纳米尺度
热的
化学工程
化学物理
纳米材料
冶金
化学
计算机科学
热力学
复合材料
物理
工程类
数学分析
数学
程序设计语言
作者
Andrew Martin,Winnie M. Kiarie,Boyce S. Chang,Martin Thuo
标识
DOI:10.1002/ange.201912639
摘要
Abstract Studies on passivating oxides on liquid metals are challenging, in part, due to plasticity, entropic, and technological limitations. In alloys, compositional complexity in the passivating oxide(s) and underlying metal interface exacerbates these challenges. This nanoscale complexity, however, offers an opportunity to engineer the surface of the liquid metal under felicitous choice of processing conditions. We inferred that difference in reactivity, coupled with inherent interface ordering, presages exploitable order and selectivity to autonomously present compositionally biased oxides on the surface of these metals. Besides compositional differences, sequential release of biased (enriched) components, via fractal‐like paths, allows for patterned layered surface structures. We, therefore, present a simple thermal‐oxidative compositional inversion (TOCI) method to introduce fractal‐like structures on the surface of these metals in a controlled (tier, composition, and structure) manner by exploiting underlying stochastic fracturing process. Using a ternary alloy, a three‐tiered (in structure and composition) surface structure is demonstrated.
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