李瑛
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林海潮
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曹楚南
中国腐蚀与防护学报
利用扫描隧道显微镜观察了大气条件下FeNiSiB非晶合金在自然大气环境下腐蚀前后表面的微观形貌特征,并对所获结果进行分析,以探讨非晶合金的微观结构与大气腐蚀行为的关系。结果表明:实验所用非晶材料的微观结构是由几个原子首先组成2纳米左右的颗粒团,此颗粒团经无序密堆,最后形成非晶合金。非晶合金结构具有自仿性,在微米、纳米尺度具有相同的分维数;在大气中非晶合金以2纳米左右的颗粒团为基本单元发生均匀腐蚀,且腐蚀前后非晶合金表面具有相同的分维数。
关键词:
大气腐蚀
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Amorphous alloys
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STM
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Fractal dimension
Peng Zhang
材料科学技术（英文）
The characterization of reinforcement in 15% SiC particles reinforced Al matrix composites processed by powder metallurgy route was studied by statistical method. During the analysis, a new approach for the estimation of the characterization of reinforcement was presented. The mathematic software MATLAB was used to calculate the area and perimeter of reinforcement, in which the image processing technique was applied. Based on the calculation, the fractal dimension, shape factor, reinforcement size distribution and reinforcement distribution were investigated. The results show that the reinforcement shape is similar to rectangle; the reinforcement size distribution is broad with the range of 1-12 μm; the topography of reinforcement is smooth; and the reinforcement distribution is inhomogeneous. Furthermore, the cell model based on the statistical characterization was established and tested.
关键词:
Particle reinforced Al matrix composites
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