Cooling rate dependent undercooling of Bi in a Zn matrix by differential fast scanning calorimetry
Cooling rate dependent undercooling of Bi in a Zn matrix by differential fast scanning calorimetry
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通过差示快速扫描量热法研究 Zn 基体中 Bi 的冷却速率相关过冷
DOI：
10.1557/jmr.2014.373
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发表时间：
2015-01
影响因子：
2.7
通讯作者：
Gao, Yulai
中科院分区：
文献类型：
--
作者：
Yang, Bin;Zhang, Quanliang;Zhai, Qijie;Gao, Yulai
采用差示快速扫描量热法，在300 ~ 6000 K/s的扫描速率范围内，对Zn基体中微米和纳米尺寸Bi液滴的过冷度随冷却速率的变化规律进行了研究。实验结果表明，嵌入纳米尺寸的Bi液滴比微米尺寸的Bi液滴在晶界处提供了更可重复的过冷度测量。此外，微、纳米尺寸Bi液滴的过冷度随冷却速率的变化规律不同，当冷却速率从300 K/s增加到6000 K/s时，纳米尺寸Bi液滴的过冷度从125 K逐渐增加到130 K。而对于晶界处的微尺寸Bi液滴，当冷却速率大于2000 K/s时，过冷度明显增加。换句话说，过冷度随冷却速率的增加呈S形变化，表明非均质形核机制由表面诱导型转变为体积诱导型。
We presented the investigation on the cooling rate dependent undercooling of the microsized and nanosized Bi droplets in the Zn matrix via differential fast scanning calorimetry at scanning rates ranging from 300 to 6000 K/s. The experimental results demonstrated that the embedded nanosized Bi droplets gave more reproducible undercooling measurements than that of microsized Bi droplets at the grain boundaries. In addition, different cooling rate dependences of undercooling of microsized and nanosized Bi droplets were found. When the cooling rate is increased from 300 to 6000 K/s, the undercooling of the embedded nanosized Bi droplets increased gradually from 125 to 130 K. However, for microsized Bi droplets at the grain boundaries, there was an obvious increase of undercooling when the cooling rate was higher than 2000 K/s. In other words, the undercooling evolution displayed a sigmoidal relationship with the increase in cooling rate, indicating the change of the heterogeneous nucleation mechanism from a surface-induced mode to a volume-induced one.
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影响因子：
3.2
作者：
J. Mu;Z. W. Zhu;H. Zhang;H. Fu;A. M. Wang;Huixin Li;Zushu Hu
通讯作者：
J. Mu;Z. W. Zhu;H. Zhang;H. Fu;A. M. Wang;Huixin Li;Zushu Hu
通过快速扫描量热法研究纯锡单滴过冷的冷却速率依赖性
DOI：
10.1007/s00339-010-6100-7
发表时间：
2011-07
期刊：
Applied Physics A-Materials Science & Processing
影响因子：
--
作者：
Bin Yang;Yulai Gao;Changdong Zou
通讯作者：
Changdong Zou
影响因子：
3.2
作者：
P. Swaminathan;D. Laván;T. Weihs
通讯作者：
P. Swaminathan;D. Laván;T. Weihs
影响因子：
3.5
作者：
Yulai Gao;E. Zhuravlev;Changdong Zou;Bin Yang;Q. Zhai;C. Schick
通讯作者：
Yulai Gao;E. Zhuravlev;Changdong Zou;Bin Yang;Q. Zhai;C. Schick
影响因子：
9.4
作者：
P. Schaffer;R. Mathiesen;L. Arnberg
通讯作者：
P. Schaffer;R. Mathiesen;L. Arnberg