Preparation of Freestanding Zn Nanocrystallites by Combined Milling at Cryogenic and Room Temperatures
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- 作者：Chandra Sekhar Tiwary (1)
Akash Verma (2)
Sanjay Kashyp (1)
Krishanu Biswas (2)
Kamanio Chattopadhyay (1) - 刊名：Metallurgical and Materials Transactions A
- 出版年：2013
- 出版时间：April 2013
- 年：2013
- 卷：44
- 期：4
- 页码：1917-1924
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Akash Verma (2)
Sanjay Kashyp (1)
Krishanu Biswas (2)
Kamanio Chattopadhyay (1)
1. Department of Materials Engineering, Indian Institute of Science, Bangalore, 560012, Karnataka, India
2. Department of Materials Science and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, Uttar Pradesh, India - ISSN：1543-1940
文摘
The present investigation reports the preparation of freestanding nanocrystalline Zn by combined mechanical milling at cryogenic and room temperatures. The cryomilling is used as an effective means of rapid fracturing. The detailed scanning electron microscopy and transmission electron microscopy observations indicate that the minimum crystallite size is 6聽卤聽2聽nm after 3聽hours of cryomilling. The crystallite size increases to 30聽卤聽2聽nm after 3聽hours of room temperature milling of the cryomilled powder due to deformation-induced sintering. Detailed theoretical analysis allows us to obtain a diagram of size of the nanoparticles formed vs temperature to explain the experimental findings.