Preparation of Freestanding Zn Nanocrystallites by Combined Milling at Cryogenic and Room Temperatures

作者：Tiwary Chandra Sekhar; Verma Akash; Kashyp Sanjay; Biswas Krishanu^*; Chattopadhyay Kamanio

来源：Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science, 2013, 44A(4): 1917-1924.

DOI：10.1007/s11661-012-1508-7

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 +/- A 2 nm after 3 hours of cryomilling. The crystallite size increases to 30 +/- A 2 nm after 3 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.

• 出版日期2013-4