Research for Crystallization of Metallic Glass Pd79.5Ni4Si16.5 by Slow Positron Beam

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HAN Rong-Dian, WENG Hui-Min, ZHOU Xian-Yi, XU Ji-Hua, ZHU Jing-Sheng, LI Xiao-Guang, SHA Jian and WANG Jing-Cheng. Research for Crystallization of Metallic Glass Pd79.5Ni4Si16.5 by Slow Positron Beam[J]. Chinese Physics C, 1993, 17(4): 300-304.
HAN Rong-Dian, WENG Hui-Min, ZHOU Xian-Yi, XU Ji-Hua, ZHU Jing-Sheng, LI Xiao-Guang, SHA Jian and WANG Jing-Cheng. Research for Crystallization of Metallic Glass Pd79.5Ni4Si16.5 by Slow Positron Beam[J]. Chinese Physics C, 1993, 17(4): 300-304. shu
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Received: 1900-01-01
Revised: 1900-01-01
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Research for Crystallization of Metallic Glass Pd79.5Ni4Si16.5 by Slow Positron Beam

    Corresponding author: HAN Rong-Dian,
  • Department of Modern Physics,University of Science and Technology of China,Hefei 2300262 Structure Research Laboratory,University of Science and Technology of China,Academia Sinica,Hefei 2300263 International Center for materials Physics,Academia Sinica,Shenyang 1100154 Shanghai Institute of Steel and Iron,Shanghai 200940

Abstract: The monoenergetic slow positron beam was first used to study the crystalliation process of metallic glasses.The measurement of Doppler broadening spectra as a function of positron energy was made on the samples of metallic glass Pd79.5Ni4Si16.5 in various states.It is shown that there are a number of the vacancy-like defects in the as-quenched state sample.Its crystallization started at the sample surface.Slow position beam turned out to be an effective probe to study the structural change of metallic glasses.

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