Non-isothermal nano-crystallization kinetics in amorphous Ni_(55)Nb_(35)Si_(10) alloy

作     者：H.MINOUEI G.H.AKBARI M.H.ENAYATI S.I.HONG H.MINOUEI;G.H.AKBARI;M.H.ENAYATI;S.I.HONG

作者机构：Department of Metallurgy and Materials Science Shahid Bahonar University Department of Material Engineering Nanotechnology and Advanced Material InstituteIsfahan University of Technology (IUT) Department of Nanomaterials Engineering Chungnam National University 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2019年第29卷第2期

页      面：358-364页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the Future Material Discovery Program of the National Research Foundation of Korea(NRF) funded by the Ministry of Science ICT and Future Planning(MSIP)of Korea(2016M3D1A1023532) 

主　　题：amorphous alloy kinetics nano-crystallization DSC activation energy 

摘      要：The non-isothermal crystallization kinetics of Ni55Nb35Si10 amorphous alloy,prepared by mechanical alloying,was studied using differential scanning *** amorphous alloy showed one-stage crystallization on heating,which led to the formation of nano-intermetallic crystals in amorphous *** apparent activation energy for the crystallization of the alloy,determined by the Kissinger equation,was relatively high(468 kJ/mol),indicating that this amorphous alloy has high thermal *** in the activation energy during the crystallization process,were also evaluated by iso-conversional *** results showed that it decreases slowly from the beginning to crystallized fractionα=0.35 and it remains almost constant to the end of the *** nano-crystallization mechanism for the non-isothermal crystallization of the amorphous alloy was explained by determining Avrami *** electron microscopy studies revealed the microstructural modification of amorphous alloy via nanocrystallization during *** results suggest that the nucleation rate decreases with increasing time and the crystallization mechanism is governed dominantly by a three-dimensional diffusion-controlled growth.A predictive equation was obtained based on the Sestak-Berggren autocatalytic model to describe quantitatively the non-isothermal crystallization kinetics.