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increases with the crystallization temperature, in the range of 40%-50%, which is close to the calculated ones of standard samples with spodumene quartz ratio of 40%-70%. The activation energy... silicates; crystallinity; crystallization mechanisms; activation energy
; activation energy
非晶合金因其独特的微观结构和一系列优异的性能而受到众多材料学者和物理学家的重视[1-3].在众多已经...-isothermal crystallization process and activation energy for crystal growth in amorphous materials[J]. Journal of Materials Science, 1984, 19: 291-296.
[16] POLK, D E, CALKA A, GIESSEN B C. The preparation......Ni59Zr16Ti13Si3Sn2Nb7非晶合金的晶化动力学
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来源： 《中国有色金属学报2008年第4期》——代江波 李金山 寇宏超 常辉 胡锐 薛祥义
the energy of grain boundary diffusion. The addition of Sc and Zr decreases activation energy and improves the superplastic property of Al-Mg-Mn alloy. The addition of Sc and Zr refines the grain... motion and dynamic recrystallization harmonize the grain boundary sliding during deformation. Key words: Sc; Zr; Al-Mg-Mn alloy; superplasticity; grain boundary sliding; activation energy ......
activation energy is 43.26 kJ/mol. During this process, the chemical reaction is the control step, and the reaction order of H2SO4 is 0.433 84. The third stage is the leaching of copper oxide wrapped by hematite-limonite and silicate ore with apparent activation energy of 16.08 kJ/mol, which belongs to the mixed control. Key words: copper oxide ore; H2SO4; leaching; kinetics; activation energy......
concentration on oxidation characteristic of soot are investigated. The activation energy of soot increases with the increase of ageing temperature and oxygen concentration. The activation energy... strategy. Key words: thermal ageing; oxidation performance; soot nanostructure; activation energy Cite this article as: MENG Zhong-wei, LI Jian, ZHANG Qian, HUANG Jun-feng, JIANG Yuan, QIN Yuan, G G......
in interfacial reaction layers, and multi-layer interfacial reaction compounds form. Alloying element Nb in matrix remarkably diffuses into interfacial reaction zone and changes the activation energy for the interfacial reaction layer growth following a role of parabolic rate. The activation energy (Qk) and (k0) of SCS-6 SiC/super α2 and SCS-6 SiC/Ti2AlNb are 317.664 kJ/mol, 175.709 kJ/mol and 5.4438×10－2......
(Cu50Zr42Al8)96Y4块状非晶的变温晶化行为屠鹏1,寇生中2(1.甘肃省兰州市甘肃农业大学2.兰州理工大学,兰州 730050)摘 要:研究(Cu50Zr42Al8)96Y4大块非晶合金在连续升温过程中的晶化行为.结果表明,随升温速度的加快,玻璃转变温度Tg,晶化起始温度Tx,晶化峰值温度Tp都向高温区移动,过冷温度区△Tx扩大到了72.5K.运用Kissinger法分别计算出玻璃转变激活能Eg为512.34kJ/mol,晶化起始激活能Ex为372.44kJ/mol,晶化峰的激活能Ep1和Ep1为4......
deformation temperature and decreasing strain rate, which can be represented by a Zener-Hollomon exponential equation with the activation energy for deformation of 157.9 kJ/mol. The substructure in the deformed... mainly to dynamic recovery and dynamic recrystallization. Key words: Al-Zn-Cu-Mg-Sc-Zr alloy; hot deformation; flow softening; microstructural evolution; activation energy ......
