Application of improved analytical model for non-isothermal phase transformation

Application of improved analytical model for non-isothermal phase transformation
复制标题

改进的非等温相变分析模型的应用

DOI:
10.1179/1743284712y.0000000143
复制
发表时间:
2013-02
影响因子:
1.8
通讯作者:
Sun B
Sun B
中科院分区:
材料科学3区
文献类型:
--
作者:
Jiang YH;Liu F;Song SJ;Sun B

文献摘要

参考文献

相似文献

对于在不同转变温度下发生的具有不同总有效活化能的转变,定量地研究了初始转变温度T0的影响。从而为选择合适的转化动力学模型(解析模型或改进的解析模型)提供了指导。对于在高温下发生的总有效活化能较低的相变,涉及T0的项不可忽略,改进的解析模型的应用是必不可少的。用改进的解析模型描述了用差示扫描量热法测定的非晶Ti 50 Cu 42 Ni 8合金的第二晶化阶段。在此基础上,将相变的主要机制描述为:混合形核(位饱和和连续形核的结合)、界面控制生长和随机分散的碰撞模式。确定了合理的相变动力学参数,特别是成核和生长活化能(即QN = 233 kJ mol−1和QG = 288 kJ mol−1)。    
For the transformations with different overall effective activation energies occurring at different transformation temperatures, the effect of initial transformation temperature T0 has been quantitatively studied. Consequently, a guideline for selecting a proper model (analytical model or improved analytical model) to describe the transformation kinetics was given. For transformations with low overall effective activation energy occurring at high temperature, the terms involving T0 cannot be neglected, and the application of the improved analytical model is indispensable. The second crystallisation stage of amorphous Ti50Cu42Ni8 alloy as measured by differential scanning calorimetry was described by the improved analytical model. On this basis, the prevailing mechanisms of the transformation can be described as follows: mixed nucleation (combination of site saturation and continuous nucleation), interface controlled growth and impingement mode due to random nuclei dispersion. Reasonable kinetic parameters of the transformation were determined, especially the nucleation and growth activation energies (i.e. QN = 233 kJ mol−1 and QG = 288 kJ mol−1).
DOI: 10.1016/j.actamat.2010.08.019
发表时间: 2010-11
期刊: Acta Materialia
影响因子: 9.4
作者:
Nitsche H;Liu F;Sommer F;Mittemeijer EJ
通讯作者: Mittemeijer EJ
DOI: 10.1016/0001-6160(83)90075-5
发表时间: 1983-01-01
期刊: ACTA METALLURGICA
影响因子: --
作者:
BUSCHOW, KHJ
通讯作者: BUSCHOW, KHJ
DOI: --
发表时间: 1940
影响因子: 5.3
作者:
M. Avrami
通讯作者: M. Avrami
DOI: 10.1017/cbo9781139207249.009
发表时间: 2012
期刊: --
影响因子: --
作者:
W. Marsden
通讯作者: W. Marsden
DOI: 10.1016/0001-6160(83)90134-7
发表时间: 1983-11
期刊: --
影响因子: --
作者:
C. Thompson;A. L. Greer;F. Spaepen
通讯作者: C. Thompson;A. L. Greer;F. Spaepen