基于Miedema混合焓模型外推出三元合金的热力学性能,利用合金成分的特点计算出了Ti-46Al-8Nb-0.1Er四元合金的各组元间的部分热力学性能,并结合Toop模型得出合金的组元活度及活度系数.结果表明,在此四元系中Er只与Al发生反应,与其它组元之间无反应,生成Er-Al化合物.然而在热力学上,Er2 O3比Er-Al化合物更易形成,实验中熔体里不可避免的微量氧的介入,使得合金熔炼过程中Er首先与O结合形成Er2O3颗粒,且此Er2 O3相在XRD测试分析证明得到.Er具有净化合金熔体、降低合金基体氧含量和析出强化的作用.
参考文献
| [1] | Miedema A R;Ch(a)tel P F;Boer F R .Cohesion in alloys-fundamentals of a semi-empirical model[J].Physica B + C,1980,100(01):1-28. |
| [2] | 孙顺平,易丹青,陈振湘,周明哲,王斌.Er在Al-Mg-Si合金中的存在形式及其热力学分析[J].材料热处理学报,2011(01):138-143. |
| [3] | R. Hojvat de Tendler;M. R. Soriano;M. E. Pepe .Calculation of metastable free-energy diagrams and glass formation in the Mg-Cu-Y alloy and its boundary binaries using the Miedema model[J].Intermetallics,2006(3):297-307. |
| [4] | Yan LJ;Zheng SB;Ding GJ;Xu GT;Qiao ZY .Surface tension calculation of the Sn-Ga-In ternary alloy[J].Calphad: Computer Coupling of Phase Diagrams and Thermochemistry,2007(1):112-119. |
| [5] | 朱艳,杨延清.钛合金及金属间化合物中各组分的活度系数[J].稀有金属材料与工程,2003(08):600-603. |
| [6] | 吴玉锋,杜文博,聂祚仁,苏学宽,左铁镛.Mg-Al-M合金中Al-M相（M=Sr,Nd）析出行为的热力学分析[J].金属学报,2006(05):487-491. |
| [7] | Wang W C;Li J H;Yan H F et al.A thermodynamic model proposed for calculating the standard formation enthalpies of ternary alloy systems[J].Scripta Materialia,2007,56(11):975-978. |
| [8] | Y. Ouyang;X. Zhong;Y. Du .Formation enthalpies of Fe-Al-RE ternary alloys calculated with a geometric model and Miedema's theory[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2006(1/2):148-154. |
| [9] | 申坤,汪明朴,曹玲飞,郭明星,李树梅,董琦袆.新型FeMB系纳米晶软磁材料的成分设计[J].中国有色金属学报,2007(10):1661-1666. |
| [10] | Zhang RF;Sheng SH;Liu BX .Predicting the formation enthalpies of binary intermetallic compounds[J].Chemical Physics Letters,2007(4-6):511-514. |
| [11] | Wang W C;Li J H;Yan H F et al.A thermodynamic model proposed for calculating the standard formation enthalpies of ternary alloy systems[J].Scripta Materialia,2007,56(11):975-978. |
| [12] | 宁爱林,邹利华,宁康琪,彭北山.Al-4Cu-Mg-Er合金均匀化制度研究[J].热加工工艺,2012(16):165-167. |
| [13] | 宋旼 |
| [14] | 丁学勇;范鹏 .三元系金属熔体中的活度和活度相互作用系数模型[J].金属学报,1994,30(02):B049-B060. |
| [15] | 张永刚;韩雅芳;陈国良.金属间化合物结构材料[M].北京:国防工业出版社,2001 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%