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材料工程  2020, Vol. 48 Issue (8): 126-133    DOI: 10.11868/j.issn.1001-4381.2019.000650
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
TiO2粒径对Al-TiO2-C细化剂组织及细化效果的影响
刘欢1, 张瑞英1,2, 李金轩1, 杨森1, 闫晗1
1. 内蒙古工业大学 材料科学与工程学院, 呼和浩特 010051;
2. 内蒙古工业大学 内蒙古轻合金重点实验室, 呼和浩特 010051
Effect of TiO2 particle size on microstructure and refining effect of Al-TiO2-C refiner
LIU Huan1, ZHANG Rui-ying1,2, LI Jin-xuan1, YANG Sen1, YAN Han1
1. School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot 010051, China;
2. Inner Mongolia Key Laboratory of Light Metal Materials, Inner Mongolia University of Technology, Hohhot 010051, China
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摘要 以Al粉,TiO2粉,C粉为原料,通过放热弥散法制备Al-TiO2-C细化剂,其中TiO2的粒径分别为30,60,90,200 nm。研究TiO2的粒径对细化剂组织的影响以及不同细化剂对工业纯铝的细化效果。利用XRD,SEM,EDS技术表征不同TiO2粒径制备的Al-TiO2-C细化剂相组成和显微组织。结果表明:Al-TiO2-C细化剂主要由Al3Ti,TiC和Al2O3相组成。TiO2粒径的变化会直接影响第二相的数量、分布与形貌,当TiO2粒径为30~90 nm时,Al-TiO2-C细化剂中Al3Ti和TiC数量多但有明显的偏聚现象,分布不均匀,其中Al3Ti相呈长条状。当TiO2粒径为200 nm时,第二相分布均匀但数量较少,其中Al3Ti相呈块状。添加30 nm TiO2制备的Al-TiO2-C细化剂后,α-Al形核温度由659.4℃上升到661.8℃,再辉温度由1.2℃下降到0.3℃,平均晶粒尺寸最小为633 μm,细化效果最佳。
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刘欢
张瑞英
李金轩
杨森
闫晗
关键词 Al-TiO2-C细化剂TiO2粒径热分析工业纯铝    
Abstract:The Al-TiO2-C refiners were prepared by the in-situ exothermic dispersion method using Al,TiO2 and C powders. The particle sizes of TiO2 were 30,60,90 nm and 200 nm, respectively. The effects of particle size of TiO2 on the refiner microstructure were studied. The refinement effect on industrial pure aluminum was evaluated. The XRD, SEM and EDS techniques were used to characterize the phase composition and the microstructure of Al-TiO2-C refiners. The results show that the Al-TiO2-C refiners compose of Al3Ti,TiC and Al2O3.The particle size of TiO2 directly affects the amount,distribution and morphology of the second phase. When the particle size of TiO2 is 30-90 nm,the amount of Al3Ti and TiC is large. However, the segregation phenomenon is obviously observed. The distribution of particles is not uniform. The Al3Ti is lath-like. When the particle size of TiO2 is 200 nm,the distribution of second phases is uniform and the amount is small. The Al3Ti is blocky. After adding the Al-TiO2-C refiner prepared by 30 nm TiO2, the nucleation temperature of α-Al increases from 659.4 ℃ to 661.8 ℃.Re-heating temperature is dropped from 1.2 ℃ to 0.3 ℃.The minimum average grain size is 633 μm. The refinement effect is the best in this condition.
Key wordsAl-TiO2-C refiner    TiO2 particle size    thermal analysis    industrial pure aluminum
收稿日期: 2019-07-12      出版日期: 2020-08-15
中图分类号:  TB331  
通讯作者: 张瑞英(1972-),女,副教授,博士,主要从事铝合金及金属基复合材料的研究,联系地址:内蒙古自治区呼和浩特市新城区爱民街49号内蒙古工业大学材料科学与工程学院(010051),E-mail:zhang_ruiying@126.com     E-mail: zhang_ruiying@126.com
引用本文:   
刘欢, 张瑞英, 李金轩, 杨森, 闫晗. TiO2粒径对Al-TiO2-C细化剂组织及细化效果的影响[J]. 材料工程, 2020, 48(8): 126-133.
LIU Huan, ZHANG Rui-ying, LI Jin-xuan, YANG Sen, YAN Han. Effect of TiO2 particle size on microstructure and refining effect of Al-TiO2-C refiner. Journal of Materials Engineering, 2020, 48(8): 126-133.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2019.000650      或      http://jme.biam.ac.cn/CN/Y2020/V48/I8/126
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