摘要
在Na_3AlF_6-4%MgF_2-2%CaF_2-Sc_2O_3-ZrO_2熔盐体系中,电解制备Al-Sc-Zr合金,考察氧化物添加量及电解时间对合金元素含量的影响,利用光学显微镜、Image J图像分析软件,研究钪锆含量对合金晶粒尺寸的影响。结果表明,通过控制电解条件,制备出钪含量0.186%～0.526%,锆含量0.116%～0.556%的Al-Sc-Zr合金。合金晶粒尺寸随合金中钪锆含量比值w（Sc）/w（Zr）的增大而减小。扫描电镜及能谱分析发现合金中初生相为Al_3（Sc,Zr）粒子,粒子中的钪和锆原子数与合金中钪和锆的含量有关,不同钪和锆原子比例的Al3（Sc,Zr）粒子对合金组织细化效果不同。
Al-Sc-Zr alloy is prepared by molten salt electrolysis in Na_3AlF_6-4% MgF_2-2% CaF_2-Sc_2O_3-ZrO_2 electrolyte system. The effect of oxide additive and electrolysis time on alloying element content is investigated. The effect of Sc and Zr content on the grain sizes of the alloys is studied by the optical microscope observation and Image J analysis software. The results indicate that Al-Sc-Zr alloys with Sc content of 0. 186% ~ 0. 526% and Zr content of 0. 116% ~ 0. 556% can be prepared by adjustment of the electrolysis condition. The grain sizes of the alloy is decreased with the increase of w（ Sc） / w（ Zr）.The primary precipitate in the alloy is Al_3（ Sc,Zr） by the SEM-EDS analysis. The atomic ratio of Sc and Zr in the Al_3（ Sc,Zr） grains is corresponding to the content of Sc and Zr in the alloys. The effect of the precipitate with varying proportion of Sc and Zr atoms on the refinement of the microstructure is different.
出处
《有色金属工程》
CSCD
北大核心
2016年第2期36-39,51,共5页
Nonferrous Metals Engineering
基金
中央高校基本科研业务专项(FRF-UM-15-049)
