Application of synchrotron radiation X-ray computed tomography to investigate the agglomerating behavior of TiB2 particles in aluminum
Application of synchrotron radiation X-ray computed tomography to investigate the agglomerating behavior of TiB2 particles in aluminum
复制标题
应用同步辐射X射线计算机断层扫描研究TiB2颗粒在铝中的团聚行为
DOI：
10.1016/j.jallcom.2014.10.190
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发表时间：
2015-02
影响因子：
6.2
通讯作者：
Zhiqiang Cao
中科院分区：
文献类型：
--
作者：
Jingyu Han;Guangyuan Yan;Tongmin Wang;Zhiqiang Cao
增强颗粒的团聚对原位金属基复合材料（MMCs）的性能有许多不利影响。为了更好地理解这一现象，利用同步辐射x射线计算机断层扫描（SR-CT）和场发射扫描电镜（FESEM）研究了tib2颗粒在铝基原位mmc中的团聚行为。SR-CT被证明是可视化和量化复合材料三维（3D）特征的有力工具。基于SR-CT和FESEM结果，提出了原位Al/ tib2复合材料中最常见的片状团块、絮状团块和粗颗粒团块的形成机理。机理表明，这三种团聚体的形成可归因于三个平行过程，即扩散钛原子与AlB2反应、铝熔体与乳化盐直接反应、扩散硼原子与TiAl3反应。此外，该机制可能为未来设计更好的原位Al/ tib2复合材料的均匀颗粒分布的加工技术提供一些启示。
Agglomeration of reinforcing particles has a number of deleterious effects on the properties of in situ metal matrix composites (MMCs). In order to better understand this phenomenon, the agglomerating behavior of TiB2particles in aluminum based in situ MMCs was investigated using synchrotron radiation X-ray computed tomography (SR-CT) and field emission scanning electron microscope (FESEM). SR-CT was shown to be a powerful tool for visualizing and quantifying the three-dimensional (3D) features within the composites. Based on the SR-CT and FESEM results, a formation mechanism of the flaky agglomerates, flocculent agglomerates and clusters of coarse TiB2particles, which are most frequently presented in the in situ Al/TiB2composite, has been proposed. The mechanism shows that the formation of these three kinds of agglomerates can be attributed to three parallel processes, i.e. diffusing titanium atoms reacting with AlB2, aluminum melt directly reacting with emulsified salt, diffusing boron atoms reacting with TiAl3, respectively. Moreover, the mechanism may shed some light on how to design better processing techniques for obtaining homogenous particle distribution in in situ Al/TiB2composites in the future.
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影响因子：
6.2
作者：
Xue, Jing;Wang, Jun;Sun, Baode
通讯作者：
Sun, Baode
影响因子：
6.2
作者：
K. R. Ravi;M. Saravanan;R. M. Pillai;A. Mandal;B. S. Murty;M. Chakraborty;B. Pai
通讯作者：
K. R. Ravi;M. Saravanan;R. M. Pillai;A. Mandal;B. S. Murty;M. Chakraborty;B. Pai
影响因子：
6.3
作者：
K. L. Tee;Ling Lu;M. Lai
通讯作者：
K. L. Tee;Ling Lu;M. Lai
影响因子：
8.4
作者：
Yijie Zhang;N. Ma;Haowei Wang;Yongkang Le;Xianfeng Li
通讯作者：
Yijie Zhang;N. Ma;Haowei Wang;Yongkang Le;Xianfeng Li
影响因子：
6
作者：
R. Hamilton;M. Forster;R. Dashwood;P. Lee
通讯作者：
R. Hamilton;M. Forster;R. Dashwood;P. Lee