The effects of Sn content on the microstructure and the formation mechanism of Ti2SnC powder by pressureless synthesis
The effects of Sn content on the microstructure and the formation mechanism of Ti2SnC powder by pressureless synthesis
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DOI：
10.1016/j.jallcom.2016.11.398
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发表时间：
2017-02
影响因子：
6.2
通讯作者：
Jianxiang Ding;Peigen Zhang;Tian Wubian;Jian Shi;M. Zhang;Y. M. Zhang;Zhengming Sun;Zhengming Sun
中科院分区：
文献类型：
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作者：
Jianxiang Ding;Peigen Zhang;Tian Wubian;Jian Shi;M. Zhang;Y. M. Zhang;Zhengming Sun;Zhengming Sun
Ti2SnC粉末有望在电触点等方面找到有前途的应用，但尚未建立有效的合成工艺。以Ti/Sn/C（摩尔比2:1:1）粉末混合物为原料，采用无压合成工艺合成了高相纯Ti2SnC粉末。合成的Ti2SnC有近球形、花状、蝴蝶结状和三角形四种主要形貌。分析和讨论了不同形貌下材料的相组成和显微组织。通过差示扫描量热法、x射线衍射和扫描电镜分析，揭示了Ti2SnC的反应途径和形成机理。
Ti2SnC powders are expected to find promising applications such as in electrical contacts while an efficient synthesis process has not been established yet. Highly phase-pure Ti2SnC powder was synthesized with Ti/Sn/C (molar ratio 2:1:1) powder mixture as starting materials by a pressureless synthesis process. Four primary morphologies of the synthesized Ti2SnC were found, namely near-spherical, flower-like, bowknot-like and triangular. The phase composition and microstructure of the materials in different morphologies were analyzed and discussed. The reaction route and formation mechanism of Ti2SnC was revealed according to the results of differential scanning calorimetry, X-ray diffraction and scanning electron microscopy.