Wetting of carbide ceramics (B4C, SiC, TiC and ZrC) by molten Ni at 1753 K
Wetting of carbide ceramics (B4C, SiC, TiC and ZrC) by molten Ni at 1753 K
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DOI：
10.1016/j.jallcom.2015.07.138
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发表时间：
2015-11
影响因子：
6.2
通讯作者：
Q. Lin;Ran Sui
中科院分区：
文献类型：
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作者：
Q. Lin;Ran Sui
采用改进的座滴法研究了1753 K下熔融Ni对碳化物陶瓷（B4 C、SiC、TiC和ZrC）的润湿性。由于金属陶瓷（TiC和ZrC）中的部分金属键，它们的固有润湿性优于主要为共价键的陶瓷（B4 C和SiC）。固相密度越小，溶解越倾向于垂直方向，润湿性改善越有限。特定体系（Ni/碳化物陶瓷体系）的最终润湿性与基体中溶解的溶质、再结晶相和界面结构特征有关。溶解润湿的扩展动力学可以用分子动力学模型来描述，三线运动的主要能垒可能来自溶解。
Wetting of carbide ceramics (B4C, SiC, TiC and ZrC) by molten Ni was investigated by using an improved sessile drop method at 1753 K. Due to the partial metallic bonds in metallic ceramics (TiC and ZrC), the intrinsic wettability of them is better than the predominantly covalent ceramics (B4C and SiC). The smaller density of solid causes that the dissolution is more incline to the vertical direction, which also causes limited improvement of wettability. The final wettability for specific systems (Ni/carbide ceramic systems) is related to the dissolved solute from substrate, the recrystallized phases and the characteristics of interfacial structures. The spreading dynamics for the dissolutive wetting can be described by molecular dynamic model, and then the main energy barrier for the triple line motion may come from the dissolution.