High entropy alloy: A promising matrix for high-performance tungsten heavy alloys
High entropy alloy: A promising matrix for high-performance tungsten heavy alloys
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DOI：
10.1016/j.jallcom.2018.11.089
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发表时间：
2019-03
影响因子：
6.2
通讯作者：
Shangcheng Zhou;Yaojian Liang;Yichao Zhu;Ruizhi Jian;Benpeng Wang;Yunfei Xue;Lu Wang;Fu-chi Wang
中科院分区：
文献类型：
--
作者：
Shangcheng Zhou;Yaojian Liang;Yichao Zhu;Ruizhi Jian;Benpeng Wang;Yunfei Xue;Lu Wang;Fu-chi Wang
高比重钨合金的性能与基体/钨的界面特性有关，而界面特性直接取决于基体材料对钨的润湿性。根据AlCrFeNiV系高熵合金（HEA）对多晶W的润湿行为，设计了一种新型的WHA。润湿实验表明，W/HEA体系在液相烧结（LPS）温度下具有较低的接触角，在HEA中具有中等的W溶解度，表现出溶解润湿性。这种有利的润湿行为有利于LPS过程中的致密化过程，导致清洁的基体/W界面具有高的结合强度，因此在所得的W/HEA复合材料中具有1132 MPa的高极限拉伸强度。这些结果表明，AlCrFeNiV系HEA是一种很有前途的WHA基体材料。
The performance of tungsten heavy alloys (WHAs) is related to the characteristic of matrix/W interfaces, which depends directly on the wettability of the matrix materials on W. This work designs a novel WHA that selects an AlCrFeNiV-system high entropy alloy (HEA) as matrix based on its wetting behavior on polycrystalline W. The wetting experiments show that this W/HEA system exhibits low contact angles at the temperatures for liquid phase sintering (LPS), and dissolutive wetting with a moderate W solubility in the HEA. This favorable wetting behavior benefits the densification process during LPS, leading to clean matrix/W interfaces with high bonding strength and hence a high ultimate tensile strength of 1132 MPa in the resulting W/HEA composite. These results indicate that the AlCrFeNiV-system HEA is a promising matrix material for WHAs.