当前位置: X-MOL 学术Int. J. Refract. Met. Hard Mater. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Preparation of bulk Cu-W interpenetrating-phase composites by liquid metal dealloying
International Journal of Refractory Metals & Hard Materials ( IF 3.6 ) Pub Date : 2021-02-27 , DOI: 10.1016/j.ijrmhm.2021.105503
Longfei Zeng , Chaoping You , Xuehui Zhang , Tongxiang Liang , Shu Miao , Baixiong Liu

Copper-Tungsten (Cu-W) composites are promising materials for electrical and thermal applications. Manufacturing the desired Cu-W composites with full densification and a homogenous microstructure remains difficult, however, owing to the lack of mutual solubility, poor wettability, and the large difference in melting temperature between W and Cu. Here, a fully dense homogenous bulk Cu-W composite with a three-dimensional bicontinuous interpenetrating-phase architecture is fabricated by liquid metal dealloying (LMD) method, which involves immersing the Ni-W alloy in a molten metal Cu bath. The microstructure evolution mechanisms and the dealloying kinetics from a Ni-W precursor alloy to Cu-W composite are investigated. The synthesized Cu-W composite structure showed morphology variations depending on the dealloying time. The coarsening mechanism of the W ligaments during dealloying were analyzed based on curvature-driven surface smoothening and Rayleigh instability controlled ligament pinch-off process.



中文翻译:

液态金属脱合金制备块状Cu-W互穿相复合材料

铜钨(Cu-W)复合材料是用于电气和热学应用的有前途的材料。然而,由于缺乏互溶性,差的润湿性以及钨和铜之间的熔融温度差异大,制造具有完全致密化和均匀的微观结构的所需铜钨复合材料仍然很困难。在这里,通过液态金属脱合金(LMD)方法制造具有三维双连续互穿相结构的全致密均质块状Cu-W复合材料,该方法包括将Ni-W合金浸入熔融金属Cu浴中。研究了从Ni-W前驱体合金到Cu-W复合材料的微观组织演化机理和脱合金动力学。合成的Cu-W复合结构根据脱合金时间表现出形态变化。

更新日期:2021-03-03
down
wechat
bug