Preparation and characterization of nanosized W-Cu powders by a novel solution combustion and hydrogen reduction method
Preparation and characterization of nanosized W-Cu powders by a novel solution combustion and hydrogen reduction method
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新型溶液燃烧和氢还原法制备纳米钨铜粉末并表征
DOI：
10.1016/j.jallcom.2019.04.163
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发表时间：
2019-07-15
影响因子：
6.2
通讯作者：
Gao, Dalu
中科院分区：
文献类型：
--
作者：
Zhu, Xi;Cheng, Jigui;Gao, Dalu
本文以偏钨酸铵、硝酸铜和硝酸铵为原料，开发了一种溶液燃烧结合氢还原法制备W-30Cu粉末的方法。结果表明，燃烧产物具有纳米晶和多孔结构，具有高比表面积。燃烧产物在700℃的氢气中可被完全还原，还原后的W-Cu复合粉末颗粒呈球形，平均粒径约为80 nm。还确定了系统中的反应机理。此外，所得W-Cu粉末表现出良好的烧结性能，W-Cu烧结样品具有细小的晶粒尺寸和良好的机械性能。烧结W-Cu试样的相对密度、显微硬度和导热系数分别达到98.6%、245.6 HV和223.55 W/(m·k)。 (C) 2019 年由 Elsevier B.V. 出版
In this paper, a novel solution combustion combined with hydrogen reduction was developed to prepare W-30Cu powders using ammonium metatungstate, copper nitrate and ammonium nitrate as raw materials. The results indicate that the combustion products own nanocrystalline and porous structure with high specific surface areas. The combustion products can be completely reduced in hydrogen gas at 700 degrees C and the reduced W-Cu composite powder particles have spherical shape with mean particles size of about 80 nm. The reaction mechanism in the system was also identified. Furthermore, the resultant W-Cu powders show good sinterability and the W-Cu sintered samples have fine grain size and good mechanical properties. Relative density, microhardness and thermal conductivity of the sintered W-Cu specimens reach 98.6%, 245.6 HV and 223.55 W/(m . k), respectively. (C) 2019 Published by Elsevier B.V.