热压烧结Al-Bi复合水反应材料组织与反应活性研究

蔡怀建; 宁先进; 于晓东; 赵修臣; 谭成文; 杨增林

doi:10.15980/j.tzzz.2022.11.024

研究·合金性能 | 浏览量 : 0 下载量: 18 CSCD: 0

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热压烧结Al-Bi复合水反应材料组织与反应活性研究
Microstructure and Water Reactivity of Hot Pressing Sintered Al-Bi Composite Water-reactive Materials
2022年42卷第11期页码：1434-1439
纸质出版日期： 2022 ，
DOI： 10.15980/j.tzzz.2022.11.024

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蔡怀建, 宁先进, 于晓东, 等. 热压烧结Al-Bi复合水反应材料组织与反应活性研究[J]. 特种铸造及有色合金, 2022,42(11):1434-1439.

Cai Huaijian, Ning Xianjin, Yu Xiaodong, et al. Microstructure and Water Reactivity of Hot Pressing Sintered Al-Bi Composite Water-reactive Materials[J]. Special Casting & Nonferrous Alloys, 2022,42(11):1434-1439.
蔡怀建, 宁先进, 于晓东, 等. 热压烧结Al-Bi复合水反应材料组织与反应活性研究[J]. 特种铸造及有色合金, 2022,42(11):1434-1439. DOI： 10.15980/j.tzzz.2022.11.024.

Cai Huaijian, Ning Xianjin, Yu Xiaodong, et al. Microstructure and Water Reactivity of Hot Pressing Sintered Al-Bi Composite Water-reactive Materials[J]. Special Casting & Nonferrous Alloys, 2022,42(11):1434-1439. DOI： 10.15980/j.tzzz.2022.11.024.

摘要

以Al和Bi的机械混合粉为原料，采用热压烧结法制备了Al-15Bi复合水反应材料，对其微观结构、水反应性能及反应产物进行了分析表征。探讨了温度和KCl浓度对Al-15Bi与水反应速率的影响，探究了Al-15Bi的水反应机理，建立了反应模型。结果表明，在550℃、40 MPa下保温保压1 h可制备出组织致密且均匀的Al-15Bi复合材料，其中Bi以网状分布在Al颗粒界面处；提高温度能大幅提高材料的制氢速率；Al与Bi在水中能形成微型原电池，从而促进Al与水的反应。

Abstract

Al-15 Bi composite water-reactive materials were prepared by hot pressing sintering with mechanically mixed powder of Al and Bi as raw materials. The microstructure

water-reactive properties and reaction products of the materials were analyzed and characterized. The effects of temperature and KCl concentration on the reaction rate between Al-15 Bi and water were analyzed

meanwhile the water reaction mechanism of Al-15 Bi was explored

and the reaction model was established. The results indicate that the Al-Bi composite material with dense and uniform structure can be prepared at 550 ℃ and 40 MPa for 1 h. Bi in the material is distributed in a network at the interface of Al particles. The hydrogen production rate can be improved greatly by increasing the temperature. Al and Bi can form micro-galvanic cells in water

thereby promoting the reaction of Al and water.