Wetting of ZnO-ceramic with alloys of the silver-copper system in vacuum

Author:

Durov O. V., ,Poluyanska V. V.,Stetsyuk T. V., ,

Abstract

Zinc oxide is a wide-gap semiconductor with unique properties, used for the manufacture of catalysts, electrodes, transistors, etc. In these applications, there is a need for metallization and joining of ZnO-based materials, using of molten metal filler is an effective method. Contact of zinc oxide and liquid metals is almost not studied in comparison to other oxide materials. In this work the wetting of zinc oxide based ceramic with metal melts of the silver-copper system in high vacuum was studied. Alloys with concentration of copper (% (at.)) 0 (pure silver), 5, 10, 20, 30, 39, 100 (pure copper) were used. Increasing the concentration of copper in the silver-copper melts significantly improves the wetting of ZnO-ceramic with these liquids, the contact angles decrease from 137° for the pure silver to 28° for the pure copper. Investigations of the microstructure show presence of relatively thin transition layers on the interfaces for silver-copper alloys, for the pure copper case the interface has complex “island-like” microstructure. Also a ruination of ZnO-ceramic substrates due to an interaction with metal melt was noted, the higher copper concentration, the more intensive ruination. Also some signs of the presence of zinc in the metal drops solidified on the zinc oxide surface were revealed, such as, intensive oxidation of the drops in air at room temperature. The oxidation shows complex multiphase microstructure of the solidified drops. After wetting of the zinc oxide with pure copper the solidified metal has microstructure of brass (Cu—Zn alloy) with low zinc concentration. The effects observed can be explained by sublimation of the zinc oxide under experimental conditions (high temperatures, vacuum) with formation of gaseous products (oxygen and vapor of zinc), which subsequently dissolve in silver-copper liquid drops. In particular, the dissolution of oxygen in the Ag—Cu melt improves its wetting of surfaces of solid oxides and presence of zinc in solidified drops provides its oxidization in air. Keywords: zinc oxide, wetting with metals, contact interaction, microstructure, transition layer.

Publisher

National Academy of Sciences of Ukraine (Co. LTD Ukrinformnauka) (Publications)

Reference20 articles.

1. 1. Morkoc, H., Ozgur, U. (2008). Zinc oxide: fundamentals, materials and device technology. John Wiley & Sons, 488 р.

2. 2. Ozgur, U., Alivov, Y. I., Liu, C., Teke, A., Reshchikov, M. A., Dogan, S., Avrutin, V., Cho, S.-J., Morkoc, H. A. (2005). Сomprehensive review of ZnO materials and devices. J. Appl. Phys., Vol. 98, is. 4 (041301), pp. 1-103.

3. 3. Nikolayeva, N. S. (2012). Ag melt wetting of ZnO based ceramics. IX Rossiyskaya yezhegodnaya konf. molodykh nauchnykh sotrudnikov i aspirantov "Fiziko-khimiya i tekhnologiya neorganicheskikh materialov", Sbornik materialov, Moskva: IMET RAN, 395 p. [in Russian].

4. 4. Jiangyan, Wang, Hansen, Wang, Jin, Xie, Ankun, Yang, Allen, Pei, Chun-Lan, Wu, Feifei, Shi, Yayuan, Liu, Dingchang, Lin, Yongji, Gong, Yi, Cui (2018). Fundamental study on the wetting property of liquid lithium. Energy Storage Mater., No. 14, pp. 345-350.

5. Brass formation in a copper/zinc oxide CO shift catalyst;Herwijnen;J Catalysis Vol 34 No 2,1974

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3