Study on Morphology and Chemical States of Surface Active Layer of Th-W Cathode

doi:10.3390/ma15082726

IMR OpenIR

	Study on Morphology and Chemical States of Surface Active Layer of Th-W Cathode
	Cheng, Yin 1,2; Sun, Yuan 1; Zhou, Yizhou 1; Wang, Shiyang 1; Meng, Jie 1; Cao, Nan 3; Shi, Wanpeng 4
通讯作者	Sun, Yuan(yuansun@imr.ac.cn) ; Zhou, Yizhou(yzzhou@imr.ac.cn)
	2022-04-01
发表期刊	MATERIALS
卷号	15 期号:8 页码:11
摘要	The surface morphology and chemical states of W-2%ThO2 thermionic cathode during vacuum high-temperature treatment were investigated in this research. The W-2%ThO2 thermionic cathode was prepared by a solid-liquid doping method combined with high-temperature sintering. The morphology and distribution of thorium oxide were observed using a transmission electron microscope and scanning electron microscope. The chemical states of elements at different temperatures were analyzed by X-ray photoelectron spectroscopy. Results indicate that the surface morphology and chemical form of the alloy evolve with the increase of temperature. The matrix had a lamellar structure at low temperatures, and the surface was relatively flat. The samples were heated to 500 degrees C, 1100 degrees C, and 1300 degrees C for 1 h. During the heating process, thorium oxide changed from granular to spherical, and the matrix was recrystallized. As the heating temperature rises, diffusion channels appear inside the cathode. As the temperature increases, the high-priced tungsten gradually decreases, and the zero-valent tungsten content increases. The adsorbed oxygen left the cathode surface, and the lattice oxygen increased. The surface oxygen content decreased, and the thorium and tungsten content increased.
关键词	thorium organization surface active layer chemical states
资助者	National Natural Science Foundation of China ; National Science and Technology Major Project ; Technology Foundation of China ; Industrialization Innovation Team of the Industrial Technology Research Institute of the Chinese Academy of Sciences in Foshan
DOI	10.3390/ma15082726
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51801206] ; National Science and Technology Major Project[J2019-VI-0018-0133] ; Technology Foundation of China ; Industrialization Innovation Team of the Industrial Technology Research Institute of the Chinese Academy of Sciences in Foshan[ZK-TD-2019-04] ; [2021JH15]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000786151800001
出版者	MDPI
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/172690
专题	中国科学院金属研究所
通讯作者	Sun, Yuan; Zhou, Yizhou
作者单位	1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Liaoning Zhongke Boyan Technol Co, Shenyang 113122, Peoples R China 4.Foshan Huizhen Technol Co, Foshan 528251, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Yin,Sun, Yuan,Zhou, Yizhou,et al. Study on Morphology and Chemical States of Surface Active Layer of Th-W Cathode[J]. MATERIALS,2022,15(8):11.
APA	Cheng, Yin.,Sun, Yuan.,Zhou, Yizhou.,Wang, Shiyang.,Meng, Jie.,...&Shi, Wanpeng.(2022).Study on Morphology and Chemical States of Surface Active Layer of Th-W Cathode.MATERIALS,15(8),11.
MLA	Cheng, Yin,et al."Study on Morphology and Chemical States of Surface Active Layer of Th-W Cathode".MATERIALS 15.8(2022):11.