Embedded ZrC-SiC nanocomposites from hydrothermal precursor with temperature-dependent oxidation resistance and high sinterability

doi:10.1016/j.jallcom.2019.03.299

	Embedded ZrC-SiC nanocomposites from hydrothermal precursor with temperature-dependent oxidation resistance and high sinterability
	Xu, Wentao 3; Zhou, Youfu 3; Lin, He 3; Lu, Shuai 1,3; Ling, Junrong 1,3; Wang, Rui 1,3; Wang, Zhiguang4 ; Wang, Kun 2
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2019-06-30
卷号	791 页码:316-327
关键词	ZrC-SiC nanocomposite Hydrothermal precursor Oxidation resistance Embedded morphology Spark plasma sintering
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2019.03.299
通讯作者	Zhou, Youfu(yfzhou@fjirsm.ac.cn)
英文摘要	ZrC-SiC nanocomposites were synthesized via a facile, green hydrothermal precursor conversion method. The zirconium, silicon and decomposed glucose can be successfully incorporated into a homogeneous framework. In subsequent pyrolysis, the precursor transforms to a core-matrix structure of the nanoZrO(2) and amorphous carbon/silica mixture, resulting in a short diffusion path and limited grain growth. Carbide first appears at a low temperature of 1200 degrees C, and the conversion is completed at 1500 degrees C with low oxygen content. The composite consists of grains about 100 nm, exhibiting specific embedded morphology, and has different oxidation resistance in three temperature zones based on the component. The origin mechanism and properties have been elucidated and analyzed. The present work demonstrates the effectiveness of hydrothermal chemistry for the synthesis of carbide composites and their promising application in high temperature protection. Such nanocomposites with controllable morphology and high sinterability beneficial for subsequent densification are also verified. The additive free ceramic has been obtained with almost fully density (relative density >99%) at a low temperature of 1700 degrees C by spark plasma sintering (SPS). The sintered specimen possesses fine microstructure with hierarchical grain size distribution (about 1 mu m and 100 nm, respectively) and good mechanical properties (fracture toughness of 4.3 +/- 0.4 MPa m(1/2) and Vickers hardness of 22.8 +/- 0.7 GPa). (C) 2019 Published by Elsevier B.V.
资助项目	CAS Priority Research program[XDA21010204] ; CAS Priority Research program[XDB20010300] ; National Natural Science Foundation of China[201501178] ; Natural Science Foundation of Fujian Province[2017H0048]
WOS关键词	IN-SITU SYNTHESIS ; MECHANICAL-PROPERTIES ; ZIRCONIUM CARBIDE ; SINTERING KINETICS ; SOL-GEL ; CERAMICS ; MICROSTRUCTURE ; COMPOSITE ; REDUCTION ; POWDERS
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000465282500035
资助机构	CAS Priority Research program ; National Natural Science Foundation of China ; Natural Science Foundation of Fujian Province
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/133882]
专题	中国科学院近代物理研究所
通讯作者	Zhou, Youfu
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Peoples R China 3.Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Optoelect Mat Chem & Phys, Fuzhou 350002, Fujian, Peoples R China 4.Chinese Acad Sci, Inst Modern Phys, Lanzhou 73000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Xu, Wentao,Zhou, Youfu,Lin, He,et al. Embedded ZrC-SiC nanocomposites from hydrothermal precursor with temperature-dependent oxidation resistance and high sinterability[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,791:316-327.
APA	Xu, Wentao.,Zhou, Youfu.,Lin, He.,Lu, Shuai.,Ling, Junrong.,...&Wang, Kun.(2019).Embedded ZrC-SiC nanocomposites from hydrothermal precursor with temperature-dependent oxidation resistance and high sinterability.JOURNAL OF ALLOYS AND COMPOUNDS,791,316-327.
MLA	Xu, Wentao,et al."Embedded ZrC-SiC nanocomposites from hydrothermal precursor with temperature-dependent oxidation resistance and high sinterability".JOURNAL OF ALLOYS AND COMPOUNDS 791(2019):316-327.