Fabrication and properties of a dense SiC NWs-toughened α-Si3N4 composite coating on porous Si3N4 ceramics

doi:10.1111/ijac.13419

	Fabrication and properties of a dense SiC NWs-toughened α-Si3N4 composite coating on porous Si3N4 ceramics
	Shangguan, Duandan 2; Wang, Binglei 2; Wang, Chao 2; Zhang, Fan 2; Bai, Yu 2; Wang, Zhanjie 2; Lu, Xuefeng 1
刊名	International Journal of Applied Ceramic Technology
	2020-03-01
卷号	17 期号:2 页码:501-508
关键词	Aluminum coatings Aluminum compounds Aluminum metallography Composite coatings Fracture toughness Nanowires Silicon Silicon carbide Silicon compounds Vickers hardness Glass phase Mechanical damages Microstructures and properties porous Si3N4 properties SiC nanowire Toughening mechanisms Two-step technique
ISSN号	1546542X
DOI	10.1111/ijac.13419
英文摘要	A dense SiC nanowires-toughened α-Si3N4 coating was prepared using a two-step technique for protecting porous Si3N4 ceramic against mechanical damage, and effect of SiC nanowires content on microstructures and properties of the coating were investigated. XRD, SEM and TEM analysis results revealed that as-prepared coatings consisted of α-Si3N4, O'-Sialon, SiC nanowires and Y–Al–Si–O–N glass phase. Furthermore, Vickers hardness of the coated porous Si3N4 ceramics increased gradually with the increasing SiC nanowires content from 0 to 10 wt%, which is attributed to the gradual improvement in intrinsic elastic modulus (E), hardness (H) and H3/E2 of the coatings. But, when the SiC nanowires content was 15 wt%, the thickness of the coating became relatively thinner, so that its protective ability was weakened and Vickers hardness started to decrease accordingly. Meanwhile, the assistance of SiC nanowires enhanced fracture toughness of the coatings obviously because SiC nanowires in the coatings can produce various toughening mechanisms during mechanical damage. When the SiC nanowires content was 10 wt%, its fracture toughness reached the maximum value, which was 6.27 ± 0.05 MPa·m1/2. © 2019 The American Ceramic Society
WOS研究方向	Materials Science
语种	英语
出版者	Blackwell Publishing Ltd
WOS记录号	WOS:000497075300001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115406]
专题	材料科学与工程学院
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal, Lanzhou University of Technology, Lanzhou, China 2.School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, China;
推荐引用方式 GB/T 7714	Shangguan, Duandan,Wang, Binglei,Wang, Chao,et al. Fabrication and properties of a dense SiC NWs-toughened α-Si3N4 composite coating on porous Si3N4 ceramics[J]. International Journal of Applied Ceramic Technology,2020,17(2):501-508.
APA	Shangguan, Duandan.,Wang, Binglei.,Wang, Chao.,Zhang, Fan.,Bai, Yu.,...&Lu, Xuefeng.(2020).Fabrication and properties of a dense SiC NWs-toughened α-Si3N4 composite coating on porous Si3N4 ceramics.International Journal of Applied Ceramic Technology,17(2),501-508.
MLA	Shangguan, Duandan,et al."Fabrication and properties of a dense SiC NWs-toughened α-Si3N4 composite coating on porous Si3N4 ceramics".International Journal of Applied Ceramic Technology 17.2(2020):501-508.