Fabrication and properties of a dense SiC NWs-toughened alpha-Si3N4 composite coating on porous Si3N4 ceramics
Shangguan, Duandan1; Wang, Binglei1; Wang, Chao1; Zhang, Fan1; Bai, Yu1; Wang, Zhanjie1; Lu, Xuefeng2
2019-11-19
Source PublicationINTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
ISSN1546-542X
AbstractA dense SiC nanowires-toughened alpha-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 alpha-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 H-3/E-2 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 center dot m(1/2).
Keywordporous Si3N4 properties SiC NWs-toughened alpha-Si3N4 coating toughening mechanism
DOI10.1111/ijac.13419
Indexed BySCI
Language英语
Funding ProjectState Key Laboratory for Mechanical Behavior of Materials[20171905] ; Natural Science Foundation of Liaoning Province[20170520387]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
WOS IDWOS:000497075300001
PublisherWILEY
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/76292
Collection省部共建有色金属先进加工与再利用国家重点实验室
材料科学与工程学院
Corresponding AuthorWang, Chao
Affiliation1.Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Liaoning, Peoples R China
2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou, Gansu, Peoples R China
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Shangguan, Duandan,Wang, Binglei,Wang, Chao,et al. Fabrication and properties of a dense SiC NWs-toughened alpha-Si3N4 composite coating on porous Si3N4 ceramics[J]. INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY,2019.
APA Shangguan, Duandan.,Wang, Binglei.,Wang, Chao.,Zhang, Fan.,Bai, Yu.,...&Lu, Xuefeng.(2019).Fabrication and properties of a dense SiC NWs-toughened alpha-Si3N4 composite coating on porous Si3N4 ceramics.INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY.
MLA Shangguan, Duandan,et al."Fabrication and properties of a dense SiC NWs-toughened alpha-Si3N4 composite coating on porous Si3N4 ceramics".INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY (2019).
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