Fabrication, mechanical properties and thermal shock resistance of a dense SiC NWs/α-Si3N4 composite coating for protecting porous Si3N4 ceramics | |
Wang, Binglei1; Shangguan, Duandan1; Qiao, Ruiqing1; Zhang, Fan1; Bai, Yu1; Wang, Zhanjie1; Wang, Chao1; Lu, Xuefeng2 | |
刊名 | Ceramics International |
2019-12-01 | |
卷号 | 45期号:17页码:23241-23247 |
关键词 | Ability testing Composite coatings Cracks Fabrication Mechanical properties Mechanisms Shock testing Silicon Silicon carbide Sintering Thermal shock Water absorption Critical crack size Extreme conditions Interfacial bonding Liquid infiltration method Porous Si3N4 ceramic Thermal shock resistance Toughening effects Toughening mechanisms |
ISSN号 | 02728842 |
DOI | 10.1016/j.ceramint.2019.08.020 |
英文摘要 | To prevent porous Si3N4 ceramics from absorbing moisture in practical application, a dense SiC NWs/α-Si3N4 composite coating was fabricated using the two-step technology involving slurry and liquid infiltration method. The results revealed that the SiC NWs not only can promote densification sintering of the coating but also can reduce thickness of the coating effectively due to the block effect of the SiC NWs. Furthermore, the SiC NWs in the coating had a good interfacial bonding with α-Si3N4 matrix, meanwhile the toughening effects of the SiC NWs involving crack deflection, crack branching, SiC NWs bridging and pullout, also presented during mechanical damage. The strengthening and toughening mechanisms of the SiC NWs not only enhanced mechanical properties of the coating but also raised significantly critical crack size (L), thereby which made the coating have a good ability for thermal shock resistance. After thermal shock at ΔT = 1000 °C for 15 times, water absorption of the coated porous Si3N4 ceramics increased only to 7.21% from 4.54%, and its residual strength ratio was up to 83.4%. More importantly, the coating exhibited an ability for crack healing during thermal shock testing. All those above results indicated that as-prepared SiC NWs/α-Si3N4 composite coating can meet the applied requirements in long-term extreme conditions. © 2019 Elsevier Ltd and Techna Group S.r.l. |
WOS研究方向 | Materials Science |
语种 | 英语 |
出版者 | Elsevier Ltd |
WOS记录号 | WOS:000493217800102 |
内容类型 | 期刊论文 |
源URL | [http://ir.lut.edu.cn/handle/2XXMBERH/114270] |
专题 | 材料科学与工程学院 |
作者单位 | 1.School of Materials Science and Engineering, Shenyang University of Technology, Shenyang; 110870, China; 2.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal, Lanzhou University of Technology, Lanzhou; 730050, China |
推荐引用方式 GB/T 7714 | Wang, Binglei,Shangguan, Duandan,Qiao, Ruiqing,et al. Fabrication, mechanical properties and thermal shock resistance of a dense SiC NWs/α-Si3N4 composite coating for protecting porous Si3N4 ceramics[J]. Ceramics International,2019,45(17):23241-23247. |
APA | Wang, Binglei.,Shangguan, Duandan.,Qiao, Ruiqing.,Zhang, Fan.,Bai, Yu.,...&Lu, Xuefeng.(2019).Fabrication, mechanical properties and thermal shock resistance of a dense SiC NWs/α-Si3N4 composite coating for protecting porous Si3N4 ceramics.Ceramics International,45(17),23241-23247. |
MLA | Wang, Binglei,et al."Fabrication, mechanical properties and thermal shock resistance of a dense SiC NWs/α-Si3N4 composite coating for protecting porous Si3N4 ceramics".Ceramics International 45.17(2019):23241-23247. |
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