SIC OpenIR
Enhanced mechanical properties of W-doped Nb4AlC3 ceramics
Cai, Ping1,2; He, Qiming2,3; Wu, Xishi1,2; Liu, Xuejian1; Liu, Yan1; Yin, Jie1; Huang, Yihua1; Huang, Zhengren1
2018
Source PublicationCeramics International
ISSN02728842
Volume44Issue:16Pages:19135-19142
AbstractThe W-doped Nb4AlC3 ceramics [(Nb1-xWx)4AlC3, x = 0–0.0375] were successfully fabricated by in-situ reactive hot-press-aided method using elemental niobium, aluminum, graphite and tungsten powders. The XRD results suggest that the matrix phase (Nb1-xWx)4AlC3 and the second phase (Nb1-xWx)C were simultaneously formed when W was added. The SEM images show that (Nb1-xWx)C is dispersed in the W-doped Nb4AlC3 ceramics matrix. The mechanical properties of Nb4AlC3 were greatly enhanced by W doping. Typically, the (Nb0.975W0.025)4AlC3 exhibits the highest flexural strength (483 ± 21 MPa), fracture toughness (8.5 ± 0.3 MPa⋅m1/2) and Young′s modulus (382 ± 18 GPa) at room temperature (RT), which are increased by 59%, 15% and 30%, respectively, compared with the present Nb4AlC3. The Vickers hardness of (Nb0.9625W0.0375)4AlC3 (4.8 ± 0.2 GPa) is 92% higher than that of Nb4AlC3. The (Nb0.975W0.025)4AlC3 also retains a high flexural strength of 344 ± 4 MPa at 1400 °C (71% of RT value), which is much higher than the RT flexural strength (303 ± 22 MPa) of the present Nb4AlC3. The strengthening effect is attributed to the solid solution of W and the incorporation of the second phase (Nb1-xWx)C. The excellent mechanical properties endow the W-doped Nb4AlC3 ceramics as promising high-temperature structural materials. © 2018
DOI10.1016/j.ceramint.2018.06.158
PublisherElsevier Ltd
EI KeywordsNiobium compounds
EI Classification Number603.1 Machine Tools, General - 812.1 Ceramics - 933 Solid State Physics - 951 Materials Science
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25196
Collection中国科学院上海硅酸盐研究所
Affiliation1.State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 201800, China;
2.University of Chinese Academy of Sciences, Beijing; 100049, China;
3.CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 201800, China
Recommended Citation
GB/T 7714
Cai, Ping,He, Qiming,Wu, Xishi,et al. Enhanced mechanical properties of W-doped Nb4AlC3 ceramics[J]. Ceramics International,2018,44(16):19135-19142.
APA Cai, Ping.,He, Qiming.,Wu, Xishi.,Liu, Xuejian.,Liu, Yan.,...&Huang, Zhengren.(2018).Enhanced mechanical properties of W-doped Nb4AlC3 ceramics.Ceramics International,44(16),19135-19142.
MLA Cai, Ping,et al."Enhanced mechanical properties of W-doped Nb4AlC3 ceramics".Ceramics International 44.16(2018):19135-19142.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Cai, Ping]'s Articles
[He, Qiming]'s Articles
[Wu, Xishi]'s Articles
Baidu academic
Similar articles in Baidu academic
[Cai, Ping]'s Articles
[He, Qiming]'s Articles
[Wu, Xishi]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Cai, Ping]'s Articles
[He, Qiming]'s Articles
[Wu, Xishi]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.