Institutional Repository of Coll Mat Sci & Engn
| Effects of Al2O3 coating induced structural and mechanical changes of C/C composites | |
Jia, Jiangang1,2 ; Zhang, Bo1; Liu, Diqiang1; Liu, Shunwei1; Ji, Genshun2; Ji, Ruifang1
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| 2020-03-25 | |
| Source Publication | JOURNAL OF ALLOYS AND COMPOUNDS
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| ISSN | 0925-8388 |
| Volume | 818 |
| Abstract | Different C/C composites, identified as C-f/C, C-Al2O3/C, C-1600/C and C1600-Al2O3/C, were fabricated by condensation of different treated 3D needle-punched carbon fiber preforms through a thermal gradient chemical vapor infiltration (TG-CVI) method. Effects of high temperature treatment and Al2O3 coating of the carbon fiber preforms on matrix texture and mechanical properties of C/C composites were investigated. SL PyC is obtained for C-f/C and C-1600/C, which preforms are without Al2O3 coating. Whereas the texture of carbon matrix for C-Al2O3/C, and C1600-Al2O3/C changes to RL under the same deposition conditions, indicating that Al2O3 coating layer significantly affects the texture of carbon matrix. Heat treatment of the carbon fiber preforms at 1600 degrees C for 4 h obviously increase the toughness of the C/C composites. The fracture toughness increased by 226% from 0.938 MPa/m(2) for C-f/C to 3.061 MPa/m(2) for C1600-Al2O3/C. The significant toughness increasing is attributed to the unique fracture mode for C1600-Al2O3/C, where a hollow "cylindrical" PyC matrix is pulled out and a corresponding big hole is left with a central fiber in it. The flexural strength, however, is mainly affected by the final density of the C/C composites. (C) 2019 Elsevier B.V. All rights reserved. |
| Keyword | C/C composites Interface coating layer Al2O3 Matrix texture Fracture toughness |
| DOI | 10.1016/j.jallcom.2019.152847 |
| Indexed By | SCI ; SCIE |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[51461029] ; Gansu Province science and technology major projects[1602GKDD012] |
| WOS Research Area | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000506166900046 |
| Publisher | ELSEVIER SCIENCE SA |
| EI Accession Number | 20194807738940 |
| EI Keywords | Fracture toughness |
| EI Classification Number | 415.4 Structural Materials Other Than Metal, Plastics or Wood - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 813.1 Coating Techniques - 813.2 Coating Materials |
| Source library | WOS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://ir.lut.edu.cn/handle/2XXMBERH/64142 |
| Collection | 材料科学与工程学院 |
| Corresponding Author | Jia, Jiangang |
| Affiliation | 1.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China; 2.State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China |
| First Author Affilication | Coll Mat Sci & Engn |
| Corresponding Author Affilication | Coll Mat Sci & Engn |
| First Signature Affilication | Coll Mat Sci & Engn |
| Recommended Citation GB/T 7714 | Jia, Jiangang,Zhang, Bo,Liu, Diqiang,et al. Effects of Al2O3 coating induced structural and mechanical changes of C/C composites[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,818. |
| APA | Jia, Jiangang,Zhang, Bo,Liu, Diqiang,Liu, Shunwei,Ji, Genshun,&Ji, Ruifang.(2020).Effects of Al2O3 coating induced structural and mechanical changes of C/C composites.JOURNAL OF ALLOYS AND COMPOUNDS,818. |
| MLA | Jia, Jiangang,et al."Effects of Al2O3 coating induced structural and mechanical changes of C/C composites".JOURNAL OF ALLOYS AND COMPOUNDS 818(2020). |
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