| Effect of specimen thickness on the creep deformation of a silica-based ceramic core material | |
| Li, Kaiwen1; Jiang, Weiguo1; Wang, Shaogang2; Xiao, Jiuhan1; Lou, Langhong1 | |
| Corresponding Author | Jiang, Weiguo(wgjiang@imr.ac.cn) |
| 2018-09-30 | |
| Source Publication | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| ISSN | 0925-8388 |
| Volume | 763Pages:781-790 |
| Abstract | In this study, the effect of the thickness of a silica-based ceramic core on its creep deformation, either in air or under vacuum, was studied. Specimens with different thicknesses after sintering were heated to 1550 degrees C and by maintaining the same temperature for 40, 70 or 100 min. Scanning electronic microscopy (SEM) was employed to observe the surface microstructures and fracture morphologies of the samples. X-ray diffraction (XRD) was used to characterize the phases that formed after creep deformation. The 3D distribution of micropores and the porosities of the specimens at different states were tested by X-ray computerized tomography (XCT). The experimental results show that the effect of the thickness of the specimen on the creep deformation was notably different under different atmospheres. The creep deformation of samples with the same thicknesses under vacuum atmosphere was clearly higher than the deformation in air. In air, the creep resistance was slightly affected by the thickness of the specimen. However, the creep deformation was significantly affected by the thickness of the specimen under vacuum. The creep resistance of the 4-mm-thick specimen is noticeably higher than that of the 0.5-mm-thick specimens. The creep rate of the 0.5-mm-thick specimen is linear with the porosity of the surface layer and higher compared to the 4-mm-thick specimen, which exhibited non-linear behaviour. Reactive micropores were formed on the surface layer of these specimens under vacuum. The volume fraction of the micropores increased with increasing creep time, which resulted in the different characterization of creep for specimens with different thicknesses under vacuum. (C) 2018 Published by Elsevier B.V. |
| Keyword | Ceramic core Creep Specimen thickness Cristobalite Porosity |
| Funding Organization | National Natural Science Foundation of China |
| DOI | 10.1016/j.jallcom.2018.05.253 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[51674235] |
| WOS Research Area | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000442484300090 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/129113 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Jiang, Weiguo |
| Affiliation | 1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China |
| Recommended Citation GB/T 7714 | Li, Kaiwen,Jiang, Weiguo,Wang, Shaogang,et al. Effect of specimen thickness on the creep deformation of a silica-based ceramic core material[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,763:781-790. |
| APA | Li, Kaiwen,Jiang, Weiguo,Wang, Shaogang,Xiao, Jiuhan,&Lou, Langhong.(2018).Effect of specimen thickness on the creep deformation of a silica-based ceramic core material.JOURNAL OF ALLOYS AND COMPOUNDS,763,781-790. |
| MLA | Li, Kaiwen,et al."Effect of specimen thickness on the creep deformation of a silica-based ceramic core material".JOURNAL OF ALLOYS AND COMPOUNDS 763(2018):781-790. |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment