Mechanical properties and thermal stability of carbon fiber cloth reinforced sol-derived mullite composites
Abstract For the wide application as thermal protection materials, it is very necessary for mullite ceramics to improve fracture toughness. In this paper, the laminated and stitched carbon fiber cloth preform reinforced mullite (C/mullite) composites were prepared through the route of sol impregnati...
Main Authors: | , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
SpringerOpen
2019-06-01
|
Series: | Journal of Advanced Ceramics |
Subjects: | |
Online Access: | http://link.springer.com/article/10.1007/s40145-018-0307-z |
id |
doaj-6878ce31dbdd4958841a6d26b63f0aeb |
---|---|
record_format |
Article |
spelling |
doaj-6878ce31dbdd4958841a6d26b63f0aeb2020-11-25T02:16:50ZengSpringerOpenJournal of Advanced Ceramics2226-41082227-85082019-06-018221822710.1007/s40145-018-0307-zMechanical properties and thermal stability of carbon fiber cloth reinforced sol-derived mullite compositesWei Zhang0Qingsong Ma1Kuanhong Zeng2Songlin Liang3Weiguo Mao4School of Materials Science and Engineering, Xiangtan UniversityScience and Technology on Advanced Ceramic Fibers & Composites Laboratory, National University of Defense TechnologyScience and Technology on Advanced Ceramic Fibers & Composites Laboratory, National University of Defense TechnologyScience and Technology on Advanced Ceramic Fibers & Composites Laboratory, National University of Defense TechnologySchool of Materials Science and Engineering, Xiangtan UniversityAbstract For the wide application as thermal protection materials, it is very necessary for mullite ceramics to improve fracture toughness. In this paper, the laminated and stitched carbon fiber cloth preform reinforced mullite (C/mullite) composites were prepared through the route of sol impregnation and heat treatment using the Al2O3—SiO2 sol with a high solid content as raw materials. The C/mullite composites showed a flexural strength of 228.9 MPa that was comparable to that of dense monolithic mullite although the total porosity reached 13.4%. Especially, a fracture toughness of 11.2 MPa·m1/2 that was 4–5 times that of dense monolithic mullite was obtained. Strength deterioration due to the carbothermal reduction between carbon fiber and the residual SiO2 in matrix was found above 1200 °C. A pyrolytic C (PyC) coating was deposited on carbon fibers as interfacial coating. The chemical damage to carbon fibers was obviously alleviated by the sacrifice of PyC coating. Accordingly, the C/PyC/mullite composites kept strength unchanged up to 1500 °C, and showed much higher strength retention ratio than C/mullite composites after annealing at 1600 °C.http://link.springer.com/article/10.1007/s40145-018-0307-zcarbon fiber reinforced mullite compositesolmechanical propertythermal stability |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Wei Zhang Qingsong Ma Kuanhong Zeng Songlin Liang Weiguo Mao |
spellingShingle |
Wei Zhang Qingsong Ma Kuanhong Zeng Songlin Liang Weiguo Mao Mechanical properties and thermal stability of carbon fiber cloth reinforced sol-derived mullite composites Journal of Advanced Ceramics carbon fiber reinforced mullite composite sol mechanical property thermal stability |
author_facet |
Wei Zhang Qingsong Ma Kuanhong Zeng Songlin Liang Weiguo Mao |
author_sort |
Wei Zhang |
title |
Mechanical properties and thermal stability of carbon fiber cloth reinforced sol-derived mullite composites |
title_short |
Mechanical properties and thermal stability of carbon fiber cloth reinforced sol-derived mullite composites |
title_full |
Mechanical properties and thermal stability of carbon fiber cloth reinforced sol-derived mullite composites |
title_fullStr |
Mechanical properties and thermal stability of carbon fiber cloth reinforced sol-derived mullite composites |
title_full_unstemmed |
Mechanical properties and thermal stability of carbon fiber cloth reinforced sol-derived mullite composites |
title_sort |
mechanical properties and thermal stability of carbon fiber cloth reinforced sol-derived mullite composites |
publisher |
SpringerOpen |
series |
Journal of Advanced Ceramics |
issn |
2226-4108 2227-8508 |
publishDate |
2019-06-01 |
description |
Abstract For the wide application as thermal protection materials, it is very necessary for mullite ceramics to improve fracture toughness. In this paper, the laminated and stitched carbon fiber cloth preform reinforced mullite (C/mullite) composites were prepared through the route of sol impregnation and heat treatment using the Al2O3—SiO2 sol with a high solid content as raw materials. The C/mullite composites showed a flexural strength of 228.9 MPa that was comparable to that of dense monolithic mullite although the total porosity reached 13.4%. Especially, a fracture toughness of 11.2 MPa·m1/2 that was 4–5 times that of dense monolithic mullite was obtained. Strength deterioration due to the carbothermal reduction between carbon fiber and the residual SiO2 in matrix was found above 1200 °C. A pyrolytic C (PyC) coating was deposited on carbon fibers as interfacial coating. The chemical damage to carbon fibers was obviously alleviated by the sacrifice of PyC coating. Accordingly, the C/PyC/mullite composites kept strength unchanged up to 1500 °C, and showed much higher strength retention ratio than C/mullite composites after annealing at 1600 °C. |
topic |
carbon fiber reinforced mullite composite sol mechanical property thermal stability |
url |
http://link.springer.com/article/10.1007/s40145-018-0307-z |
work_keys_str_mv |
AT weizhang mechanicalpropertiesandthermalstabilityofcarbonfiberclothreinforcedsolderivedmullitecomposites AT qingsongma mechanicalpropertiesandthermalstabilityofcarbonfiberclothreinforcedsolderivedmullitecomposites AT kuanhongzeng mechanicalpropertiesandthermalstabilityofcarbonfiberclothreinforcedsolderivedmullitecomposites AT songlinliang mechanicalpropertiesandthermalstabilityofcarbonfiberclothreinforcedsolderivedmullitecomposites AT weiguomao mechanicalpropertiesandthermalstabilityofcarbonfiberclothreinforcedsolderivedmullitecomposites |
_version_ |
1724888700975841280 |