TY - JOUR
T1 - Thermal and mechanical properties of SiC/SiC-CNTs composites fabricated by CVI combined with electrophoretic deposition
AU - Feng, Wei
AU - Zhang, Litong
AU - Liu, Yongsheng
AU - Li, Xiaoqiang
AU - Cheng, Laifei
AU - Chen, Bo
N1 - Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/2/25
Y1 - 2015/2/25
N2 - In order to improve the thermal and mechanical properties, CNTs were introduced into the matrix of SiC/SiC composites through electrophoretic deposition. Effect of the introduction of CNTs into CVI SiC/SiC composites was investigated. Microstructure, mechanical properties and thermal conductivity of SiC/SiC composites (SS) and SiC/SiC-CNTs composites (SSCS) were compared. Results indicated that matrix of SSCS presented a multi-layer morphology while that of SS showed a single-layer of SiC. Compared with SS, intra-bundle pores in SSCS were much smaller and fewer, which was accorded with the higher density (2.78±0.04g/cm3) and smaller porosity (5.8±0.3%). SSCS had a better performance in bending strength (484±16MPa) and damage tolerance (19.4±0.7MPam1/2) because of the pull out and crack bridging of CNTs. The thermal conductivity of SSCS was 1.74 times higher than that of SS. With the introduction of CNTs into CVI SiC/SiC composites, density, bending strength, damage tolerance and thermal conductivity were improved.
AB - In order to improve the thermal and mechanical properties, CNTs were introduced into the matrix of SiC/SiC composites through electrophoretic deposition. Effect of the introduction of CNTs into CVI SiC/SiC composites was investigated. Microstructure, mechanical properties and thermal conductivity of SiC/SiC composites (SS) and SiC/SiC-CNTs composites (SSCS) were compared. Results indicated that matrix of SSCS presented a multi-layer morphology while that of SS showed a single-layer of SiC. Compared with SS, intra-bundle pores in SSCS were much smaller and fewer, which was accorded with the higher density (2.78±0.04g/cm3) and smaller porosity (5.8±0.3%). SSCS had a better performance in bending strength (484±16MPa) and damage tolerance (19.4±0.7MPam1/2) because of the pull out and crack bridging of CNTs. The thermal conductivity of SSCS was 1.74 times higher than that of SS. With the introduction of CNTs into CVI SiC/SiC composites, density, bending strength, damage tolerance and thermal conductivity were improved.
KW - CNTs
KW - Mechanical properties
KW - SiC/SiC composite
KW - Thermal conductivity
UR - http://www.scopus.com/inward/record.url?scp=84928601984&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2014.12.105
DO - 10.1016/j.msea.2014.12.105
M3 - 文章
AN - SCOPUS:84928601984
SN - 0921-5093
VL - 626
SP - 500
EP - 504
JO - Materials Science and Engineering: A
JF - Materials Science and Engineering: A
ER -