TY - JOUR
T1 - Mechanical and electromagnetic shielding properties of SiCf/SiC composites fabricated by combined CVI and PIP process
AU - Mu, Yang
AU - Zhou, Wancheng
AU - Wang, Chao
AU - Luo, Fa
AU - Zhu, Dongmei
AU - Ding, Donghai
PY - 2014
Y1 - 2014
N2 - 2.5D KD-I SiCf/SiC composites were fabricated by combined chemical vapor infiltration (CVI) and precursor infiltration-pyrolysis (PIP) processes for electromagnetic interference (EMI) shielding applications. The effects of PyC interphase and Al2O3 filler on mechanical and EMI shielding properties of SiCf/SiC composites were studied. The PyC interphase effectively improves the accommodation of the fibers and matrix, and Al2O3 filler compensates for matrix shrinkage and acts as a strengthening phase to improve the capability of bearing force for the composites. Thus, the composites with PyC interphase and Al2O 3 filler possess the maximum flexural strength and fracture toughness with the values of 313 MPa and 12.7 MPa m1/2. Owing to the existence of excess carbon and PyC interphase, the composites also maintain the highest SET and SEA values of 30 and 20 dB, respectively, indicating its advantages as a kind of structural and functional materials. The superior SEA value is mainly attributed to the repeated reflection and dissipation of electromagnetic wave between the interfaces of PIP-SiC matrix and Al2O3 particles.
AB - 2.5D KD-I SiCf/SiC composites were fabricated by combined chemical vapor infiltration (CVI) and precursor infiltration-pyrolysis (PIP) processes for electromagnetic interference (EMI) shielding applications. The effects of PyC interphase and Al2O3 filler on mechanical and EMI shielding properties of SiCf/SiC composites were studied. The PyC interphase effectively improves the accommodation of the fibers and matrix, and Al2O3 filler compensates for matrix shrinkage and acts as a strengthening phase to improve the capability of bearing force for the composites. Thus, the composites with PyC interphase and Al2O 3 filler possess the maximum flexural strength and fracture toughness with the values of 313 MPa and 12.7 MPa m1/2. Owing to the existence of excess carbon and PyC interphase, the composites also maintain the highest SET and SEA values of 30 and 20 dB, respectively, indicating its advantages as a kind of structural and functional materials. The superior SEA value is mainly attributed to the repeated reflection and dissipation of electromagnetic wave between the interfaces of PIP-SiC matrix and Al2O3 particles.
KW - B. Composites
KW - C. Mechanical properties
KW - D. SiC
KW - EMI shielding application
UR - https://www.scopus.com/pages/publications/84900474439
U2 - 10.1016/j.ceramint.2014.02.103
DO - 10.1016/j.ceramint.2014.02.103
M3 - 文章
AN - SCOPUS:84900474439
SN - 0272-8842
VL - 40
SP - 10037
EP - 10041
JO - Ceramics International
JF - Ceramics International
IS - 7 PART A
ER -