TY - JOUR
T1 - The effects of CVD SiC interphase on mechanical properties of KD-1 SiC fiber reinforced aluminum phosphate composites
AU - Ding, Donghai
AU - Zhou, Wancheng
AU - Luo, Fa
AU - Mu, Yang
AU - Zhu, Dongmei
PY - 2012/2/1
Y1 - 2012/2/1
N2 - The KD-1 SiC fiber reinforced aluminum phosphate (SiC/Al(PO3)3) composites were fabricated by the method of vacuum infiltration and heat treatment using Al(H2PO4)3 as precursor. The major phases of matrix are cubic Al(PO3)3 and monoclinic Al2P6O18. The KD-1 SiC fibers are degraded by the water vapor released from Al(H2PO4)3. In order to protect the KD-1 SiC fibers, the CVD SiC are coated on fibers before infiltration of aluminum phosphate. It was found that the flexural strength of composites enhances as increasing of CVD SiC thickness, but the fracture behavior exhibits brittle rupture when the interphase is too thick. The thickness of CVD SiC interphase is optimized as 1.5μm from the mechanical properties point of view. In addition, the effects of heat treatment in air on mechanical properties of SiC/Al(PO3)3 composites were researched. The retentions of flexural strength of SiC/Al(PO3)3 composites with 1.5μm CVD SiC interphase after heat treatment in air at 800, 900, 1000°C for 6h are 90.3%, 70.9% and 67.20%, respectively.
AB - The KD-1 SiC fiber reinforced aluminum phosphate (SiC/Al(PO3)3) composites were fabricated by the method of vacuum infiltration and heat treatment using Al(H2PO4)3 as precursor. The major phases of matrix are cubic Al(PO3)3 and monoclinic Al2P6O18. The KD-1 SiC fibers are degraded by the water vapor released from Al(H2PO4)3. In order to protect the KD-1 SiC fibers, the CVD SiC are coated on fibers before infiltration of aluminum phosphate. It was found that the flexural strength of composites enhances as increasing of CVD SiC thickness, but the fracture behavior exhibits brittle rupture when the interphase is too thick. The thickness of CVD SiC interphase is optimized as 1.5μm from the mechanical properties point of view. In addition, the effects of heat treatment in air on mechanical properties of SiC/Al(PO3)3 composites were researched. The retentions of flexural strength of SiC/Al(PO3)3 composites with 1.5μm CVD SiC interphase after heat treatment in air at 800, 900, 1000°C for 6h are 90.3%, 70.9% and 67.20%, respectively.
KW - Aluminum phosphate
KW - CVD SiC interphase
KW - Mechanical properties
KW - SiC fibers
UR - http://www.scopus.com/inward/record.url?scp=84856540650&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2011.11.079
DO - 10.1016/j.msea.2011.11.079
M3 - 文章
AN - SCOPUS:84856540650
SN - 0921-5093
VL - 534
SP - 347
EP - 352
JO - Materials Science and Engineering: A
JF - Materials Science and Engineering: A
ER -