TY - JOUR
T1 - Effect of enforcement content on strength/toughness of laminated SiCW/SiC ceramic composites
AU - Xie, Yupeng
AU - Cheng, Laifei
AU - Zhang, Litong
N1 - Publisher Copyright:
© 2016, BUAA Culture Media Group Ltd. All right reserved.
PY - 2016/12/1
Y1 - 2016/12/1
N2 - Laminated SiC whisker (SiCW)/SiC ceramic composites were fabricated by tape casting and chemical vapor infiltration (TC-CVI) process and the effect of SiCW content on the mechanical properties and microstructures of laminated ceramic composites was discussed. Strengthening/toughening mechanisms of laminated SiCW/SiC ceramic composites were investigated. The results indicate that TC-CVI process can effectively increase the content of whiskers (40vol%) in composites and reduce the damage to whiskers during fabrication process. Moreover, the fabricated laminated SiCW/SiC ceramic composites have appropriate interface bonding strength of interfacial and interlaminar. When SiCW content increases, both of the density and mechanical properties of the laminated ceramic composites can be significantly improved. The density, flexural strength and fracture toughness of laminated SiCW/SiC ceramic composites with 40vol% whisker are respectively 8.4%, 30.8% and 26.7% higher than those of laminated SiCW/SiC ceramic composites with 25vol% whisker. Interfacial and interlaminar crack deflection, and interfacial crack bridging and whisker pull-out can be observed in the fracture morphologies, which are main toughening mechanisms. Large content of SiCW and appropriate interface bonding strength between interfacial and interlaminar can obviously improve the strength and toughness of laminated SiCW/SiC ceramic composites together.
AB - Laminated SiC whisker (SiCW)/SiC ceramic composites were fabricated by tape casting and chemical vapor infiltration (TC-CVI) process and the effect of SiCW content on the mechanical properties and microstructures of laminated ceramic composites was discussed. Strengthening/toughening mechanisms of laminated SiCW/SiC ceramic composites were investigated. The results indicate that TC-CVI process can effectively increase the content of whiskers (40vol%) in composites and reduce the damage to whiskers during fabrication process. Moreover, the fabricated laminated SiCW/SiC ceramic composites have appropriate interface bonding strength of interfacial and interlaminar. When SiCW content increases, both of the density and mechanical properties of the laminated ceramic composites can be significantly improved. The density, flexural strength and fracture toughness of laminated SiCW/SiC ceramic composites with 40vol% whisker are respectively 8.4%, 30.8% and 26.7% higher than those of laminated SiCW/SiC ceramic composites with 25vol% whisker. Interfacial and interlaminar crack deflection, and interfacial crack bridging and whisker pull-out can be observed in the fracture morphologies, which are main toughening mechanisms. Large content of SiCW and appropriate interface bonding strength between interfacial and interlaminar can obviously improve the strength and toughness of laminated SiCW/SiC ceramic composites together.
KW - Ceramic matrix composites
KW - Chemical vapor infiltration
KW - Laminated composites
KW - Mechanical properties
KW - Microstructure
UR - http://www.scopus.com/inward/record.url?scp=85015263693&partnerID=8YFLogxK
U2 - 10.13801/j.cnki.fhclxb.20160224.002
DO - 10.13801/j.cnki.fhclxb.20160224.002
M3 - 文章
AN - SCOPUS:85015263693
SN - 1000-3851
VL - 33
SP - 2854
EP - 2859
JO - Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica
JF - Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica
IS - 12
ER -