TY - JOUR
T1 - Microstructure and mechanical properties of ultrafine bamboo-shaped SiC rod-reinforced HfC ceramic coating
AU - Chu, Yanhui
AU - Li, Hejun
AU - Wang, Yongjie
AU - Qi, Lehua
AU - Fu, Qiangang
PY - 2013/11/25
Y1 - 2013/11/25
N2 - Ultrafine bamboo-shaped SiC rod-reinforced HfC ceramic coating was fabricated on carbon/carbon (C/C) composites by a simple method, which consists of first fabricating a porous layer with ultrafine bamboo-shaped SiC rods on C/C composites and then depositing HfC ceramic into the porous layer using a two-step chemical vapor deposition technique. The ultrafine bamboo-shaped SiC rods could be well dispersed in the coating, which significantly improved the mechanical properties of the coating and the bonding strength between C/C composites and coating, avoiding the cracking and debonding of the coating. The results showed that the hardness, elastic modulus, and fracture toughness of the coating increased by 21%, 42%, and 106%, respectively, and the bonding strength between C/C composites and coating increased by 30 times due to the incorporation of the ultrafine bamboo-shaped SiC rods. Most interestingly, a novel reinforcing and toughening mechanism is observed that sho. ws the ultrafine bamboo-shaped SiC rods anchoring themselves into the ceramic matrix to effectively transfer load from the matrix to the rods by the mechanical interlocking between the nodes and the surrounding matrix.
AB - Ultrafine bamboo-shaped SiC rod-reinforced HfC ceramic coating was fabricated on carbon/carbon (C/C) composites by a simple method, which consists of first fabricating a porous layer with ultrafine bamboo-shaped SiC rods on C/C composites and then depositing HfC ceramic into the porous layer using a two-step chemical vapor deposition technique. The ultrafine bamboo-shaped SiC rods could be well dispersed in the coating, which significantly improved the mechanical properties of the coating and the bonding strength between C/C composites and coating, avoiding the cracking and debonding of the coating. The results showed that the hardness, elastic modulus, and fracture toughness of the coating increased by 21%, 42%, and 106%, respectively, and the bonding strength between C/C composites and coating increased by 30 times due to the incorporation of the ultrafine bamboo-shaped SiC rods. Most interestingly, a novel reinforcing and toughening mechanism is observed that sho. ws the ultrafine bamboo-shaped SiC rods anchoring themselves into the ceramic matrix to effectively transfer load from the matrix to the rods by the mechanical interlocking between the nodes and the surrounding matrix.
KW - Ceramic-matrix composites (CMCs)
KW - Chemical vapor deposition (CVD)
KW - Interfacial strength
KW - Mechanical properties
UR - http://www.scopus.com/inward/record.url?scp=84886287531&partnerID=8YFLogxK
U2 - 10.1016/j.surfcoat.2013.08.028
DO - 10.1016/j.surfcoat.2013.08.028
M3 - 文章
AN - SCOPUS:84886287531
SN - 0257-8972
VL - 235
SP - 577
EP - 581
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
ER -