Microstructure and mechanical properties of biphasic calcium phosphate composites toughened by graphene nanoplate with different dispersant

作者：Zhao Yan; Bi Jian Qiang; Cheng Fu Ming; Liu Yi; Sun Kang Ning^*

来源：Journal of Synthetic Crystals, 2013, 42(5): 927-932.

• Biphasic calcium phosphates
• Cetyltrimethylammonium bromide
• Graphene nanoplatelets
• Microstructure and mechanical properties
• Nano powders
• Nanoplatelet
• Observation of microstructures
• Toughening effects

Biphasic calcium phosphate (BCP) composites reinforced by graphene nanoplatelets (GNPs) were prepared by hot pressing with different dispersant. Based on in-depth mechanical test and observation of microstructure, the influence of dispersant and GNPs on BCP matrix was investigated. When cetyltrimethylammonium bromide (CTAB) was employed as the dispersant, the BCP nanopowders can be attracted to the GNPs surface owing to electrostatic interaction. The composite containing 1.5 wt% GNPs exhibited the maximun bending strength and fracture toughness of 152 MPa and 1.74 MPa&middotm1/2, about 55% and 76% higher than those of monolithic BCP, respectively. The addition of GNPs in BCP ceramics produce obvious strengthening and toughening effect.

• 出版日期2013