Preparation and Properties of Carbon Fiber Reinforced BT-HA Composites

Abstract

Abstract: At present, the application of artificial bone is greatly limited due to its poor mechanical properties. Therefore, it has become a research interest to obtain the artificial bone with improved mechanical properties, while its original piezoelectric and biological properties are maintained. In this paper,in order to improve the mechanical properties of the composite while keeping the electrical properties unchanged, the carbon fiber/barium titanate-hydroxyapatite (C_f/BT-HA) composite was prepared by traditional solid-phase sintering method using barium titanate-hydroxyapatite (BT-HA) composite as matrix and carbon fiber (C_f) with 5% (mass fraction) as reinforcement.The results show that the electrical properties remain unchanged and the mechanical properties are greatly improved after adding C_f into the composite. The samples possess excellent ferroelectric properties, the piezoelectric constant d₃₃ is 37 pC/N, and the Curie temperature is 170 ℃, which is higher than the artificial bone service temperature. The bending strength is 121.7 MPa, and the hardness is 3.56 GPa, both of which are three times of the original. The fracture toughness is also doubled, reaching 1.21 MPa·m^1/2. C_f/BT-HA composites have no cytotoxicity and good osteoinduction. It is found that C_f/BT-HA composites would be a promising bone substitute material.

Key words: artificial bone, carbon fiber, barium titanate-hydroxyapatite composite, piezoelectric property, mechanical property, cytotoxicity, osteoinductivity

CLC Number:

WANG Ruanbin, CHENG Liqian, LU Jingtong, JIN Ruoqi, HE Mingzhe, YAN Shuhao, JIANG Damei, DENG Shijie, CHU Xiangcheng. Preparation and Properties of Carbon Fiber Reinforced BT-HA Composites[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(3): 994-1001.

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