Synthesis of self-helix structure Si₃N₄ nanobelts and its reinforcement effect on HA coating

ABSTRACT

A self-helix structure Si₃N₄ nanobelts reinforced hydroxyapatite (HSN/HA) coating has been synthesised on carbon/carbon composites by a combination method of catalyst-assisted pyrolysis of polymeric precursors and electrochemical deposition. The morphology, microstructure, and bonding strength of the coating were analysed. An individual Si₃N₄ nanobelt showed a self-helical shape. The bonding strength between HSN/HA coating and carbon/carbon composites reached 12.5 ± 0.72 MPa, higher than that of pure HA coating (6.38 ± 0.32 MPa). HSN/HA coating has the potential to apply to hard tissue substitution surgery in the future.

KEYWORDS:

• Si₃N₄ nanobelts
• hydroxyapatite
• electrodeposition
• bonding strength

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China under Grant Nos. [51872232 and 51821091], the Research Fund of the State Key Laboratory of Solidification Processing (NWPU), China [Grant No. 136-QP-2015] and “111” project of China [B08040].