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Appl. Sci. 2017, 7(4), 387; doi:10.3390/app7040387

Mechanically Strong CaSiO3 Scaffolds Incorporating B2O3-ZnO Liquid Phase

1
State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China
2
State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China
3
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China
4
Key Laboratory of Carcinogenesis of the Chinese Ministry of Health, Xiangya Hospital, Central South University, Changsha 410083, China
5
College of Chemistry, Xiangtan University, Xiangtan 411105, China
6
Health Management Center, Xiangya Hospital, Central South University, Changsha 410008, China
7
Human Reproduction Center, Shenzhen Hospital of Hongkong University, Shenzhen 518053, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Peter Van Puyvelde
Received: 7 March 2017 / Revised: 6 April 2017 / Accepted: 11 April 2017 / Published: 13 April 2017
(This article belongs to the Special Issue Materials for 3D Printing)
View Full-Text   |   Download PDF [3355 KB, uploaded 13 April 2017]   |  

Abstract

Calcium silicate (CaSiO3) scaffolds were reinforced by introducing liquid phase. The liquid phase was made of B2O3 and ZnO. The fracture toughness and compressive strength increased by 48% and 141%, respectively, compared with those of the scaffolds without the liquid phase. This was attributed to the enhanced densification, the elongated grains pull-out and the cracks bridging. In addition, because of its increasing mechanical properties, the fracture model of the cleavage fracture was more beneficial than the intergranular fracture. The mechanical properties of the scaffolds with the liquid phase could be steadily maintained and then they decreased slowly when immersed in simulated body fluid (SBF). Meanwhile, the hydroxyapatite (HAp) generated on their surfaces. In addition, the scaffolds possessed favorable biocompatibility and could promote cell proliferation. These results demonstrated that the scaffolds with B2O3-ZnO liquid phase are a promising substitute for bone repair applications. View Full-Text
Keywords: CaSiO3 scaffolds; liquid phase; selective laser sintering; mechanical properties CaSiO3 scaffolds; liquid phase; selective laser sintering; mechanical properties
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Shuai, C.; Duan, S.; Gao, D.; Wu, P.; Gao, C.; Yang, Y.; Liu, L.; Yuan, F.; Yang, S.; Feng, P. Mechanically Strong CaSiO3 Scaffolds Incorporating B2O3-ZnO Liquid Phase. Appl. Sci. 2017, 7, 387.

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