Hydroxyapatite-Bioglass-Titanium Biomaterials Used as Dense Bulk in Double-layer Biomimetic Composite

材料科学技术（英文）, 2004, 20(5): 627-630.

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1.State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China

2.State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China

3.State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China

4.State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China Department of Chemistry, Jishou University, Jishou 416000, China

5.State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China

基金项目: 国家自然科学基金(50174059)

Hydroxyapatite-Bioglass-Titanium Biomaterials Used as Dense Bulk in Double-layer Biomimetic Composite

Keywords： Hydroxyapatite-Titanium (HA-Ti)

Sintering shrinkage, compressive strength, bending strength, chemical composition and their relationships with microstructure of HA-Ti and HA-BG-Ti biomaterials were studied. The results show that sintering shrinkage curve of HA-BG-Ti composite changes just like S shape (23.1%-16.2%-21.8%-17.1%) with increase of Ti content, and sintering shrinkage of HA-BG-Ti composite is always higher than that of HA-Ti composite. The approach also indicates that compressive strength and bending strength of HA-BG-Ti composite are always higher than that of HA-Ti composite. Basically, with its compressive strength and bending strength equaling to 211.5 MPa and 132.1 MPa respectively, HA-10 vol. pct BG-60 vol. pct Ti composite can meet the mechanical properties requirements of the outer dense bulk. Furthermore, microstructure analysis shows that interfacial integration of HA-BG-Ti composite is better than that of HA-Ti composite. From X-ray diffraction (XRD) and SEM-EDAX analysis, brittle new phases including calcium titanate and calcium carbonate are detected in HA-Ti composite. New phases in HA-Ti composite and complex strong binding force accompanied by elemental diffusion of Si, Ti in HA-BG-Ti composite can explain theoretically the great difference of mechanical properties of HA-Ti and HA-BG-Ti composites.

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Hydroxyapatite-Bioglass-Titanium Biomaterials Used as Dense Bulk in Double-layer Biomimetic Composite

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