摘要:
以具有抗菌性的银作为合金化元素,以碳酸氢铵作为造孔剂,应用粉末冶金的方法制备出不同银含量的多孔钛银合金,并应用称重法、带能谱的扫描电子显微镜、X射线衍射仪、万能力学试验机等研究了银含量对多孔钛微观结构和力学性能的影响。结果表明:银的添加量为3%时,多孔钛的孔隙率从65.18%升高到68.25%,多孔钛银合金的抗压强度和弹性模量均增加。进一步增加银的含量到10%时,多孔钛银合金的孔隙率保持在68%左右,其抗压强度和弹性模量变化较小。银的加入对多孔钛的孔结构无明显影响,其相成分主要为α-Ti。多孔钛银合金具有良好的孔结构和力学性能,有潜力用作抗菌骨科植入材料用于松质骨缺损修复。
Abstract:
Using antibacterial silver as the alloying element and ammonium bicarbonate as the pore-forming agent respectively,porous titanium-silver alloys（Ti-Ag alloys） with different silver contents were prepared by powder metallurgy method.The effects of silver content on microstructure and mechanical properties of the porous titanium were investigated by weighing,SEM-EDS,XRD and universal mechanical testing machine.The results show that the porosity of Ti-Ag alloy increases from 65. 18% to 68. 25% when adding 3% of silver,with both of the compressive strength and elastic modulus for porous Ti-Ag alloy increased.When the content of silver is further increased to 10%,the porosity of Ti-Ag alloy keeps at about 68%,and the compressive strength and elastic modulus change little.The addition of silver has no obvious effect on pore structure of the porous Ti-Ag alloy,and its phase composition is mainly α-Ti.Porous Ti-Ag alloy has good pore structure and mechanical properties,owning the potential as an antibacterial orthopedic implant material for cancellous bone defect repair.
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