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多孔生物镁的制备及其表面改性 被引量:10

Fabrication and Surface Modification on Biocompatible Porous Magnesium
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摘要 采用粉末冶金方法制备多孔镁,其孔隙率为20%~55%。通过碱热处理法对孔隙率为35%的多孔镁进行表面改性,以提高多孔镁在仿生体液中的耐腐蚀能力,并对碱处理和碱热处理后试样表面的沉积成分进行了测定。结果表明:多孔镁的孔隙率和孔径可以通过造孔剂的颗粒和含量来控制;通过碱热处理对多孔镁进行表面改性,未处理的多孔镁试样在仿生体液中浸泡7天后完全腐蚀,碱处理后的试样在仿生体液中浸泡10天后完全腐蚀,而经过碱热处理后的试样在仿生体液中浸泡14天后仍然保持原状,证明碱热处理可以显著提高多孔镁表面在仿生环境下的耐腐蚀性能。 Porous magnesium with the porosity of 20%-55% was fabricated by means of powder metallurgy method. The surface modification on porous magnesium (with the porosity 35%) was carried out to improve its corrosion resistance in simulated body fluid (SBF). The X-ray diffraction on the surface of porous magnesium was determined after alkali and alkali-heat treatments. The corrosion resistance of the samples was tested in SBF solution. The results indicate that the porosity and the pore size can be controlled by the spacer materials volume and size. Porous magnesium is corroded when soaking in SBF solution for 7 days and sample after alkali treatment for 10 days. The sample after alkali-heat treatment is not corroded when soaking in SBF solution for 14 days and the coating obtained by alkali-heat-treatment can effectively protect porous magnesium from corrosion in SBF solution.
机构地区 合肥工业大学
出处 《中国机械工程》 EI CAS CSCD 北大核心 2007年第10期1230-1235,共6页 China Mechanical Engineering
关键词 多孔镁 生物材料 表面改性 碱热处理 耐腐蚀性 porous magnesium biomaterial surface modification alkali - heat - treatment corrosion resistance
作者简介 沈剑,男,1979年生。合肥工业大学材料科学与工程学院硕士研究生。主要研究方向为多孔材料。发表论文5篇。 凤仪,男,1964年生。合肥工业大学材料科学与工程学院教授、博士研究生导师。 王松林,男,1973年生。合肥工业大学材料科学与工程学院硕士研究生。 徐屹,男,1981年生。合肥工业大学材料科学与工程学院硕士研究生。
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