多孔生物镁的制备与力学性能研究

Processing of Biocompatible Porous Magnesium and Study on its Mechanical Property

采用粉末冶金法制备多孔镁,孔隙率可在20%到55%范围内变化,并研究了多孔镁的压缩性能和抗弯强度与孔隙率之间的关系。结果表明,多孔镁的孔隙率、孔径可通过造孔剂的含量和粒度来控制,随着孔隙率的增加,抗压强度和杨氏模量变小,抗弯强度下降;采用粉末冶金方法制备的多孔生物镁不论是从压缩强度,杨氏模量还是从抗弯强度上来讲,都可以满足移植材料的要求。

Porous magnesium with the porosity of 20% -55% were fabricated by means of powder metallurgy method. The effects of the porosity on the Young＇ s modulus, strength and average plateau stress were investigated by compressive tests. Results indicate that the porosity and pore size of porous magnesium can be controlled by spacer materials volume and size. The Young＇s modulus, the collapse stress, the average plateau stress and the bend intensity all decrease with the increase of porosity. The porous material has exceptional characteristics. The mechanical properties of the porous magnesium are in a range of those of cancellous bone. Therefore, the porous magnesium can be regarded as one of promising scaffold materials for embedded application.