中文摘要：

采用粉末冶金模压烧结技术制备了Ti-（2～20）Fe二元合金，探讨了Fe含量对合金的力学性能及耐腐蚀性能的影响，并与铸造cPTi和Ti-6A1-4V合金的耐腐蚀性能进行了对比。结果表明，随着Fe含量的增加，合金a相含量逐渐降低，卢相含量逐渐提高。当Fe含量达到20％时，基本形成单一卢相合金。随Fe含量的升高，粉末冶金Ti-（2-20）Fe二元合金的强度及塑性趋于升高，而弹性模量趋于降低。相对而言，Ti-15Fe合金的综合性能最佳，其抗压强度为2702MPa，压缩率为32．7％，弹性模量为64．6GPa。随着Fe含量在2％-t5％范围内提高，合金的自腐蚀电位正向移动，腐蚀电流密度降低，极化电阻不断增大，腐蚀速率不断降低，耐蚀性能逐渐提高，而Ti-20Fe合金耐腐蚀性能与Ti-15Fe合金接近。Ti-15Fe合金在模拟口腔液（FAS）、磷酸盐缓冲溶液（PBS）、模拟体液（SBF）以及0．9％NaCl溶液（SSy9的腐蚀速率分别为1．7×10-3、7．1×10-4、1．2×10-3和3．5×10-4mm／y。与铸造CPTi和Ti-6A1-4V合金相比，Ti-15Fe合金具有较正的自腐蚀电位、较小的腐蚀电流密度和腐蚀速率及较大的极化电阻，耐蚀性能明显优于CPTi和Ti-6A1—4V合金。

英文摘要：

Titanium and its alloys have been widely used in the biomedical field, and have a great potential in making orthopedic implants due to their high specific strength, low elastic modulus, excellent biocompatibility and corrosion resistance in the human body environment. However, important titanium al- loys currently used including extra low interstitial （ELI） Ti-6AI-4V （hereafter all in mass fraction, %）, Ti-5AI- 2.5Fe and Ti-6AI-7Nb are all at risk of releasing toxic AI and V ions in vivo. In addition, the elastic modu- lus （about 110 GPa） of these alloys are still much higher than those of cortical bones （about 20 GPa）, which may bring severe ＇stress shielding＇ for implantation failures. In order to solve these problems, much effort has been made to develop AI- and V-free lower-modulus β-Ti alloys. Considering that Fe is one of most effective and low-cost #-phase stabilizing element in titanium, binary Ti-Fe alloys have been selected and an assessment of the potential for biomedical applications has been conducted from the perspectives of their manufacturability, mechanical properties and biocorrosion performance. In this study, Ti-xFe （2%~〈x~〈20%） alloys were fabricated by powder metallurgy, and their microstructure and compression properties were characterized. In particular, the corrosion properties in four different simulat- ed physiological electrolytes at （37±0.5） ℃ were investigated according to ASTM 59-97, compared with the performances of two commonly used titanium-based materials Ti-6AI-4V and commercially pure （CP） titanium. The results show that the content of β phase gradually increases with Fe content increasing. When Fe content goes upto 20%, the alloy samples are only composed of single β-phase grains. The PM-fabricated Ti-（2-20）Fe alloy is provided with a superior combination of mechanical properties, with the compressive strength range of 2096.2-2702.3 MPa, the compression ratio of 20.6%-33.2% and the elasticity modulus of 62.7-85.5 GPa. Higher Fe c