自蔓延高温合成钴-钛系多孔合金

采用自蔓延高温合成制备了Co-Ti多孔体新型人体骨、关节材料。以Ti粉和Co粉按原子比Ti∶Co=1∶1与Ti∶Co=2∶12种配比的原料,在10Pa负压条件下,500℃预热2min点燃进行自蔓延合成反应。对反应产物进行XRD分析和SEM观察及力学性能测试。结果表明,2种合成产物分别为单相CoTi和CoTi2。CoTi的结构和力学性能比CoTi2优越。其孔隙率为40.9%,抗压强度308MPa,抗折强度134MPa,弹性模量11.6GPa,与人体骨、关节具有很好的力学性能相容性。因此用SHS法制备的CoTi多孔合金有望作为一种新型人体植入材料获得开发应用。

Ti-Co Porous Alloys Prepared by SHS Process

In order to develop new bio-materials Co-Ti porous alloys were prepared as artificial bone by self-propagation high-temperature synthesis(SHS). The mixture of titanium and cobalt powder was ignited under the vacuum protecting. CoTi porous alloys with different microstructure were obtained by preheating explosion. SEM and XRD were used to analysis pore characteristics and phase structures of the samples. The mechanical property testing show that it is a useful method to prepare CoTi porous alloys by SHS.