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制备了用于骨科的挤压态Mg-Sn-Ca合金,并应用金相显微镜、扫描电子显微镜、X射线衍射仪、拉伸测试、浸泡测试和电化学测试等仪器和方法对其进行研究。结果表明:当锡添加量为1%,钙含量从0.2%增加到0.5%时,挤压态Mg-Sn-Ca合金的显微组织变得均匀,力学性能增加,耐腐蚀性提高。钙含量进一步增加到1.5%时,合金的强度增加,但伸长率和耐腐蚀性降低。在钙含量为0.5%的合金中,锡的含量从1%增加到3%时,合金的最大抗拉强度增加,耐腐蚀性降低。当锡含量为2%时,合金呈现最低的屈服强度和伸长率。挤压态Mg-Sn-Ca合金的这些行为受到Sn/Ca比率的控制。分析表明挤压态Mg-1Sn-0.5Ca合金有潜力作为可降解骨科植入体。
The extruded Mg-Sn-Ca alloy was prepared for orthopedics and was studied by means of metallographic microscope, scanning electron microscope, X-ray diffraction, tensile test, immersion test and electrochemical test. The results show that the microstructure of extruded Mg-Sn-Ca alloy becomes homogeneous, the mechanical properties increase and the corrosion resistance increases when the content of tin is 1% and the content of calcium increases from 0.2% to 0.5%. When the calcium content is further increased to 1.5%, the strength of the alloy increases, but the elongation and corrosion resistance decrease. When the content of tin increased from 1% to 3% in 0.5% calcium alloy, the maximum tensile strength of the alloy increased and the corrosion resistance decreased. When the tin content is 2%, the alloy exhibits the lowest yield strength and elongation. These behaviors of extruded Mg-Sn-Ca alloys are governed by the Sn / Ca ratio. Analysis shows that extruded Mg-1Sn-0.5Ca alloy has the potential as a degradable orthopedic implant.