粉末冶金镁基材料研究进展

Research Progress in Powder Metallurgical Mg-based Materials

镁及其合金具有密度低、比强度和比刚度高、阻尼减振和电磁屏蔽性能好、液态成型和机加工性能优良、易回收再生等优点,在航空航天、地面交通和3C产品等领域具有很好的应用前景。然而,镁合金的绝对强度偏低,耐热和耐腐蚀性能不佳,限制了其更广泛的应用。研究和工程实践显示,粉末冶金工艺在改善镁基材料力学性能和耐蚀性方面具有很大的潜力。本文综述了粉末冶金镁基材料研究的最新进展,并简要介绍了粉末冶金镁基材料在生物医学、汽车和储氢等领域的应用情况,最后,展望了粉末冶金镁基材料及工艺研究的发展方向。

Magnesium and its alloys have many advantages,such as low density,high specific strength and stiffness,good damping and electromagnetic shielding performance,good liquid formability and machinability,and easy recycling.They exhibit splendid application prospects in aerospace,transportation and 3C products.However,the low absolute strength and poor heat and corrosion resist ance of magnesium alloys limit their wider application.Research and engineering practice show that powder metallurgy process has great potential in improving mechanical properties and corrosion resistance of Mg-based materials.In this paper,the development of powder metallurgical Mg-based materials was reviewed,and their applications in biomedicine,automobile and hydrogen storage were briefly introduced.Finally,the development direction of powder metallurgical Mg-based materials and process research was prospected.