脱合金法制备纳米多孔泡沫钛合金

Nanoporous Ti Alloy Foam Prepared by Dealloying

摘要:

利用脱合金的方法以低铝含量的Ti6Al4V合金为前驱体，以NaOH溶液为电解质，成功制备了纳米多孔泡沫钛合金。通过动电位极化和恒电位极化对该体系的脱合金行为进行表征。结果表明：该体系的临界电压值为0.6 V。在临界电压附近，电流密度很快衰减。电压恒定在2.1 V时，电流快速增加到峰值后保持恒定。这是由Al的快速持续溶解所致

Abstract:

Nanoporous Ti alloy foam was prepared by dealloying from Ti-6Al-4V with low Al content in NaOH solution. The dealloying behavior for these systems was characterized using both dynamic polarization and potential hold measurements. The results indicate that the critical potential values for these system is 0.6 V. Potentials hold within the vicinity of the critical potential displays rapid decaying currents. With potential hold at 2.1 V, current intensities rapidly reach the peak and then show a constant. It is ascribe to Al sustain dissolution