High Density Plasma Nitriding of Al-Cu Alloys for Automotive Parts

Duralumin alloys have been utilized as structural components and parts for aircrafts, train-cars and so forth. Their high specific strength was attractive to those applications; however, their little corrosion resistance and low wear endurance became a fatal demerit in practical applications. In order to overcome these issues of high strength aluminum alloys, high density plasma nitriding is proposed as an effective surface treatment for duralumin. This process has a capability to control the RF- and DC-plasmas independently for nitriding. This enables us to temporally control and describe the plasma state by in-situ plasma diagnosis. This plasma diagnosis was instrumented to search for optimum processing condition to plasma nitriding the duralumin alloys of type A2011. Both type A2011 aluminum alloy plates and pipes were employed to describe the inner nitriding behavior for hardening the duralumin alloys by the present plasma nitriding.

美NITRD发布“智慧城市与社区联邦战略计划”

2017年1月,美国网络与信息技术研发计划（NITRD）智慧城市与社区任务组发布《智慧城市与社区联邦战略计划：共同探索创新》草案报告。该战略计划提供了一个高层框架以指导和协调智能城市/相关社区的联邦活动,尤其是促进当地政府与利益相关方的参与。协调各联邦机构之间的工作将有助于加快制定智能城市/社区方案,使投资的价值最大化,并优化居民收益。