摘要
A novel metal-enamel interlocking coating was designed and prepared in situ by co-deposition of Ni-enamel composite layer and subsequent air spray of enamel with 10 wt% nanoscale Ni. During the firing process, the external enamel layer was melted and jointed with the enamel particles at the upper part of the Ni-plating layer to form the enamel pegs. Thermal shock tests of pure enamel, enamel with 10 wt% Ni composite and metal-enamel interlocking coatings were conducted at 600 °C in water and static air. The results indicated that the metal-enamel interlocking showed superior thermal shock resistance to both pure enamel and enamel with 10 wt% Ni composite coatings. The enhanced performance was mainly attributed to the advantageous effects of mechanical interlocking of the enamel pegs formed at the enamel/Ni-plating interface. Meanwhile, during thermal shock test, big clusters formed by nanoscale Ni agglomerations were oxidised to be a Ni/NiO core–shell structure while small single nanoscale Ni grains were oxidised completely, which both improved the thermal shock resistance of enamel coating significantly.
基金
financially supported by the Excellent Youth Foundation of Liaoning Province(No.2019-YQ-03)
the CNPC Science and Technology Development Project(Nos.2019B4013 and 2019A-3911)
the National Key R&D Program of China(Nos.2019YFF0217500 and 2016ZX05022-055)
the Science Fund for Distinguished Young Scholars of Shaanxi Province
the Ministry of Industry and Information Technology Project(No.MJ-2017-J-99)。
作者简介
Chengyang Jiang,jiangchengyang@mail.neu.edu.cn。
