Plasma-electrolytic oxidation of thermally sprayed aluminium coatings for high-temperature wear applications under particle-loaded hot-gas jets

热喷涂铝涂层的等​​离子电解氧化，用于颗粒负载热气射流下的高温磨损应用

• 批准号: 265717247
• 负责人: Professor Dr.-Ing. Thomas Lampke
• 金额: --
• 依托单位: Professur Werkstoff- und Oberflächentechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/265717247?language=en
• 关键词: Plasma; electrolytic; oxidation; thermally; sprayed

Ceramic coatings, especially of aluminium oxide, are applied to increase resistance against wear and corrosion and for thermal insulation of metallic surfaces. Plasma-electrolytic oxidation (PEO) of thermally sprayed aluminium coatings is an innovative production method by which even steel and polymeric substrates can be coated with highly abrasive wear-resistant PEO coatings. Al coatings incompletely converted to Al2O3 are strongly limited with regard to the operation temperature. The relatively brittle ceramic coatings only show a very low resistance against particle jet erosion at high impact angles. This research project aims to make thermally sprayed and plasma-electrolytically treated aluminium coatings accessible to new fields of application such as smelting industry and powertrain production. A significant decrease in brittleness of the PEO coatings by incorporating ductile elements like copper or nickel into the aluminium layer and thus into the PEO coating will be focussed on in order to achieve considerably increased resistance against particle jet erosion at high impact angles. Higher operation temperatures of the ceramic composite coatings are intended by applying heat-resistant materials like titanium.

陶瓷涂层，尤其是氧化铝涂层，用于提高耐磨性和耐腐蚀性，并用于金属表面的隔热。热喷涂铝涂层的等离子体电解氧化(PEO)是一种新型的生产方法，它甚至可以在钢和聚合物基材上涂覆高耐磨PEO涂层。未完全转化为Al_2O_3的涂层在工作温度方面受到很大的限制。相对脆性的陶瓷涂层在大冲击角下仅表现出很低的抗颗粒射流侵蚀能力。该研究项目旨在使热喷涂和等离子电解处理的铝涂层能够应用于新的应用领域，如冶炼工业和动力总成生产。通过在铝层和PEO涂层中加入铜或镍等延性元素，显著降低PEO涂层的脆性，从而显著提高在高冲击角下的抗粒子射流侵蚀能力，将是重点关注的问题。通过应用钛等耐热材料，可以提高陶瓷复合涂层的使用温度。

项目成果

Plasma Electrolytic Oxidation of High-Strength Aluminium Alloys—Substrate Effect on Wear and Corrosion Performance

• DOI: 10.3390/met8050356
• 发表时间: 2018-05
• 作者: M. Sieber;F. Simchen;R. Morgenstern;I. Scharf;T. Lampke