超低磁Fe基非晶合金涂层的设计与制备工艺

Low cost, ultra-high strength and excellent wear and corrosion resistances ensure Fe-based amorphous alloys have great application prospects in mechanic, chemical, aerospace and other fields. Especially, the Fe amorphous alloys with ultra-low magnetism have important strategic significance on the defense industry. However, due to the size limit, Fe-based amorphous alloys are difficult to be widely used as a structural material. The use of advanced thermal spraying technology to prepare high quality amorphous coating can effectively overcome this problem and expand application scope of Fe-based amorphous alloys. In order to combine the excellent physical and chemical properties of Fe-based amorphous alloy with the advantages of coating, this project will develop ultra-low magnetic Fe-based amorphous alloy compositions using the alloying method and based on magnetic and quantum mechanics theory, adopt high velocity oxygen-fuel (HVOF) spraying methods to produce high quality Fe-based amorphous coating and systematically evaluate the service performance of the Fe-based amorphous coating under complex environment. The research in this project will promote the understanding of the physical and metallurgical process of amorphous alloys and provide strong theoretical guidance for expanding application scope of Fe-based amorphous alloys in civil industry and especially, in the defense and military industries.

低廉的成本、超高的强度及优异的耐磨与耐蚀性使得Fe基非晶合金在机械、化工、航空航天等领域具有巨大的应用前景，尤其是具有超低磁性的Fe基非晶合金材料对国防工业具有重大的战略意义。然而，由于尺寸上的限制，Fe 基非晶合金难以作为一种结构材料而得到广泛应用。采用先进的热喷涂技术制备高质量非晶涂层，可有效克服Fe基非晶合金的尺寸限制问题，进而显著拓展Fe基块体非晶合金的应用范围。为了将Fe基块体非晶合金优异的物理化学性能与涂层的优势结合起来，本项目拟运用合金化方法并基于磁性的量子力学理论，设计具有超低磁性的Fe基非晶合金成分，采用超音速火焰喷涂方法制备高质量的Fe基非晶合金涂层，系统评价涂层在复杂环境下的服役性能。本项目的研究必将促进对非晶合金材料物理冶金过程的深层次理解，并将为拓展非晶合金涂层在国民经济支柱产业、特别是军事和国防工业中的应用提供有力的理论指导。

采用先进的热喷涂技术制备高质量非晶涂层，可有效克服Fe基非晶合金的尺寸限制问题，进而显著拓展Fe基块体非晶合金的应用范围。本项目设计出具有超低磁性的Fe基非晶合金成分，采用超音速火焰喷涂方法制备了高质量的Fe基非晶合金涂层材料，系统评价了涂层材料在复杂环境下的服役性能。铁基非晶合金涂层材料显微硬度达到1000以上，孔隙率低于1.0%，在盐酸、硫酸以及氯化钠水溶液中表现出极强的耐腐蚀能力。非晶涂层材料抗冲刷腐蚀性能较不锈钢提高近12倍，表现出优异抗冲刷腐蚀综合性能。揭示了非晶涂层材料力学和腐蚀耦合作用机理，为铁基非晶涂层材料在力学和腐蚀耦合环境中的应用提供重要的科学指导依据和技术支持。发表学术论文10余篇，获得国家发明专利1项，培养博士研究生1名、硕士研究生4名。