The low-cost Fe-based amorphous coating with the composition of Fe49.9Mo32.9Cr9.32Co4.55Si2.28Al1.55 (wt.%) were deposited on 316L stainless steel substrate by subsonic flame spraying under optimum spraying parameters. The microstructure, phase composition, microhardness, corrosion-resistance, and wear-resistance properties of the coatings were systematically investigated. The prepared coating primarily consists of amorphous phase (calculated amorphous phase content was 90.23%), and the hardness of the prepared coating can reach 981.6 HV0.1, which is much larger than that of the substrate material 316L stainless steel. The corrosion potential and corrosion current density of the prepared Fe-based amorphous coating in 3.5 wt.% NaCl solution are −438 mV and 6.9 μA/cm2, respectively. Compared with 316L stainless steel and some newly published Fe-based amorphous coatings, the prepared coating shows better corrosion resistance properties. The dry sliding wear rate of the coatings with 0.45% C steel balls at 19.6 N is 1.68 × 10−5 mm3/Nm. The friction coefficient of the coating is at an ultra-low level (about 0.26) and can keep relatively steady throughout the sliding test. The study shows that the prepared Fe-based amorphous coating has high amorphous phase content, high hardness, superior corrosion-resistance, and wear-resistance properties.

Microstructure, corrosion-resistance, and wear-resistance properties of subsonic flame sprayed amorphous Fe–Mo–Cr–Co coating with extremely high amorphous rate

Tribological behaviors of high-hardness Co-based amorphous coatings fabricated by laser cladding

Soft magnetic composites (SMCs) are a crucial material in the process of electromagnetic conversion, playing a critical role in power production, transmission and utilization. Third-generation semiconductors necessitate soft magnetic materials with distinctive characteristics, such as high response, high power density and low total loss. Fe-based amorphous soft magnetic alloys exhibit exceptional soft magnetic properties, including high saturation magnetization, low coercivity and high permeability. To mitigate high eddy current loss, the utilization of ultra-thin laminating or powder composite cores is recommended. Amorphous soft magnetic composites (ASMCs) are produced through powder metallurgy techniques utilizing insulated and/or coated amorphous soft magnetic powders. The paper presents an overview of Fe-based ASMCs development history, various types of insulating, coating preparation methods, molding preparation technology, heat treatment process and recent significant achievements. Additionally, the study highlights future research hotspots and trends in the discipline of Fe-based ASMCs, along with critical concerns, development prospects and directions faced. 

Recent advances and future developments in Fe-based amorphous soft magnetic composites

Durable self-polishing antifouling Cu-Ti coating by a micron-scale Cu/Ti laminated microstructure design

Additive manufacturing of magnesium matrix composites: Comprehensive review of recent progress and research perspectives

Differences in dry sliding wear behavior between HVAF-sprayed amorphous steel and crystalline stainless steel coatings

Impact of gas pressure on particle feature in Fe-based amorphous alloy powders via gas atomization: Simulation and experiment

The invention discloses a design method for alloy compositions for regulating and controlling the aluminum base amorphous forming ability and belongs to the technical field of aluminum base amorphous alloys. According to different electronic action mechanisms of adding TM and RE elements in a microscale mode in a AL-TM (transition elements)-RE(a rare earth element) ternary amorphous alloy system, a formula (1) is formulated as delta=|KP-2KF|; in the formula (1), when the delta value approaches to 0, the total energy of the system tends to be the lowest, and the amorphous forming ability is strengthened; and according to the rule, the amorphous forming ability of the system is regulated and controlled, so that the large size aluminum base amorphous alloy is prepared. According to the proposed method, the problem of a large amount of resource waste existing in an original design of aluminum base amorphous alloy compositions is solved, a quinary complete block body aluminum amorphous alloy which has the largest size in the world is designed, and the design method has an important propulsive effect on enlarging the application range of the lightweight and high-strength aluminum base amorphous alloy.

Design method for alloy compositions for regulating and controlling aluminum base amorphous forming ability

The invention discloses an iron-based amorphous alloy with a strong glass forming ability and a high-density long-term corrosion-resisting amorphous alloy coating and belongs to the technical field of surface engineering The chemical formula of the amorphous alloy is FeaCrbMocMxPdBeCfSig, M is at least one of Mn, Ni and W, b is equal to or larger than 16 and equal to or less than 22, c is equal to or larger than 5 and equal to or less than 10, x is equal to or larger than 2 and equal to or less than 5, d is equal to or larger than 9 and equal to or less than 15, e is equal to or larger than 1 and equal to or less than 5, f is equal to or larger than 2 and equal to or less than 6, g is equal to or larger than 1 and equal to or less than 4, and the balance Fe An amorphous alloy strip is prepared through a single-roller melt sharp cooling method, an iron-based amorphous alloy powder body is obtained through an ultrasonic gas atomization method, and through a hypersonic flame spraying technology, alloy powder is sprayed on the surface of a carbon steel base plate to obtain the iron-based amorphous alloy coating An alloy material has a complete amorphous structure, high hardness and an excellent corrosion-resisting property, a powder body material has high spherical degrees and super high amorphous degrees, and the coating has super high amorphous contents, super low porosity and an excellent long-term corrosion-resisting property

Iron-based amorphous alloy with strong glass forming ability and high-density long-term corrosion-resisting amorphous alloy coating

The invention discloses an amorphous alloy coating with advantages of wear resistance, corrosion resistance and slip resistance, and a preparation method thereof, and belongs to the technical field ofamorphous alloy coatings According to the present invention, the coating is prepared by using a HVAF supersonic flame spraying method, wherein the HVAF supersonic flame spraying uses gas fuels suchas propane, propylene and the like, and uses compressed air as a combustion aid, such that the low-temperature high-speed process is achieved while the use of a large amount of oxygen is avoided; thecoating obtained through the method comprises the following components by mass: 13-25% of Cr, 10-30% of Mo, 0-8% of W, 0-5% of Mn, 1-4% of B, 0-4% of Si, 0-4% of C, 40-65% of Fe, 0-5% of Y, 0-1% of Ca, and less than or equal to 3% of other impurities; and the coating obtained through the method is uniform, and has advantages of low porosity, high hardness, excellent corrosion resistance and excellent slip resistance

Amorphous alloy coating with advantages of wear resistance, corrosion resistance and slip resistance, and preparation method thereof

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