Copper-containing antibacterial high-entropy alloy and preparation method thereof

Abstract

The invention provides a copper-containing antibacterial high-entropy alloy and a preparation method thereof. The general formula of the copper-containing antibacterial high-entropy alloy is FeCoxCryCuz, x is larger than or equal to 0.3 and smaller than or equal to 0.5, y is larger than or equal to 0.5 and smaller than or equal to 1.0, z is larger than or equal to 0.2 and smaller than or equal to 0.6, and x, y and z are molar ratios. The preparation method of the copper-containing antibacterial high-entropy alloy comprises the following steps that after Fe, Co, Cr and Cu are stacked according to the proportion, vacuum arc melting is adopted, and the copper-containing antibacterial high-entropy alloy is obtained. The copper-containing antibacterial high-entropy alloy has excellent antibacterial performance in an as-cast state, after the copper-containing antibacterial high-entropy alloy and escherichia coli / staphylococcus aureus (the bacterial concentration is about 105 CFU / mL) are co-cultured for 24 hours at the temperature of 37 DEG C, the antibacterial rate reaches up to 99.97%, the antibacterial efficiency is far better than that of traditional copper-containing 304 stainless steel, meanwhile, the copper-containing antibacterial high-entropy alloy has excellent strength and certain plasticity, and the copper-containing antibacterial high-entropy alloy can be widely applied to the field of stainless steel. The compression yield strength of an as-cast sample at room temperature exceeds 950 MPa, and the engineering strain (compression fracture strain) exceeds 30%.

Description

technical field [0001] The invention relates to alloy technology, in particular to a copper-containing antibacterial high-entropy alloy and a preparation method thereof. Background technique [0002] At present, the commonly used antibacterial metal materials are mostly alloy antibacterial metal materials. Because the entire matrix is ​​distributed with antibacterial elements, the interior and surface of the alloy also have antibacterial effects, and can maintain efficient and durable antibacterial effects, thus being widely used. At present, the commonly used alloy antibacterial metal materials are mainly based on traditional alloys such as stainless steel, cobalt-chromium alloy, titanium and titanium alloy, and the natural antibacterial element copper is introduced, and then formed in the matrix through complex antibacterial annealing and other heat treatment processes. Copper-rich phase, when the copper-containing antibacterial alloy is in contact with the environmental m...

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Problems solved by technology

[0003] The purpose of the present invention is to propose a copper-containing antibacterial high-entropy alloy, which has poor antibacterial properties in the as-cast state, in view of the above-mentioned traditional copper-containing antibacterial alloys with poor mechanical properties in the as-cast state and the need to obtain antibacterial efficacy through complicated heat treatment processes. Far beyond the traditional copper-containing 304 stainless steel, while having good mechanical properties

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