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CoFexNiyV0.5Nbz high-entropy alloy and preparation method thereof

A technology of high-entropy alloys and mixtures, which is applied in the field of metal materials and their preparation, can solve the problems of degradation, brittleness, micro-crack wear resistance, etc., and achieve the effects of preventing crack propagation, high hardness, and excellent wear resistance

Inactive Publication Date: 2018-01-09
DALIAN UNIV OF TECH
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Problems solved by technology

However, when the hardness exceeds a certain range, brittle microcracks will appear during the friction process, resulting in a decrease in wear resistance.

Method used

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  • CoFexNiyV0.5Nbz high-entropy alloy and preparation method thereof
  • CoFexNiyV0.5Nbz high-entropy alloy and preparation method thereof
  • CoFexNiyV0.5Nbz high-entropy alloy and preparation method thereof

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Embodiment Construction

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] CoFe in the following examples x Ni y V 0.5 Nbz The melting of high-entropy alloy adopts WK type non-consumable vacuum melting furnace, and the equipment model is DHL-1250.

[0031] a CoFe x Ni y V 0.5 Nb z The preparation method of high entropy alloy, concrete steps are as follows:

[0032] S1. Ultrasonic cleaning: put Co soli...

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Abstract

The invention discloses a CoFexNiyV0.5Nbz high-entropy alloy and a preparation method thereof. The CoFexNiyV0.5Nbz high-entropy alloy consists of the following elements in molar percentage: 1:x:y:0.5:z, wherein x is greater than or equal to 1.0 and smaller than or equal to 2.0, y is greater than or equal to 0 and smaller than or equal to 2.0, z is greater than or equal to 0 and smaller than or equal to 1.0. The preparation method for the CoFexNiyV0.5Nbz high-entropy alloy comprises the following specific steps of: ultrasonically cleaning; batching; and smelting the high-entropy alloy. A microstructure of a hard Laves phase is dispersed and distributed in a soft FCC solid solution, the structure generally has good wear resistance, the hard phase achieves the effect of strengthening the alloy, and a soft phase achieves the effect of preventing cracks from expanding. According to the results, the alloy with a eutectic component and a hypereutectic component shows the most outstanding wearresistance and relatively high hardness.

Description

technical field [0001] The invention provides a CoFe x Ni y V 0.5 Nb z A high-entropy alloy and a preparation method thereof belong to the field of metal materials and its preparation. Background technique [0002] In 1995, Taiwan scholar Ye Junwei proposed to add five or more main elements to the alloy system in the form of equimolar ratio or nearly equimolar ratio, and defined this alloy as a high-entropy alloy. After research, Ye Junwei et al. found that the high mixing entropy in the high-entropy alloy system will reduce the free energy of the alloy system and promote the formation of a simple solid solution structure. In the same year, Cantor et al. proposed a high-entropy alloy of CoCrFeMnNi composition and found that it had a single-phase FCC solid solution structure. [0003] With the deepening of the research, the researchers found that multi-phase structures, even eutectic structures with close volume fractions of the two phases, usually appear in high-entropy...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C1/02
Inventor 蒋丽曹志强卢一平李廷举
Owner DALIAN UNIV OF TECH
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