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Preparation method of Ti-based high-entropy amorphous-dendritic composite material

A composite material and high-entropy technology, which is applied in the field of preparation of Ti-based high-entropy amorphous-dendrite composite materials, can solve problems such as the difficulty of dendrite-amorphous composite materials, and achieve easy preparation, improved compression plasticity, and excellent performance. Effect

Active Publication Date: 2019-01-25
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

The preparation method of obtaining high-strength and tough materials by introducing in-situ precipitation of the second phase in the amorphous structure requires the amorphous system to have good amorphous-forming ability, so in the high-entropy amorphous with limited amorphous-forming ability, the in-situ introduction of the second phase It is difficult to prepare dendritic amorphous composites in two phases

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  • Preparation method of Ti-based high-entropy amorphous-dendritic composite material
  • Preparation method of Ti-based high-entropy amorphous-dendritic composite material

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Embodiment 1

[0026] A Ti-based high-entropy amorphous-dendritic composite material Ti 20 Zr 20 Hf 20 Nb 10 Cu 10 be 20 The preparation method comprises the following steps:

[0027]S1. Surface treatment of raw materials: each elemental element Ti, Zr, Hf, Nb, Cu, and Be with a purity greater than or equal to 99.9% was ultrasonically cleaned with acetone and ethanol for 20 minutes, and dried with a hair dryer, and then weighed according to the following mass Take the treated elements: 4.73g Ti, 9.02g Zr, 17.63g Hf, 4.59g Nb, 3.14g Cu and 0.89g Be;

[0028] S2. Alloy smelting: according to Ti 25 Zr 25 f 25 Nb 25 Weigh 4.76g Ti, 8.89g Zr, 17.40g Hf and 9.05g Nb respectively into a water-cooled copper crucible and place it in a vacuum electric arc furnace. Close the furnace door and draw a vacuum to 1*10 -3 MPa, and then filled with 0.3MPa high-purity argon gas. After arcing, the titanium ingot was smelted three times to absorb the residual oxygen in the furnace, and then the mixed r...

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Abstract

The invention provides a preparation method of a Ti-based high-entropy amorphous-dendritic composite material. The preparation method is mainly characterized in that Ti20Zr20Hf20Nb10Cu10Be20 of a predesigned alloy proportion is alloyed through a vacuum electric-arc furnace, and comprises the following steps that elementary substance elements with the purity being larger than or equal to 99.9% areweighed according to the atom proportion of Ti25Zr25Hf25Nb25, smelting is carried out, and thus a first intermediate alloy is obtained; then elementary substance elements are weighed according to theatom proportion of Ti16.67Zr16.67Hf16.67Cu16.67Be16.67, smelting is carried out, and thus a second intermediate alloy is obtained; and finally the first intermediate alloy and the second intermediatealloy are subjected to mixed smelting and suction-casting, and thus the high-entropy amorphous-dendritic composite material Ti20Zr20Hf20Nb10Cu10Be20 is obtained. The preparation method provided by theinvention is simple and easy to operate, the compression performance of the obtained composite material is significantly improved, and the method is suitable for industrial production and popularization.

Description

technical field [0001] The invention relates to the technical field of amorphous composite materials or high-entropy alloys, in particular to a method for preparing a Ti-based high-entropy amorphous-dendrite composite material. Background technique [0002] Amorphous alloys, also known as metallic glasses, are materials with many novel properties. Amorphous state refers to the arrangement state of long-range disorder and short-range order in the internal atomic structure of the material. Unlike traditional oxide glasses, the bonds between atoms in amorphous alloys are metallic bonds rather than covalent bonds. Due to its unique disordered structure, it does not have defects such as dislocations and vacancies in crystalline materials. Therefore, amorphous alloys have excellent mechanical, physical and chemical properties, such as high strength (about 1 / 50 Young's modulus ), high corrosion resistance, excellent magnetic properties and superplasticity at a certain temperature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/02C22C1/03C22C14/00
CPCC22C1/03C22C14/00C22C30/02
Inventor 王海丰杜银周青任越韩伟超
Owner NORTHWESTERN POLYTECHNICAL UNIV
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