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High-entropy metal ceramic and preparation method and application thereof

A cermet and high-entropy technology, which is applied in the field of high-entropy cermet and its preparation, can solve the unreported problems in the field of cutting tools, and achieve the effects of high toughness, improved toughness, good wear resistance and cutting performance

Active Publication Date: 2020-01-31
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation of cermet materials by this technology and its application in the field of cutting tools have not been reported.

Method used

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  • High-entropy metal ceramic and preparation method and application thereof
  • High-entropy metal ceramic and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Preparation:

[0030] (1) with (Ti 0.2 Zr 0.2 f 0.2 Ta 0.2 Cr 0.2 )B 2 The powder is (1.5μm in particle size) matrix raw material, Ni, Co, Mo powder (purity is 99.5%, particle size is 3μm) is used as binder, according to (Ti 0.2 Zr 0.2 f 0.2 Ta 0.2 Cr 0.2 )B 2 : The volume ratio of Ni: Co: Mo is 78:8:8:6 for batching, with ethanol as the solvent, and cemented carbide YG6 balls as the ball milling medium. Uniform (Ti 0.2 Zr 0.2 Hf 0.2 Ta 0.2 Cr 0.2 )B 2 -Ni-Co-Mo powder.

[0031] (2) The dried (Ti 0.2 Zr 0.2 Hf 0.2 Ta 0.2 Cr 0.2 )B 2 -Put the Ni-Co-Mo mixed powder into a dry pressing mold, and perform dry pressing at 200MPa to obtain a molded green body

[0032](3) Put the molded biscuit into the atmosphere sintering furnace, raise the temperature to 1000°C at a rate of 20°C / min under a vacuum of less than 1mbar, and then fill it with 1atm argon within 5min. Raise the temperature to 1650°C / min, hold for 90 minutes, then cool down to 800°C at 2...

Embodiment 2

[0039] 1. Preparation:

[0040] (1) with (Ti 0.2 Zr 0.2 f 0.2 Ta 0.2 Cr 0.2 )B 2 powder (1.5 μm in particle size) as matrix raw material, Ni, Co, Mo powder (99.5% in purity, 3 μm in particle size) as binder, according to (Ti 0.2 Zr 0.2 f 0.2 Ta 0.2 Cr 0.2 )B 2 : The volume ratio of Ni: Co: Mo is 72:10:11:7 for batching, with ethanol as the solvent, and cemented carbide YG6 balls as the ball milling medium. After mixing for 12 hours at the speed of 200r / min in the planetary ball mill, the mixed Uniform (Ti 0.2 Zr 0.2 f 0.2 Ta 0.2 Cr 0.2 )B 2 -Ni-Co-Mo powder.

[0041] (2) The dried (Ti 0.2 Zr 0.2 f 0.2 Ta 0.2 Cr 0.2 )B 2 -Put the Ni-Co-Mo mixed powder into a dry pressing mold, and perform dry pressing at 200MPa to obtain a molded green body

[0042] (3) Put the molded biscuit into the atmosphere sintering furnace, raise the temperature to 800°C at 20°C / min under a vacuum of less than 1mbar, and then fill it with 1atm argon within 5min, and start the infl...

Embodiment 3

[0045] 1. Preparation:

[0046] (1) with (Ti 0.2 Zr 0.2 f 0.2 Ta 0.2 Cr 0.2 )B 2 powder (1.5 μm in particle size) as matrix raw material, Ni, Co, Mo powder (99.5% in purity, 3 μm in particle size) as binder, according to (Ti 0.2 Zr 0.2 f 0.2 Ta 0.2 Cr 0.2 )B 2 : The volume ratio of Ni: Co: Mo is 67:13:12:8 for batching, with ethanol as the solvent, and cemented carbide YG6 balls as the ball milling medium. After mixing for 12 hours at the speed of 200r / min in the planetary ball mill, the mixed Uniform (Ti 0.2 Zr 0.2 f 0.2 Ta 0.2 Cr 0.2 )B 2 -Ni-Co-Mo powder.

[0047] (2) The dried (Ti 0.2 Zr 0.2 f 0.2 Ta 0.2 Cr 0.2 )B 2 -Put the Ni-Co-Mo mixed powder into a dry pressing mold, and perform dry pressing at 200MPa to obtain a molded green body

[0048] (3) Put the molded biscuit into the atmosphere sintering furnace, raise the temperature to 1000°C at a rate of 20°C / min under a vacuum of less than 1mbar, and then fill it with 1atm argon within 5min. Raise ...

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Abstract

The invention belongs to the field of metal ceramic cutting tools, and discloses high-entropy metal ceramic and a preparation method and application thereof. The high-entropy metal ceramic is preparedby the following steps: ball-milling and mixing high-entropy boride ceramic powder (A0.2B0.2C0.2D0.2E0.2) B2 and binders Ni, Co and Mo, wherein ABCDE is a different element in Ti, Zr, Hf, V, Nb, Ta,Cr, Mo or W; drying to obtain mixed powder; dry-pressing the mixed powder into blocks; heating to 800-1200 DEG C in vacuum in a normal pressure atmosphere; and heating to 1500-1800 DEG C in a protective atmosphere, and calcining. The high-entropy metal ceramic has the advantages of high hardness, favorable toughness, favorable chemical stability, favorable wear resistance and favorable impact resistance, and can be used for intermittent cutting of difficult-to-machine materials.

Description

technical field [0001] The invention belongs to the technical field of cermet cutting tools, and more specifically relates to a high-entropy cermet and its preparation method and application. Background technique [0002] High-entropy ceramics are high-entropy solid solutions of inorganic non-metallic materials, and are generally single-phase ceramic materials composed of more than 4 equal-proportion metal elements and several non-metal elements. Boride ceramics are ceramic materials with high melting point and high hardness, which have excellent high temperature resistance and wear resistance. Among them, the high-entropy boride is a high-entropy solid solution formed by combining a variety of transition metal elements with equal atomic ratios and B atoms, and is a single-phase multi-component boride crystal. [0003] Among them, the chemical formula of the 5-membered high-entropy boride is (A 0.2 B 0.2 C 0.2 D. 0.2 E. 0.2 )B 2 , ABCDE is a metal element of Group ⅣB,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/14C22C1/05C22C1/10
CPCC22C1/051C22C29/005C22C29/14
Inventor 许亮谭大旺郭伟明林华泰
Owner GUANGDONG UNIV OF TECH
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