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Preparation method of binary tungsten boride superhard material

A technology of superhard materials and borides, applied in the direction of boron/borides, metal borides, etc., can solve problems such as difficult to obtain, vacuum degree and cooling speed affect product quality, boron volatilization, etc., to achieve simple control and preparation process Simple, Controllable Effects

Active Publication Date: 2017-12-15
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the vapor pressure of boron is much lower than that of transition metals, it is easy to volatilize boron during the smelting process and it is difficult to obtain the desired product; in addition, the vacuum degree and cooling speed in the arc melting furnace will also affect the quality of the product

Method used

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  • Preparation method of binary tungsten boride superhard material
  • Preparation method of binary tungsten boride superhard material
  • Preparation method of binary tungsten boride superhard material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Use a high-energy ball mill for ball milling. In a glove box filled with argon, mix high-purity tungsten powder (W) and boron powder (B) at a stoichiometric ratio of 1:5, and add six tungsten carbide balls. , the size is 11.20mm, the mass ratio of the ball to the mixed powder is 4:1.

[0036] (2) Fix the tungsten carbide ball mill tank with powder and balls on the high energy ball mill. Stop the ball mill for 20 minutes every 1 hour (to prevent the engine from overheating), and obtain tungsten diboride powder.

[0037] (3) The ball milling time is 20h.

Embodiment 2

[0039] The difference from Example 1 is that the ball milling time is 24h, and the others are the same as Example 1.

Embodiment 3

[0041] The difference from Example 1 is that the ball milling time is 28h, and the others are the same as Example 1.

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Abstract

The invention discloses a preparation method of a binary tungsten boride superhard material, which comprises: by adopting a mechanical alloy method and utilizing high-energy ball milling, in the argon shield atmosphere, using high purity tungsten powder and boron powder as raw materials to directly synthesize tungsten diboride powder in a powder state under room temperature, and then carrying out thermal processing on the synthetic powder to prepare a tungsten tetraboride material. The preparation method disclosed by the invention is simple and convenient in preparation process and high in controllability, adopts atmosphere sintering in the sintering stage, has no other special requirements for equipment, and is high in universality.

Description

technical field [0001] The invention relates to the field of inorganic non-metallic superhard materials, in particular to a preparation method of a binary tungsten boride superhard material. Background technique [0002] Superhard materials (Hv>40GPa) are widely used in the fields of cutting tools, wear-resistant coatings and abrasive materials because of their high hardness and strength, good wear resistance, surface stability and other excellent properties. According to the literature, WB 4 The Vickers hardness under a load of 0.49N is 43.3±2.9GPa, which belongs to the category of superhard materials; at the same time, WB 4 It also has excellent properties such as high melting point, high hardness, high electrical conductivity of W-B series compounds, high corrosion resistance and oxidation resistance to different types of media. Therefore, studying WB 4 The preparation has high scientific research and practical value. [0003] Currently, WB 4 The preparation of st...

Claims

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Application Information

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IPC IPC(8): C01B35/04
CPCC01B35/04C01P2002/72C01P2004/03
Inventor 龙莹郑鑫邹灿辉林华泰王成勇
Owner GUANGDONG UNIV OF TECH
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