Polycrystalline superhard material with gradient nano-micro structure and synthesis method thereof

A technology for polycrystalline superhard and nano-carbon materials, which is applied in the growth of polycrystalline materials, chemical instruments and methods, and single crystal growth to achieve the effects of high overall strength, good wear resistance and reduction of internal stress.

Active Publication Date: 2014-09-24
BEIJING QINGDAWEINA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to solve the problem that polycrystalline superhard materials need to be "hard and tough", the present invention provides a gradient nano-microstructure polycrystalline superhard material with high hardness, good wear resistance, compact structure, good toughness and designable structure. Materials and their synthesis methods

Method used

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  • Polycrystalline superhard material with gradient nano-micro structure and synthesis method thereof
  • Polycrystalline superhard material with gradient nano-micro structure and synthesis method thereof
  • Polycrystalline superhard material with gradient nano-micro structure and synthesis method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Tool material grown for turning tools: see figure 1 .

[0044] Table 1: An example of the proportion of tool material components used for growing turning tools

[0045]

[0046] Prepare the nanomaterial precursor according to Table 1, add ethanol and wet ball mill for 4 hours, then take it out and dry it, send it to a vacuum treatment system (not marked), 750K hydrogen, purify for 30 minutes, and pass nitrogen after cooling, please refer to figure 1 In situ assembly. Under the conditions of pressure 8GPa and temperature 1600-2200K, the process is grown for 120 seconds, then cooled and the pressure is released to obtain a gradient nano-microstructure polycrystal with a diameter of 14 mm and a height of 5 mm.

Embodiment 2

[0048] Cutting material grown for drill bits: see figure 2 .

[0049] Table 2: Examples of component distribution ratios of growing drill bit cutting materials

[0050]

[0051] Prepare the nanomaterial precursor according to Table 2, add ethanol and wet ball mill for 6 hours, then take it out and dry it, send it to a vacuum treatment system (not marked), 780K hydrogen, purify for 40 minutes, and pass nitrogen after cooling, please refer to figure 2 In situ assembly. Under the conditions of pressure 8GPa and temperature 1600-2200K, the process is grown for 150 seconds, then cooled, and the pressure is released to obtain a gradient nano-microstructure polycrystal with a diameter of 14 mm and a height of 8 mm.

Embodiment 3

[0053] Ball head material grown for durometer indenters: see figure 1 .

[0054] Table 3: An example of the distribution ratio of the ball head material used as a hardness tester indenter

[0055]

[0056] Prepare the nanomaterial precursor according to Table 3, add ethanol and wet ball mill for 6 hours, then take it out and dry it, send it to a vacuum treatment system (not marked), 760K hydrogen, purify for 30 minutes, and pass nitrogen after cooling, please refer to figure 1 In situ assembly. Under the conditions of pressure 8GPa and temperature 1600-2200K, grow for 25 seconds, then cool and release the pressure to obtain a gradient nano-microstructure polycrystal with a diameter of 4 mm and a height of 5 mm.

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Abstract

The invention provides a polycrystalline superhard material with a gradient nano-micro structure and a synthesis method thereof. The material and the synthesis method thereof are characterized in that: (1) the material has a nano-micro structure and no obvious crystal boundary, and a component structure can be designed to be gradient; (2) interacted growth is generated among BxCyNz subcrystals which serve as an internal superhard component; (3) growth stress generated by the inconsistent crystal orientations of the subcrystals is dispersed in the nano-micro structure, so that the internal concentrated stress is not formed; (4) a material preparation method provided by the invention comprises the steps of providing a 'nano material precursor' for growing the nano-micro structure, a growing subcrystal and a nano alloy powdered catalyst for use in the growth of the subcrystals, keeping the nano activity of the nano material precursor to form a packaged growing precursor and finally, growing the polycrystalline superhard material with the gradient nano-micro structure; and (5) the polycrystalline superhard material with the gradient nano-micro structure mainly comprises the following superhard components: BxCyNz and the carbide or nitride and the like of elements such as Ti, V, Si and the like. Compared with the prior art, the polycrystalline superhard material with the gradient nano-micro structure and the synthesis method thereof realize the gradient design growth, hardness and roughness of the polycrystalline superhard material BxCyNz with the nano-micro structure by using the nano material and the nano catalyst.

Description

【Technical field】 [0001] The invention relates to a gradient nano-microstructure polycrystalline superhard material and a synthesis method thereof. 【Background technique】 [0002] With the development of new material technology and modern manufacturing, especially the development of industries such as automobiles, aerospace, oil drilling, wire and cable, wood, and optical equipment, these related industries not only use basic materials in hardness, wear resistance, strength, etc. And other performance aspects have been greatly improved, and at the same time, there are higher requirements for the processing accuracy of these related material parts. "If a worker wants to be good at himself, he must first sharpen his tools." While modern manufacturing uses a large number of high-precision CNC equipment, it also puts forward higher requirements for modern tool materials and tool products. [0003] As we all know, diamond is the material with the highest hardness found so far. I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/60C30B28/06
Inventor 张传林
Owner BEIJING QINGDAWEINA TECH
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