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Microcrystal glass ceramic bond for diamond composite materials

A ceramic bond and composite material technology, applied in the field of diamond composite grinding tools, can solve the problems of reducing the bonding strength of diamond abrasive grains, reducing the service life of composite materials, increasing grinding costs, etc., to meet the requirements of high-speed grinding, analysis The effect of low crystal temperature and low thermal expansion coefficient

Inactive Publication Date: 2012-07-04
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The formation of large cracks reduces the bonding strength of the bond to the diamond abrasive grains, and the abrasive grains are easy to fall off during high-efficiency grinding, increasing the grinding cost and reducing the service life of the composite material

Method used

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  • Microcrystal glass ceramic bond for diamond composite materials
  • Microcrystal glass ceramic bond for diamond composite materials

Examples

Experimental program
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Effect test

preparation example Construction

[0017] The present invention adopts the conventional preparation method, Li with β-spodumene as main crystal phase 2 O-Al 2 o 3 -4SiO 2 Glass-ceramic as the basic binder, the introduction of B 2 o 3 / Na 3 AlF 6 / Na 2 O multi-component composite flux, after mixing uniformly by ball milling, it is melted into a glass melt at 1200-1400°C, water quenched, dried, and crushed into glass powder to obtain a binder, which is also the precursor of a glass-ceramic binder body. The powder sintering method is used to obtain the glass-ceramic bonding agent, and the sintering crystallization temperature is 680-780°C.

[0018] See Table 1 for specific examples of the basic glass powder and composite fluxing agent of the present invention.

[0019] Table 1

[0020]

[0021] See Table 2 for specific examples of the present invention's glass-ceramic binder and its performance test results.

[0022] Table 2

[0023]

[0024] The specific crystallization temperature of Examples 1...

Embodiment 5

[0025] Taking Example 5 as an example, the specific preparation process of the glass-ceramic bond for diamond composite material of the present invention is:

[0026] Weigh the components of the basic glass powder and the flux according to the formula, mix them uniformly through ball milling, melt them in a high-temperature furnace at 1400°C, and pass through a 200-mesh sieve through water quenching, drying, and sieve to obtain Precursor of glass-ceramics bond that can be crystallized by heat treatment. When the precursor of the glass-ceramic bond is used as a bond for diamond composite materials, after nucleation treatment at 650°C and crystallization treatment at 760°C, the glass powder can be crystallized and transformed into glass-ceramic, thus becoming a glass-ceramic bond. agent. Its coefficient of thermal expansion is 3.08×10 -6 / ℃, and the thermal expansion coefficient of diamond is 3.1×10 -6 / °C match. The bending strength of the diamond composite material prepare...

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Abstract

The invention discloses a microcrystal glass ceramic bond for diamond composite materials. The microcrystal glass ceramic bond is characterized in that 10 to 20 percent by weight of composite cosolvent is added in base glass powder in order to decrease the crystallizing temperature. The components of the base glass powder and the contents of the components in percentage by weight are as follows: 1 to 5 percent of Li2O, 15 to 27 percent of Al2O3, 55 to 70 percent of SiO2, 2 to 10 percent of MgO, 3 to 8 percent of ZnO and 2 to 6 percent of P2O5. The components of the composite cosolvent and the percentages by weight of the components are as follows: 1 to 45 percent of B2O3, 1 to 55 percent of Na3AlF6 and 1 to 60 percent of Na2O. The microcrystal glass ceramic bond with low thermal expansion coefficient, low crystallizing temperature and high strength, which is provided by the invention and is suitable for diamond composite materials, enhances the performance of diamond composite materials.

Description

technical field [0001] The invention relates to a diamond composite material grinding tool, in particular to a glass-ceramic bond for the diamond composite material. Background technique [0002] The remarkable performance of diamond is high hardness and excellent processing performance, and it has a wide range of applications in the field of grinding. All kinds of diamond composite grinding tools are widely used in machining, stone cutting, engineering construction, geological exploration, cutting of cemented carbide and other cutting-edge technology fields. The diamond composite material with diamond as abrasive has the following advantages in grinding: high grinding efficiency, good wear resistance, small grinding force, low grinding temperature, high precision of the ground workpiece, and good surface grinding quality. [0003] Although diamond abrasives have many superior properties, there is a vacant bond on the crystal surface that is not used, and it is easy to reac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C12/00
Inventor 朱玉梅赵加硕李志宏张庆彬
Owner TIANJIN UNIV
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