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Conductive, wearable composite material in TiN-TZP series and preparation method thereof

A technology of composite materials and sintering aids, which is applied in the field of advanced ceramic materials, TiN-TZP series conductive and wear-resistant composite materials and its preparation, can solve the problem of not involving the material resistivity and wear rate indicators, and reduce the TiN-zirconia ceramic materials. Solve the problems of sintering temperature and low material strength, and achieve the effect of simple preparation method, low cost and convenient mass production

Inactive Publication Date: 2005-10-26
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

European patent EP0157487, Japanese patent JP60180958 and Canadian patent CA1227222 provide a preparation method of TiN-zirconia ceramic material, the content of zirconia is 55-96% by volume, which is the main component, and the material properties only involve hardness, density and strength, but the obtained The material strength is very low and overall it is far from the invention
Although the strength of the TiN-zirconia ceramic material provided by the world patent WO8800578 is higher than that of the European patent EP0157487, it is still relatively low. It can replace WC tools and has corrosion resistance.
Except this, do not see the bibliographical report similar to the feature of the present invention, especially all do not relate to the material that has electric conduction wear-resisting property simultaneously and adopt effective sintering aid to reduce the sintering temperature of TiN-zirconia ceramic material, do not involve Material resistivity and wear rate indicators

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Take 15 grams of TiN, 85 grams of TZP, plus 5 grams of sintering aid (SiO 2 2 grams, Al 2 o 3 1.5 grams, B 2 o 3 0.5 g, Na 2 O 0.5 g, MgO 0.5 g), uniformly mixed by ball milling, using deionized water as medium and adding 2.5 g of polyacrylic acid, ball milling time 8 hours, molding by dry pressing (100MPa) + isostatic pressing (200MPa), in the flow Sintering at 1450°C under normal pressure in a nitrogen atmosphere, with a heating rate of 5°C / min, and holding at 1450°C for 2 hours to obtain a sintered body. After sintering, the material has the following properties: resistivity: 9×10 -2 Ω cm; bending strength: 500MPa; fracture toughness: 6MPa m 1 / 2 ; Wear rate: 500nm / h.

Embodiment 2

[0017] Take 40 grams of TiN, 60 grams of TZP, plus 8 grams of sintering aid (SiO 2 2 grams, Al 2 o 3 1.5 grams, B 2 o 3 0.5 g, Na 2 O 0.5g, MgO 0.5g, TiO 2 1 gram, Y 2 o 3 1 g, La 2 o 3 1 g), uniformly mixed by ball milling, using deionized water as medium and adding 3 g of polyvinyl alcohol, ball milling time 8 hours, molding by dry pressing (100MPa) + isostatic pressing (200MPa), in a nitrogen atmosphere at 1500 ° C Pressure sintering, the heating rate is 5°C / min, and the temperature is kept at 1500°C for 2.5 hours to obtain a sintered body. After sintering, the material has the following properties: Resistivity: 2.5×10 -3 Ω cm; bending strength: 460MPa; fracture toughness: 5.5MPa m 1 / 2 ; Wear rate: 400nm / h.

Embodiment 3

[0019] Take 55 grams of TiN, 45 grams of TZP, plus 10 grams of sintering aid (SiO 2 3 grams, Al 2 o 3 2 grams, B 2 o 3 1 g, Na 2 O 0.5g, MgO 0.5g, TiO 2 1 gram, Y 2 o 3 1 g, La 2 o 3 1 gram), uniformly mixed by ball milling, using deionized water as medium and adding 3 grams of methylcellulose, ball milling time 8 hours, molding by dry pressing (100MPa) + isostatic pressing (200MPa), in a nitrogen atmosphere at 1530 °C pressure sintering, the heating rate is 5 °C / min, and the temperature is kept at 1530 °C for 3 hours to obtain a sintered body. After sintering, the material has the following properties: resistivity: 0.8×10 -3 Ω·cm; bending strength: 400MPa; fracture toughness: 5MPa·m 1 / 2 ; Wear rate: 300nm / h.

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Abstract

The present invention discloses a TiN-TZP system conductive wear-proof composite material and its preparation method. Said composite material composition includes (by mass%) TiN 10-60% and TZP 40-90%, besides adds sintering adjuvant whose added quantity is 0.5-15% of total weight of TiN and TZP. Its preparation process includes the following steps: mixing materials, ball-grinding and mixing, adding dispersing agent, placing the mixed material into mould, dry-pressing and forming, sintering at 1450-1550 deg.C under the condition of nitrogen gas atmosphere and normal pressure, heat-insulating, naturally cooling so as to obtain the invented material.

Description

technical field [0001] The invention relates to a TiN-TZP series conductive wear-resistant composite material and a preparation method thereof, belonging to advanced ceramic material technology. Background technique [0002] Titanium nitride (TiN) is a new type of non-oxide material, which has the characteristics of high hardness (microhardness 21GPa), high melting point (2950°C), good chemical stability, and high bonding energy between Ti-N, so It is a good refractory and wear-resistant material. Titanium nitride ceramics themselves or in combination with other substances (such as Ti(C 1-x N x ) solid solution, TiN combined with other ceramics or alloys, etc.) or form a thin film on other substrate materials by chemical vapor deposition, all of which have high hardness and good wear resistance, and are mainly used in wear-resistant occasions, such as: cutting tools (Including block material tools and coated tools), wire drawing dies, etc., the wear resistance of TiN has ...

Claims

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Application Information

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IPC IPC(8): C04B35/48
Inventor 郭瑞松彭珍珍尹自光杨正方
Owner TIANJIN UNIV