Al2O3/ZrO2 (Y2O3) nano composite ceramic tool material and its preparing method

A ceramic tool and nano-composite technology, applied in the field of cutting processing, can solve problems such as improving processing efficiency limitations, achieve the effects of reducing processing costs, meeting cutting conditions, and improving cutting efficiency

Inactive Publication Date: 2005-12-21
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are deficiencies in tool materials and manufacturing methods. Generally, hot pressing and normal pressure sintering processes are used, and the original powder particles are relatively large, which are micron-sized, so that the performance of different system ceramic tool materials can meet the cutting processing conditions and improve processing efficiency. etc. are restricted

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Firstly, the matrix material and toughening phase nanopowder were prepared by wet chemical method.

[0022] Preparation of aluminum hydroxide precipitation: firstly, using aluminum nitrate as raw material to prepare aluminum nitrate aqueous solution with a concentration of 0.2 mol / L, using ammonia water with a concentration of 3 mol / L as a precipitating agent, adding ammonia water dropwise to the aluminum nitrate solution to carry out the precipitation reaction , the reaction was carried out under the condition of a magnetic stirrer, and the pH value of the solution was adjusted to 8 after the precipitation reaction to obtain aluminum hydroxide precipitation.

[0023] Preparation of zirconium and yttrium hydroxide precipitation: firstly prepare zirconium salt and yttrium salt solutions respectively, and zirconium oxychloride (ZrOCl) is used as the zirconium salt. 2 ·8H 2 O), yttrium salt selects Y 2 O 3 Yttrium trichloride (YCl) obtained after mixing with HCl 3 ), t...

Embodiment 2

[0030] Firstly, the matrix material and toughening phase nanopowder were prepared by wet chemical method.

[0031] Preparation of aluminum hydroxide precipitation: firstly, using aluminum nitrate as raw material to prepare aluminum nitrate aqueous solution with a concentration of 0.8 mol / L, using ammonia water with a concentration of 4 mol / L as a precipitating agent, adding ammonia water dropwise to the aluminum nitrate solution to carry out the precipitation reaction , the reaction was carried out under the condition of a magnetic stirrer, and the pH value of the solution was adjusted to 9 after the precipitation reaction to obtain aluminum hydroxide precipitation.

[0032] Preparation of zirconium and yttrium hydroxide precipitation: firstly prepare zirconium salt and yttrium salt solutions respectively, and zirconium oxychloride (ZrOCl) is used as the zirconium salt. 2 ·8H 2 O), yttrium salt selects Y 2 O 3 Yttrium trichloride (YCl) obtained after mixing with HCl 3 ), t...

Embodiment 3

[0038] Firstly, the matrix material and toughening phase nanopowder were prepared by wet chemical method.

[0039] Preparation of aluminum hydroxide precipitation: firstly, using aluminum nitrate as raw material to prepare an aqueous solution of aluminum nitrate with a concentration of 0.5 mol / L, using ammonia water with a concentration of 3.5 mol / L as a precipitating agent, adding ammonia water dropwise to the aluminum nitrate solution for precipitation The reaction was carried out under the condition of a magnetic stirrer, and the pH value of the solution was adjusted to 8.5 after the precipitation reaction to obtain aluminum hydroxide precipitation.

[0040] Preparation of zirconium and yttrium hydroxide precipitation: firstly prepare zirconium salt and yttrium salt solutions respectively, and zirconium oxychloride (ZrOCl) is used as the zirconium salt. 2 ·8H 2 O), yttrium salt selects Y 2 O 3 Yttrium trichloride (YCl) obtained after mixing with HCl 3 ), the concentrati...

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Abstract

This is a kind of Al2O3/ZrO2(Y2O3) nanometer compound ceramics knife material and its producing method. The material components include substance material and tenacity increasing phase. The substance material is Al2O3, and its grain granularity is 60 - 200 nm; according to volume percentage, its content is 65% - 90%, and the tenacity increasing phase ZrO2(Y2O3) nanometer powder containing 1.5% - 3.5% Y2O3 according to mol percentage; its grain granularity is 50 - 100 nm, and according to volume percentage, its content is 10% - 35%; its producing craft steps include producing substance material and nanometer powder of tenacity increasing phase by hydrochemistry method, produce grains, prepare material, ball mill to mix material, flan equal static pressure molding and sinter. The anti-bending strength of the prepared ceramics knife material ªÊ= 750 - 950 MPa, the fracture toughness KIC = 7.8 - 9.6 MPaíñm1/2, Weibull modulus m = 10 - 11.7, and durable intensity can get to 4 - 6 hours.

Description

technical field [0001] The invention relates to a ceramic cutting tool material in the field of cutting and a preparation method thereof. Background technique [0002] Machining occupies an important position in the field of machining, and the tool material plays a decisive role. A research report by the International Association for Research in Mechanical Production Technology (CIRP) pointed out: "The emergence of each new tool material will make the ability and level of machining a big step forward". Tool material is the most important factor affecting cutting technology, while tool geometry parameters and tool structure are secondary factors. The development of tool materials over the past century has changed from carbon tool steel, high-speed steel, cemented carbide, TiC-coated cemented carbide, Al 2 O 3 The emergence of coated cemented carbide to new ceramic tools has improved the cutting efficiency. The development of aviation, aerospace and various ultra-high temp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10
Inventor 孙旭东马伟民修稚萌闻雷铁维麟李晓东霍地
Owner NORTHEASTERN UNIV
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