In-situ reaction synthesis method of TiC/Ni composite material

An in-situ reaction and composite material technology, applied in the field of composite materials, can solve problems such as high cost, complex process, and equipment limitations, and achieve the effects of increased density, uniform particle distribution, and simple process

Active Publication Date: 2021-06-04
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0010] Aiming at the problems that the existing TiC / Ni composite material is sintered and pressurized in-situ reaction synthesis technology is limited by equipment, the process is complicated, and the cost is high, the present invention provides an in-situ reaction synthesis method of TiC / Ni composite material. Dense TiC / Ni Composites Prepared by Pressure Reaction Sintering

Method used

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  • In-situ reaction synthesis method of TiC/Ni composite material
  • In-situ reaction synthesis method of TiC/Ni composite material
  • In-situ reaction synthesis method of TiC/Ni composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: Taking the mass fraction of Ni as 60wt% of the total system as an example

[0035] ① Preparation of mixed powder: Ni powder (purity ≥ 99.9%, particle size 1-3 μm); Ti powder (purity ≥ 99.9%, particle size 1-3 μm); graphite powder (purity ≥ 99.9%, particle size 1-5 μm), three The seed powder and 3wt.% PVB are mixed evenly with a planetary ball mill using ethanol as a solvent;

[0036] ②Body preparation: put the mixed powder obtained in ① into a cylindrical mold with a diameter of 13.00mm, apply a pressure of 4-6MPa, prepare a cylindrical tablet sample with a diameter of 13.00mm, and perform cold isostatic Press molding to prepare green body.

[0037] ③Reaction sintering without pressurization: put the green body obtained in ② into a tube furnace, and pass it into atmospheric pressure argon for atmosphere protection, slowly raise the temperature at a heating rate of 1°C / min, and wait until the temperature in the furnace rises to 1300°C. The TiC / Ni composit...

Embodiment 2

[0041] Embodiment two: take the mass fraction of Ni as 40wt% of the total system as an example

[0042] ① Preparation of mixed powder: Ni powder (purity ≥ 99.9%, particle size 1-3 μm); Ti powder (purity ≥ 99.9%, particle size 1-3 μm); graphite powder (purity ≥ 99.9%, particle size 1-5 μm), three The seed powder and 3wt.% PVB are mixed evenly with a planetary ball mill using ethanol as a solvent;

[0043] ②Body preparation: put the mixed powder obtained in ① into a cylindrical mold with a diameter of 13.00mm, apply a pressure of 4-6MPa, prepare a cylindrical tablet sample with a diameter of 13.00mm, and perform cold isostatic Press molding to prepare green body.

[0044] ③Reaction sintering without pressurization: put the green body obtained in ② into a tube furnace, and pass it into atmospheric pressure argon for atmosphere protection, slowly raise the temperature at a heating rate of 1°C / min, and wait until the temperature in the furnace rises to 1300°C. The TiC / Ni composit...

Embodiment 3

[0048] Embodiment 3: Taking the mass fraction of Ni as 70wt% of the total system as an example

[0049] ① Preparation of mixed powder: Ni powder (purity ≥ 99.9%, particle size 1-3 μm); Ti powder (purity ≥ 99.9%, particle size 1-3 μm); graphite powder (purity ≥ 99.9%, particle size 1-5 μm), three The seed powder and 3wt.% PVB are mixed evenly with a planetary ball mill using ethanol as a solvent;

[0050] ②Body preparation: put the mixed powder obtained in ① into a cylindrical mold with a diameter of 13.00mm, apply a pressure of 4-6MPa, prepare a cylindrical tablet sample with a diameter of 13.00mm, and perform cold isostatic Press molding to prepare green body.

[0051] ③Reaction sintering without pressurization: put the green body obtained in ② into a tube furnace, and pass it into atmospheric pressure argon for atmosphere protection, slowly raise the temperature at a heating rate of 1°C / min, and wait until the temperature in the furnace rises to 1300°C. The TiC / Ni composit...

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Abstract

The invention relates to an in-situ reaction synthesis method of a TiC/Ni composite material. The method comprises the following steps that raw materials including Ni powder, Ti powder and graphite are uniformly mixed in proportion, a blank is prepared after cold press forming, then the heating rate is controlled to perform argon protection normal pressure sintering or vacuum sintering on the blank, exothermic chemical reaction occurs among the components at a certain temperature, and thus microscopic reinforcing particles in dispersed distribution are obtained. The material is mainly applied to the fields of aerospace, military, transportation tools, electronic components, fuel cell connectors, ceramic cutting tool materials and the like. In-situ reaction and densification of the TiC/Ni composite material are achieved in one step, complex processes such as high-energy ball milling and pressure sintering are not needed, thus the process is convenient and simple, is not limited by equipment and is low in cost, and the problem that an existing in-situ reaction synthesis technology of the high-density TiC/Ni composite material is limited by equipment, complex in process and high in cost can be effectively solved.

Description

technical field [0001] The invention belongs to the field of composite materials, and relates to an in-situ reaction synthesis technology of TiC / Ni composite materials; in particular, it relates to a dense TiC prepared by using Ni powder, Ti powder and graphite as raw materials through a pressureless reaction sintering method. / Ni composite material. Background technique [0002] Particle reinforced metal matrix composites have excellent properties such as high specific strength, specific modulus, high temperature resistance, wear resistance, small thermal expansion coefficient and good dimensional stability, and have become an important part of composite materials. Particle-reinforced metal matrix composites take into account the good toughness of metals and the high wear resistance of ceramics. They have incomparable excellent performance of single metal or ceramic materials, and also have relatively excellent fracture toughness and plasticity. As cutting tools and functio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C19/03C22C32/00C22C29/10
CPCC22C1/058C22C19/03C22C29/10C22C32/0052
Inventor 齐倩赵子燕姚树玉
Owner SHANDONG UNIV OF SCI & TECH
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