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Preparing method for in-situ TiB2 particles and TiB whisker hybrid reinforced Cu-base composite material

A composite material and particle technology, applied in the field of powder metallurgy, can solve problems such as the decrease in electrical conductivity, and achieve the effects of comprehensive performance improvement, high electrical conductivity and hardness, and ease of strength and electrical conductivity.

Active Publication Date: 2017-12-29
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the invention is to provide a kind of powder metallurgy method to prepare in-situ TiB 2 The method of particle and TiB whisker hybrid reinforced Cu-based composite material realizes the hybrid reinforced Cu-based composite material with two different structures of Ti-B compounds. Reinforced Cu-based composites were overly dependent on the increase in the content to cause a severe decrease in electrical conductivity, and finally the mechanical properties of the composite were improved while maintaining high electrical conductivity

Method used

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  • Preparing method for in-situ TiB2 particles and TiB whisker hybrid reinforced Cu-base composite material
  • Preparing method for in-situ TiB2 particles and TiB whisker hybrid reinforced Cu-base composite material
  • Preparing method for in-situ TiB2 particles and TiB whisker hybrid reinforced Cu-base composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 11.94g of Ti powder, 2.70g of B powder (the atomic ratio of Ti and B is 1:1) and 11.94g of Ti powder and 5.40g of B powder (the atomic ratio of Ti and B is 1:2) and place them in the ball mill, KQM-X4Y formula The speed of the planetary ball mill is 500r / min, the ball-to-material ratio is 10:1 (stainless steel balls), and anhydrous ethanol with a mass fraction of 4% is added as a ball milling process control agent. The positive and negative rotation is switched every 10 minutes, and the setting time is 4h. ; Weigh 35g of electrolytic pure Cu powder, 0.177g of ball-milled composite powders with Ti and B atomic ratios of 1:1 and 1:2, and the ball-milled composite powders of the two ratios account for 1% of the total powder mass, and mix the powder Carry out mechanical mixing in the powder mixing machine, the speed of the powder mixing machine is 80r / min, and the setting time is 4h; the composite powder after mixing is cold-pressed into a prefabricated body of Φ21mm×1...

Embodiment 2

[0025] Weigh 17.91g of Ti powder, 2.70g of B powder (the atomic ratio of Ti and B is 1.5:1) and 11.94g of Ti powder and 5.40g of B powder (the atomic ratio of Ti and B is 1:2) and place them in a ball mill, KQM-X4Y The rotation speed of the type planetary ball mill is 400r / min, the ball-to-material ratio is 15:1 (stainless steel balls), and anhydrous ethanol with a mass fraction of 6% is added as a ball milling process control agent. 6h; Weigh 35g of electrolytically pure Cu powder, 0.541g of ball-milled composite powder with Ti and B atomic ratios of 1.5:1 and 1:2, and the ball-milled composite powder of the two ratios accounts for 3% of the total powder mass, and the mixed The powder is mechanically mixed in the powder mixer, the speed of the powder mixer is 120r / min, and the setting time is 8h; the mixed composite powder is cold-pressed into a prefabricated body of Φ21mm×10mm in a stainless steel mold (the pressure is 300MPa, Holding time is 30s), then placed in graphite mo...

Embodiment 3

[0028] Weigh 11.94g Ti powder, 2.70g B powder (the atomic ratio of Ti and B is 1:1) and 11.94g Ti powder, 6.75g B powder (the atomic ratio of Ti and B is 1:2.5) and place them in a ball mill, KQM- The X4Y planetary ball mill rotates at 300r / min, the ball-to-material ratio is 20:1 (stainless steel balls), and anhydrous ethanol with a mass fraction of 8% is added as a ball milling process control agent, and the positive and negative rotations are switched every 10 minutes. Time 8h; Weigh 35g of electrolytically pure Cu powder, 0.921g of ball-milled composite powder with Ti and B atomic ratios of 1:1 and 1:2.5, and the two ratios of ball-milled composite powder account for 5% of the total powder mass. The powder is mechanically mixed in a powder mixer, the speed of the mixer is 200r / min, and the setting time is 12h; the mixed composite powder is cold-pressed into a prefabricated body of Φ21mm×10mm in a stainless steel mold (the pressure is 350MPa , holding time is 35s), then plac...

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Abstract

The invention discloses a preparing method for in-situ TiB2 particles and a TiB whisker hybrid reinforced Cu-base composite material. Two composite powders with different proportions of Ti and B atom are prepared in a KQM-X4Y type planetary ball mill, and the two prepared Ti-B composite powers with different proportions and electrolytic pure Cu powder are mechanically blended in a blending machine according to a certain proportion, then cold press molding is conducted on the evenly blended composite powder in a stainless steel mold, and finally preparing for the TiB2 particles and the TiB whisker hybrid reinforced Cu-base composite material is finished by pressurized sintering in an atmosphere protecting furnace. The Cu-base composite material prepared through the preparing method has high electric conductivity and hardness at the same time, the problem that electric conductivity is decreased seriously due to excessive depending on increasing of the content in reinforcing of the Cu-base composite material by single structure reinforced phase is solved, the pair of contradictions of hardness and electric conductivity of the Cu-base composite material is relieved to a certain extent, and the comprehensive performance of the composite material is improved.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, in particular to a method for preparing in-situ TiB 2 Particle and TiB whisker hybrid reinforcement methods for Cu-based composites. Background technique [0002] Copper-based composite materials are widely used in contact wires, integrated circuit lead frames, electrical contacts, welding electrodes, engine cooling components, etc. These applications not only require materials to have good electrical and thermal conductivity, but also require mechanical properties such as high strength, high hardness, and high wear resistance. The existence of a pair of contradictory items makes the comprehensive performance of the composite material difficult At the bottleneck. TiB 2 Particles have the advantages of high hardness, high elastic modulus, high melting point, and low resistivity. Using this reinforcement to reinforce Cu-based composite materials can not only ensure the electrical condu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C9/00C22C32/00
CPCC22C1/05C22C9/00C22C32/0073
Inventor 梁淑华任建强姜伊辉邹军涛肖鹏
Owner XIAN UNIV OF TECH