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Randomly-distributed short tungsten fiber reinforced CuW composite and preparation method thereof

A composite material and random distribution technology, applied in the field of composite material preparation, can solve problems such as restricting application fields, and achieve the effect of ensuring strengthening effect, improving mechanical properties, and improving comprehensive mechanical properties

Inactive Publication Date: 2019-10-18
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many studies have reported that adding a layered two-dimensional tungsten fiber network can effectively improve the mechanical properties of CuW composites, but the improvement of the mechanical properties often shows strong anisotropy, that is, only the loading on the plane where the tungsten fiber network is located There is an improvement in mechanical properties in the direction, which greatly limits its application fields

Method used

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  • Randomly-distributed short tungsten fiber reinforced CuW composite and preparation method thereof
  • Randomly-distributed short tungsten fiber reinforced CuW composite and preparation method thereof
  • Randomly-distributed short tungsten fiber reinforced CuW composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Preliminary preparation: Cut the commercially available drawn tungsten fiber wire with a diameter of 20 μm into short tungsten fibers with a length of 2 mm through a cutting machine;

[0056] The preparation method of randomly distributed short tungsten fiber reinforced CuW composite material is specifically implemented according to the following steps:

[0057] Step 1, weigh raw materials

[0058] Weigh 10% of Cu powder, 75% of W powder, and 15% of short tungsten fiber according to mass percentage, and the sum of the mass percentages of the above components is 100%;

[0059] Step 2, Mixing

[0060]The short tungsten fiber, W powder and Cu powder weighed in step 1 are mixed to obtain a composite product;

[0061] Step 3, prepare the composite material green body

[0062] Put the composite product obtained in step 2 into a cold pressing mold, pre-press it under a pressure of 300MPa, and form a composite material green body after holding the pressure for 90s;

[0063]...

Embodiment 2

[0068] Preliminary preparation: Cut the commercially available drawn tungsten fiber wire with a diameter of 1 μm into short tungsten fibers with a length of 0.5 mm through a cutting machine;

[0069] The preparation method of randomly distributed short tungsten fiber reinforced CuW composite material is specifically implemented according to the following steps:

[0070] Step 1, weigh raw materials

[0071] Weigh 30% of Cu powder, 60% of W powder, and 10% of short tungsten fiber according to the mass percentage, and the sum of the mass percentages of the above components is 100%;

[0072] Step 2, Mixing

[0073] The short tungsten fiber, W powder and Cu powder weighed in step 1 are mixed to obtain a composite product;

[0074] Step 3, prepare the composite material green body

[0075] Put the composite powder obtained in step 2 into a cold pressing mold, pre-press it under a pressure of 20MPa, and form a composite material green body after holding the pressure for 120s;

[...

Embodiment 3

[0081] Preliminary preparation: Cut the commercially available drawn tungsten fiber wire with a diameter of 100 μm into short tungsten fibers with a length of 5 mm through a cutting machine;

[0082] The preparation method of randomly distributed short tungsten fiber reinforced CuW composite material is specifically implemented according to the following steps:

[0083] Step 1, weigh raw materials

[0084] Weigh 9.5% of Cu powder, 90% of W powder, and 0.5% of short tungsten fiber according to mass percentage, and the sum of the mass percentages of the above components is 100%;

[0085] Step 2, mixing materials;

[0086] The short tungsten fiber, W powder and Cu powder weighed in step 1 are mixed to obtain a composite product;

[0087] Step 3, prepare the composite material green body

[0088] Put the composite product obtained in step 2 into a cold pressing mold, pre-press it under a pressure of 400MPa, and form a composite material green body after holding the pressure for...

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Abstract

The invention discloses a randomly-distributed short tungsten fiber reinforced CuW composite. The randomly-distributed short tungsten fiber reinforced CuW composite is prepared from following raw materials in percent by mass including: 9.5%-30% of Cu powder, 60%-90% of W powder and 0.5%-15% of short tungsten fibers, wherein the sum of the mass percents of the components is 100%. The mechanical performance such as stretching, compression and frictional wear of the composite is remarkably improved. The invention further provides a preparation method of the composite. The preparation method specifically includes the steps that 1, 9.5%-30% of Cu powder, 60%-90% of W powder and 0.5%-15% of short tungsten fibers are weighed according to the mass percents, wherein the sum of the mass percents ofthe components is 100%; 2, the components are mixed; 3, a composite blank is prepared; 4, the composite blank is subjected to hot-pressed sintering; and 5, the composite blank obtained after hot-pressed sintering in S4 is subjected to copper infiltration. By means of the method, the comprehensive mechanical performance of the composite can be remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a randomly distributed short tungsten fiber reinforced CuW composite material, and also relates to a preparation method of the randomly distributed short tungsten fiber reinforced CuW composite material. Background technique [0002] CuW composite material is a pseudo-alloy composed of W with high melting point and high hardness and Cu with high electrical and thermal conductivity. Because of its good arc erosion resistance, welding resistance, high strength and high hardness, it is widely used as electrical contact material, resistance welding, EDM and plasma electrode material; in aerospace and military industry In terms of high density and high strength, it is used to make armor-piercing projectile cores, armor-piercing projectiles, navigator gyro rotors, counterweights, etc.; in recent years, in terms of microelectronics technology, due to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C47/14C22C49/10C22C111/02
CPCC22C47/14C22C49/10
Inventor 卓龙超赵昭梁淑华罗斌张一恒张俊璐张慧刘冬雪张琪琪
Owner XIAN UNIV OF TECH
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