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Thermite for hypergravity-assisted combustion synthesis of copper-based composite material

A copper-based composite material and assisted combustion technology, applied in thermite field, can solve the problems of reaction stability, combustion rate and temperature controllable product purity that are difficult to meet the high-gravity assisted combustion synthesis process, and achieve high heat release, Effect of low splatter rate

Active Publication Date: 2014-05-14
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Common aluminothermic reaction systems, such as Al-CuO system and CaSi 2 -CuO system, with different combustion rates and combustion temperatures, is mainly used for welding, and it is difficult to meet the needs of high-gravity assisted combustion synthesis processes in terms of reaction stability, combustion rate and temperature controllability, product purity, etc.

Method used

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  • Thermite for hypergravity-assisted combustion synthesis of copper-based composite material
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  • Thermite for hypergravity-assisted combustion synthesis of copper-based composite material

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Effect test

Embodiment 1

[0030] The thermite used for high-gravity assisted combustion synthesis of copper-based composites is composed of CuO powder with a gradient of particle size and Al powder with a gradient of particle size, and added Cu 2 O powder, MgO powder and CaF 2 The powder is obtained after mixing; the composition and formulation of the thermite are shown in Table 1.

[0031] Table 1

[0032]

[0033] The copper-based composite material is prepared by using the above-mentioned thermite used for high-gravity assisted combustion synthesis of copper-based composite materials:

[0034] (1) Preparation of raw materials: Weigh 200g of various raw materials according to the formula of the thermite in the selected table 1, and mix the various raw materials for 60 minutes at 50 revolutions per minute using a ball mill to obtain the thermite;

[0035] (2) Batch forming: the thermite obtained by mixing uniformly in step (1) is pressed into a thermite body with a diameter of 40 mm under 10 MPa;

[0036] (3) L...

Embodiment 2

[0039] The thermite used for high-gravity assisted combustion synthesis of copper-based composites is composed of CuO powder with a gradient of particle size and Al powder with a gradient of particle size, and added Cu 2 O powder, Cu powder, MgO powder and CaF 2 The powder is obtained after mixing; the composition and formulation of the thermite are shown in Table 2.

[0040] Table 2

[0041]

[0042] The copper-based composite material is prepared by using the above-mentioned thermite used for high-gravity assisted combustion synthesis of copper-based composite materials:

[0043] (1) Preparation of raw materials: Weigh 200g of various raw materials according to the formula of the thermite in the selected table 2, and mix the various raw materials for 60 minutes at 50 revolutions per minute using a ball mill to obtain the thermite;

[0044] (2) Batch forming: the thermite obtained by mixing uniformly in step (1) is pressed into a thermite body with a diameter of 40 mm under 10 MPa;

[...

Embodiment 3

[0048] The thermite used for high-gravity assisted combustion synthesis of copper-based composites is composed of CuO powder with a gradient of particle size and Al powder with a gradient of particle size, and added Cu 2 O powder, Cu powder, MgO powder and CaF 2 The powder is obtained after mixing; the composition and formulation of the thermite are shown in Table 3.

[0049] table 3

[0050]

[0051] The copper-based composite material is prepared by using the above-mentioned thermite used for high-gravity assisted combustion synthesis of copper-based composite materials:

[0052] (1) Preparation of raw materials: Weigh 200g of various raw materials according to the formula of the thermite in the selected table 3, and mix the various raw materials for 30 minutes at 100 revolutions per minute using a ball mill to obtain the thermite;

[0053] (2) Batching molding: the thermite obtained by mixing uniformly in step (1) is pressed into a thermite body with a diameter of 40 mm under 15 MPa...

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Abstract

The invention belongs to the technical field of combustion synthesis preparation, and in particular relates to a thermite for hypergravity-assisted combustion synthesis of a copper-based composite material. According to the thermite provided by the invention, the formula employs a CuO powder with particle size in gradient distribution and an Al powder with particle size in gradient distribution, combustion rate and heat release amount in the preparation of the copper-based composite material is controlled by adding a Cu2O powder, a Cu powder, a MgO powder and a CaF2 powder, so as to realize stability and controllability of thermit reaction in the supergravity field. The thermite provided by the invention has the advantages of low sputtering rate, high heat release amount, stability and controllability, and is suitable for hypergravity-assisted combustion synthesis of various copper-based composite materials.

Description

Technical field [0001] The invention belongs to the technical field of combustion synthesis preparation, and specifically relates to a thermite agent used for supergravity assisted combustion synthesis of copper-based composite materials. Background technique [0002] Copper-based composite materials can give full play to the high electrical conductivity and high thermal conductivity of the matrix Cu, and the high strength, high hardness, and low thermal expansion coefficient of the reinforced phase or composite layer, and have excellent comprehensive physical and mechanical properties. According to the characteristics of composite, copper-based composite materials can be divided into three types: particle-reinforced, fiber-reinforced, and flat copper-clad. The particle reinforcement phase in the common particle reinforcement type includes W, Al 2 O 3 , SiC, AlN, diamond, etc. The fiber-reinforced phase in fiber-reinforced type includes C fiber, B fiber, SiC fiber, tungsten wire,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B5/04C22C9/00C22C1/10
Inventor 李江涛贺刚郭世斌刘光华
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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