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Method for preparing molybdenum-copper alloy by combustion synthesis in supergravity field

A high-gravity field and molybdenum-copper alloy technology is applied in the field of combustion synthesis to prepare molybdenum-copper alloys, which can solve the problems of low purity and high porosity of bulk materials, and achieve the effects of high temperature, rapid reaction and simple process

Active Publication Date: 2016-03-09
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

[0004] Combustion synthesis technology has the characteristics of simple process, rapid reaction, high preparation temperature, etc. It is suitable for the preparation of various high melting point inorganic materials, but the obtained bulk materials usually have low purity and high porosity

Method used

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  • Method for preparing molybdenum-copper alloy by combustion synthesis in supergravity field
  • Method for preparing molybdenum-copper alloy by combustion synthesis in supergravity field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] CuO, Al, Mo, Cu, B 2 o 3 The raw materials are uniformly mixed according to the proportions shown in Table 1 and compacted to obtain a thermite prefabricated block with a relative density of 60%, and the obtained thermite prefabricated block is put into a graphite crucible and placed in a high-gravity device; then In a supergravity field with a vacuum degree of 1000Pa and a centrifugal force of 500g, the heat generated by the energized tungsten spiral wire induces a high-temperature thermite reaction between various raw materials in the thermite prefabricated block, and the product of the thermite reaction is the glass ceramic melt. The metal melt is rapidly separated, densified and cooled in a supergravity field to obtain a ceramic solid and a metal solid, and the pure copper layer at one end of the metal solid is removed to obtain a molybdenum-copper alloy.

[0017] Table 1

[0018] components

[0019] Carry out XRD to the obtained molybdenum-copper alloy ...

Embodiment 2

[0021] CuO, Al, Mo, Cu, B 2 o 3 The raw materials are uniformly mixed according to the proportion shown in Table 2 and compacted to obtain a thermite prefabricated block with a relative density of 50%, and the obtained thermite prefabricated block is put into a graphite crucible and placed in a high-gravity device; then In a supergravity field with a vacuum degree of 500Pa and a centrifugal force of 1000g, the heat generated by the electrified tungsten spiral wire induces a high-temperature thermite reaction between various raw materials in the thermite prefabricated block, and the product of the thermite reaction, the glass ceramic melt and The metal melt is rapidly separated, densified and cooled in a supergravity field to obtain a ceramic solid and a metal solid, and the pure copper layer at one end of the metal solid is removed to obtain a molybdenum-copper alloy.

[0022] Table 2

[0023] components

[0024] Carry out XRD, SEM to the obtained molybdenum-copper...

Embodiment 3

[0026] CuO, Al, Mo, Cu, B 2 o 3 The raw materials are uniformly mixed according to the proportions shown in Table 3 and compacted to obtain a thermite prefabricated block with a relative density of 40%, and the obtained thermite prefabricated block is put into a graphite crucible and placed in a high-gravity device; then In a supergravity field with a vacuum degree of 100Pa and a centrifugal force of 3000g, the heat generated by the energized tungsten spiral wire induces a high-temperature thermite reaction between various raw materials in the thermite prefabricated block, and the product of the thermite reaction is the glass ceramic melt. The metal melt is rapidly separated, densified and cooled in a supergravity field to obtain a ceramic solid and a metal solid, and the pure copper layer at one end of the metal solid is removed to obtain a molybdenum-copper alloy.

[0027] table 3

[0028] components

[0029] XRD, SEM analysis and density test were carried out on...

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Abstract

The invention belongs to the technical field of combustion synthesis, and particularly relates to a method for preparing molybdenum copper alloy by combustion synthesis in a high gravity field. The method of the invention adopts Al-CuO as a reaction system, and adopts Cu, Mo, and B2O3 as diluents. High temperature thermite reaction between various raw materials is induced in a high gravity field (500-5000g); rapid separation, densification, and cooling of the products of ceramic melt and metal melt of the thermite reaction in the high gravity field is realized to obtain a ceramic solid and a metal solid; and the pure copper layer at one end of the metal solid is cut to obtain the molybdenum copper alloy. The method of the invention has the characteristics of simple process, short preparation period, low cost, and the like.

Description

technical field [0001] The invention belongs to the technical field of combustion synthesis, and in particular relates to a method for preparing molybdenum-copper alloy by combustion synthesis in a supergravity field. Background technique [0002] Molybdenum-copper alloy is composed of mutually insoluble metals Mo and Cu. It combines the excellent properties of Mo and Cu. It has the advantages of good high-temperature strength, anti-ablation, high thermal conductivity and low thermal expansion coefficient. It is widely used in point contacts. , electrode materials, electronic packaging heat sink materials, rocket nozzles, aircraft throat linings and other fields. At present, the existing production methods of molybdenum copper alloy include high temperature liquid phase sintering method, infiltration method, hot pressing sintering method, discharge plasma sintering method and so on. However, the characteristics of large melting point difference, immiscibility and poor wetta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/00
Inventor 李江涛贺刚徐昆源钱学强郭世斌刘光华杨增朝
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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