Molybdenum copper alloy foil sheet and preparation method thereof

A technology of molybdenum-copper alloy and foil, which is applied in the field of molybdenum-copper alloy foil and its preparation, can solve the problems of low density and poor processing performance of molybdenum-copper alloy, achieve high density, reduce rolling process, and improve alloy quality effect

Active Publication Date: 2013-06-26
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention adopts high-energy ball milling treatment + infiltration sintering and suitable rolling process to solve the problems of poor deformation processability and low density of existing molybdenum-copper alloys

Method used

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  • Molybdenum copper alloy foil sheet and preparation method thereof

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preparation example Construction

[0026] The preparation method of the molybdenum-copper alloy foil whose copper mass percentage is 20-50% and the balance is molybdenum of the present invention comprises the following steps in sequence:

[0027] 1) Take copper powder accounting for 1 / 4 to 2 / 5 of the design content weight, such as copper powder with a mass percentage of 5% to 20%, and molybdenum powder with the same mass percentage as the molybdenum-copper alloy foil design content, The method of high-energy ball milling is used for mixing; the inner wall of the material tank, the grinding ball and the stirring rod are all made of dispersion-strengthened copper materials for high-energy ball milling; the time of high-energy ball milling is 8 to 14 hours. The internal pressure is maintained at 0.2-0.3MPa.

[0028] 2) Molding the ball-milled powder into a slab with a thickness of 10-14 mm to obtain a molybdenum-copper alloy compact.

[0029] 3) Pre-sintering the green compact in a hydrogen furnace, the sintering...

Embodiment 1

[0033] A molybdenum-copper alloy foil with a thickness of 0.1-1.0mm, the molybdenum-copper alloy foil includes the following components and content (weight): 80% molybdenum and 20% copper. Its preparation process comprises the following steps:

[0034] 1) Take the copper powder with a mass percentage of 7%, and the molybdenum powder with the same mass percentage (80%) as the molybdenum-copper alloy foil, and mix them for 14 hours by high-energy ball milling; the high-energy ball mill adopts the inner wall of the material tank, Both the grinding ball and the stirring rod are made of dispersion-strengthened copper material; argon gas is introduced during the ball milling process, and the pressure in the ball grinding tank is maintained at 0.2MPa;

[0035] 2) molding the powder after ball milling into a slab with a thickness of 12 mm to obtain a molybdenum-copper alloy compact;

[0036] 3) Place the compact in a hydrogen furnace for pre-sintering at a sintering temperature of 90...

Embodiment 2

[0041] A molybdenum-copper alloy foil with a thickness of 0.1-1.0mm, the molybdenum-copper alloy foil includes the following components and contents (weight): 70% molybdenum and 30% copper. Its preparation process comprises the following steps:

[0042] 1) Take copper powder with a mass percentage of 10%, and molybdenum powder with the same mass percentage as the molybdenum-copper alloy foil, and mix them for 10 hours by means of high-energy ball milling; The rods are all made of dispersion-strengthened copper; argon gas is introduced during the ball milling process, and the pressure in the ball mill tank is maintained at 0.3MPa;

[0043] 2) molding the powder after ball milling into a slab with a thickness of 10 mm to obtain a molybdenum-copper alloy compact;

[0044] 3) Pre-sintering the green compact in a hydrogen furnace at a sintering temperature of 800°C for 1 hour;

[0045] 4) According to the composition ratio of the molybdenum-copper alloy foil, the additional 20% c...

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Abstract

The invention provides a molybdenum copper alloy foil sheet and a preparation method thereof. The thickness of the molybdenum copper alloy foil sheet is 0.1-1.0mm. Molybdenum phases and copper phases are uniformly distributed in a short-fiber mode. The copper phases are in lap joint with each other. The molybdenum copper alloy foil sheet comprises 20wt%-50wt% of copper with the balance being molybdenum. The preparation method includes the steps of carrying out compression moulding, presintering and infiltration sintering on mixed powder after the mixed powder is subjected to high-energy ball-milling treatment, obtaining a molybdenum copper alloy plate, and carrying out hot rolling, heat treatment and cold rolling on the molybdenum copper alloy plate to obtain the molybdenum copper alloy foil sheet. Through adoption of the high-energy ball-milling treatment, the infiltration sintering and appropriate rolling process, the molybdenum copper alloy foil sheet and the preparation method thereof solve the problems that existing molybdenum copper alloy is poor in deformation processing performance and low in density. The molybdenum copper alloy foil sheet prepared through the method is smooth and clean in surfaces and excellent in thermal conductance performance, has more than 99% of high density, and is applicable for the field of preparation and application of electronic packaging materials and heat sink materials.

Description

technical field [0001] The invention relates to a molybdenum-copper alloy foil and a preparation method thereof, which can be widely used in technical fields such as electronic packaging materials, electrical contact materials, and heat sink materials. Background technique [0002] Molybdenum-copper alloy is a kind of composite material composed of molybdenum and copper, which is evenly distributed in two phases and neither solid solution nor compound. It has the high melting point and low expansion performance of molybdenum and the high electrical and thermal conductivity of copper. The mutual insolubility between the two components makes them present a specific combination of the performance of the two elements after compounding, and the components can be flexibly and accurately designed according to the requirements of use. Due to these excellent properties, molybdenum-copper alloys are widely used in electronic packaging materials, electrical contact materials, heat sink...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00C22C9/00C22C27/04C22C30/02B22F3/16B22F7/04B22F9/04C22F1/08C22F1/18C22F1/00
Inventor 李增德雷虎林晨光崔舜
Owner GRIMAT ENG INST CO LTD
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