Method for preparing copper-molybdenum alloy powder
A technology of copper-molybdenum alloy and powder, which is applied in the field of copper-molybdenum alloy and preparation of copper-molybdenum alloy powder, can solve the problems affecting the performance and application of W-Cu composite materials, poor density of copper-molybdenum alloy powder, etc., and achieves shortened preparation time, The effect of large synthesis amount and small investment
Active Publication Date: 2014-09-10
SHANGHAI INST OF TECH
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Problems solved by technology
[0005] In view of the defects in the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a method for preparing copper-molybdenum alloy powder. Alloy powder has poor density, which seriously affects the performance and application of W-Cu composite materials
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[0024] With 95ml of 0.01mol / L sodium molybdate solution as anolyte, 90ml of 0.01mol / L hydrochloric acid solution as catholyte, copper sheet as anode and titanium mesh as cathode, electrolyze 306S at a constant current of 0.6A (electrolysis Time is according to Na + The theoretical electricity consumed by all the ions transferred to the cathode chamber is calculated, that is, ), to obtain electrolysis products.
[0025] The electrolyzed product was washed three times with deionized water, and then placed in a blast drying oven at a constant temperature of 60° C. for 2 hours to obtain a pure copper-molybdenum precursor compound.
[0026] The precursor was put into a tube furnace and reduced at 400°C for 2 hours at a heating rate of 2.5°C / min in a hydrogen atmosphere, and then reduced at 700°C for 5 hours to obtain copper-molybdenum alloy powder. The XRD analysis results of copper-molybdenum alloy powder are as follows: figure 2 , EDS energy spectrum analysis results such as...
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The invention relates to a method for preparing copper-molybdenum alloy powder. According to the method, a copper sheet is used as an anode, a noble electrode is used as a cathode, sodium molybdate solution is used as anodic solution, solution with pH ranging from 0 to 14 is used as cathodic solution, electrolyzation is performed for 3-30 minutes under the constant current 1-100mA / cm<2> or constant voltage 10-300V, the sodium molybdate solution is electrolyzed with a cation membrane, a product obtained is cleaned and dried so as to obtain copper-molybdenum compound precursor, and the copper-molybdenum compound precursor is subjected to high temperature reduction in the hydrogen atmosphere so as to obtain copper-molybdenum alloy powder. The method has the advantages that Na+ is transferred to a cathode chamber under the electrolytic action of the cation membrane, an anodic product has no foreign ions, and the copper-molybdenum alloy powder mixed well is obtained by hydrogen reduction.
Description
technical field [0001] The invention belongs to the field of metal materials, and relates to a copper-molybdenum alloy, in particular to a method for preparing copper-molybdenum alloy powder. technical background [0002] Copper-molybdenum composite powder is the raw material for preparing copper-molybdenum composite materials, and its particle size, cleanliness, and mixing uniformity directly affect the performance of copper-molybdenum composite materials. Copper-molybdenum materials have the following characteristics: high electrical conductivity and thermal conductivity; low and adjustable thermal expansion coefficient; special high temperature performance; non-magnetic; low gas content and good vacuum performance; good machinability. Copper-molybdenum materials have broad application prospects: vacuum switch electrical contacts; electric vacuum heat dissipation components; instrumentation component materials; aerospace and weapon materials. It can also be used as a soli...
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Login to View More IPC IPC(8): B22F9/26C25B1/00C25B13/08
Inventor 张全生闵凡奇李海燕李硕李细方王淼党国举王昭勍
Owner SHANGHAI INST OF TECH