A kind of method for preparing alumina-dispersed copper by external oxidation
A technology of external alumina and dispersed copper, which is applied in the field of composite materials, can solve the problems of insufficient oxidation of pre-alloyed aluminum, degradation of material performance, and difficulty in cleaning, so as to reduce oxidation of copper powder, improve performance, and reduce oxidation of copper. Effect
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Embodiment 1
[0032] This embodiment includes the following steps:
[0033] Step 1. Perform sufficient external oxidation treatment on the aluminum-copper alloy powder to obtain external alumina-copper alloy powder; the aluminum-copper alloy powder is a powder formed by aluminum coating on the surface of copper particles, and the process of the sufficient external oxidation treatment is: Under atmospheric atmosphere, heat to 600℃ and then keep for 10h;
[0034] Step 2: Mix the outer alumina-copper alloy powder obtained in step 1 with copper powder to obtain a specific oxide alloy powder; the mass percentage of aluminum in the specific oxide alloy powder is 1%; the copper powder is oxygen-free copper pink;
[0035] Step 3: Deoxidize and sinter the specific oxidized alloy powder obtained in the second step to obtain a dispersed aluminum-copper blank; the process of deoxidizing and hot-pressing sintering is as follows: firstly open the upper indenter 7 and put the specific oxidized alloy powd...
Embodiment 2
[0039] This embodiment includes the following steps:
[0040] Step 1. Perform sufficient external oxidation treatment on the aluminum-copper alloy powder to obtain external alumina-copper alloy powder; the aluminum-copper alloy powder is a powder formed by aluminum coating on the surface of copper particles, and the process of the sufficient external oxidation treatment is: In an oxygen atmosphere, heated to 300 ℃ and then kept for 30h;
[0041] Step 2: Mix the outer alumina-copper alloy powder obtained in step 1 with copper powder to obtain a specific oxide alloy powder; the mass percentage of aluminum in the specific oxide alloy powder is 0.5%; the copper powder is oxygen-free copper pink;
[0042] Step 3: Deoxidize and sinter the specific oxidized alloy powder obtained in the second step to obtain a dispersed aluminum-copper blank; the process of deoxidizing and hot-pressing sintering is as follows: firstly open the upper indenter 7 and put the specific oxidized alloy powd...
Embodiment 3
[0046] This embodiment includes the following steps:
[0047] Step 1. Perform sufficient external oxidation treatment on the aluminum-copper alloy powder to obtain external alumina-copper alloy powder; the aluminum-copper alloy powder is a powder formed by aluminum coating on the surface of copper particles, and the process of the sufficient external oxidation treatment is: Under the atmospheric atmosphere, heat to 700 ℃ and then keep for 5h;
[0048] Step 2: Mix the outer alumina-copper alloy powder obtained in step 1 with copper powder to obtain a specific oxide alloy powder; the mass percentage of aluminum in the specific oxide alloy powder is 0.1%; the copper powder is oxygen-free copper pink;
[0049] Step 3: Deoxidize and sinter the specific oxidized alloy powder obtained in the second step to obtain a dispersed aluminum-copper blank; the process of deoxidizing and hot-pressing sintering is as follows: firstly open the upper indenter 7 and put the specific oxidized allo...
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Abstract
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