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A rare earth oxide and particle strengthening technology is applied in the field of rare earth oxide particle strengthening high-conductivity copper alloy materials, which can solve the problem of high price
Active Publication Date: 2017-06-13
JIANGXI UNIV OF SCI & TECH
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Problems solved by technology
The current electrical contacts mainly use Ag, FAg, AgNi, AgSnO2, AgCdO, etc., and the price is relatively high
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Embodiment 1
[0028] 1) Put copper oxide and yttrium oxide powder, process control agent (PCA) stearic acid, and zirconia balls into a ball mill and mix them. The volume ratio of yttrium oxide powder to copper powder is 1:49, and wash with ethanol. Put it into a vacuum oven and dry at 80°C for 30 minutes.
[0029] 2) Put the above powder, process control agent, and zirconia balls into a ball mill jar, and pour into argon protective atmosphere.
[0030] 3) Put the ball mill jar into the ball mill for ball milling, the ball milling speed is 300r / min, and the ball milling time is 24h.
[0031] 4) Put the ball-milled powder into the corundum tray, then slowly put the corundum tray into the tube furnace, introduce a reducing atmosphere and heat it for heat preservation. The heat preservation temperature is 500°C and the heat preservation time is 4 hours.
[0032] 5) Put the graphite mold containing the reduced powder into the discharge plasma sintering furnace for sintering, the sintering ambie...
Embodiment 2
[0035] The preparation method is basically the same as in Example 1, except that the volume ratio of yttrium oxide powder to copper powder is 1:19; copper oxide, yttrium oxide powder, process control agent (PCA) stearic acid, and zirconia balls are cleaned separately mix.
[0036] After cooling, a high-strength and high-conductivity copper alloy strengthened by yttrium oxide particles was obtained. The yield strength was determined to be 253.6MPa, and the conductivity at room temperature was 87.2%IACS.
Embodiment 3
[0038] The preparation method is the same as in Example 1, except that the volume ratio of yttrium oxide powder to copper powder is 4:46.
[0039] After cooling, a high-strength and high-conductivity copper alloy strengthened by yttrium oxide particles was obtained. The measured yield strength was 269.8MPa, and the conductivity at room temperature was 82.5%IACS.
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Abstract
The invention discloses a preparation method for a rare earth oxide particle reinforced high-conductivity copper alloy. The preparation method comprises the following steps: after copper oxide, rare earth oxide powder, stearic acid serving as a PCA (Process Control Agent) and zirconia grinding media are dried, placing the dried copper oxide, the rare earth oxide powder, the stearic acid serving as the PCA and the zirconia grinding media into a ball grinding tank for performing ball grinding; placing powder which is subjected to the ball grinding into a tube furnace, introducing reducing atmosphere, heating and performing heat preservation, wherein the heat preservation temperature is 500 +/- 10 DEG C, and the heat preservation time is 4+/-0.5 h; sintering a graphite mould which is filled with the reduced powder in a discharge plasma sintering furnace, and cooling to obtain the rare earth oxide particle reinforced high-conductivity copper alloy. Through testing of comprehensive performance, the maximum yield strength is 269.8 MPa, and the electrical conductivity at normal temperature is 82.5 percent IACS (International Annealed Copper Standard).
Description
technical field [0001] The invention relates to the field of high-strength and high-conductivity copper alloy materials, in particular to a rare earth oxide particle-reinforced high-conductivity copper alloy material and a preparation method of the material. Background technique [0002] As the core component of medium and high voltage switchgear, electrical contacts play the role of breaking and conducting, and are widely used in various high-voltage load switches, SF6 circuit breakers, on-load tap-changers, large breaking capacity isolating switches and grounding switch. The current electrical contacts mainly use Ag, FAg, AgNi, AgSnO2, AgCdO, etc., and the price is relatively high. Contents of the invention [0003] The method for preparing rare earth oxide particles to strengthen high-strength and high-conductivity copper alloys provided by the present invention, through improving the adding process of rare earth oxide particles in copper alloys, and cooperating with a...
Claims
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Application Information
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