Preparation method of dispersed strengthened platinum rhodium and platinum composite material
A technology of dispersion strengthening and composite materials, which is applied in the field of metal materials to achieve the effect of high toughness, prevention of expansion and loss of design.
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Embodiment 1
[0024] 1 Preparation of dispersion strengthened platinum rhodium:
[0025] 1-1 Ingredients: take dispersant 0.01%~0.6%, take rhodium powder 0.01%~30%, and the rest is platinum ingot;
[0026] 1-2 Vacuum smelting: put the dispersion enhancer prepared in step 1-1, rhodium powder and platinum ingot in a vacuum induction furnace for smelting, the vacuum degree is less than 20Pa, the temperature is 1900-2200°C, and the smelting time is 1-200℃ 2 hours, obtain liquid alloy;
[0027] 1-3 Casting and rolling: the liquid alloy obtained in step 1-2 is cast into an ingot in a mold at a casting temperature of 1950-2250°C, and the ingot is rolled on a rolling mill to have a thickness of 0.1-0.3mm and a width of 20 ~ 150mm alloy sheet;
[0028] 1-4 Oxidation treatment: after cutting the alloy sheet obtained in step 1-3 into an alloy sheet with a length of 20-150mm, and then oxidizing it at 1000-1300°C for 80-120 hours to obtain a dispersion-strengthened platinum-rhodium sheet;
[0029] 2 ...
Embodiment 2
[0040] Stack 100 dispersion-strengthened platinum-rhodium sheets and 1500 ordinary platinum sheets according to a certain mass distribution ratio, and the stacking order is: ordinary platinum sheets, dispersion-strengthened platinum-rhodium sheets, and ordinary platinum sheets. The mass ratios are successively: 46.875%, 6.25%, 46.875%, and the technological process is the same as that described in Example 1.
[0041] The obtained finished product is sampled, and the sampling specification is as follows: length 100mm, width 10mm, thickness 1mm. And do the tensile test at the temperature of 1400℃. Under the same stress, the high-temperature elongation of dispersion-strengthened platinum-rhodium and platinum composite materials is 18.7 times that of ordinary dispersion-strengthened platinum-rhodium, and the high-temperature life is 1.5 times that of ordinary platinum-rhodium.
Embodiment 3
[0043] Stack 500 dispersion-strengthened platinum-rhodium sheets and 1500 ordinary platinum sheets according to a certain mass distribution ratio. Platinum sheet. The mass ratios are successively: 25%, 12.5%, 25%, 12.5%, 25%, and the technological process is the same as that described in Example 1.
[0044] The obtained finished product is sampled, and the sampling specification is as follows: length 100mm, width 10mm, thickness 1mm. And do the tensile test at the temperature of 1400℃. Under the same stress, the high-temperature elongation of dispersion-strengthened platinum-rhodium and platinum composite materials is 17.6 times that of ordinary dispersion-strengthened platinum-rhodium, and the high-temperature life is 2.7 times that of ordinary platinum-rhodium.
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