A test method for the crush strength of coated fuel particles
A technology for coating fuel particles and testing methods, which is applied in the directions of strength characteristics, testing material strength using stable tension/pressure, and preparation of samples for testing, etc. It is simple and fast, and the effect of avoiding inherent errors and defects
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Embodiment 1
[0030] In this example, SiC spherical shells and cores are coated fuel particles of zirconia, and the structure of the coated fuel particles before treatment is as follows: figure 1 As shown, from inside to outside, it includes: fuel core 1, buffer layer 2, inner dense pyrolytic carbon layer 3, SiC spherical shell layer 4 and outer dense pyrolytic carbon layer 5, and its X-ray imaging is as follows figure 2 shown. The specific process steps are as follows:
[0031] 1) The first high temperature oxidation treatment (see figure 1 Step S in 1 ): Put a certain amount of coated fuel particles in an alumina crucible and place them in a high-temperature oxidation furnace, raise the temperature to 850°C in an air atmosphere, keep the temperature for 10 hours, and then cool down and sample. In this step, the outer dense pyrolysis The carbon layer 5 first decomposes into CO and CO in a high-temperature oxidizing atmosphere 2 disappear, at this time the X-ray imaging of the structur...
Embodiment 2
[0038] In this example, ZrC spherical shells are used, and the core is coated fuel particles of uranium oxide. The specific process steps are as follows:
[0039] 1) The first high-temperature oxidation treatment: put a certain amount of coated fuel particles in an alumina crucible and place it in a high-temperature oxidation furnace, raise the temperature to 600°C in an air atmosphere, keep it for 8 hours, and then cool down and take samples.
[0040] 2) Preparation of laser-drilled samples: the coated fuel particles after high-temperature oxidation treatment were ultrasonically cleaned with acetone, deionized water and ethanol, and then dried in a drying oven.
[0041] 3) Preparation of laser-drilled template: On the copper plate, a laser is used to prepare 20*20 arrays of pits with a diameter of about 1mm.
[0042] 4) Laser drilling: Sprinkle the coated fuel particles after the first high-temperature oxidation treatment into the small holes of the laser drilling template, ...
Embodiment 3
[0046] In this example, a ZrC spherical shell and a core of thorium oxide coated fuel particles are used. The specific process steps are as follows:
[0047] 1) The first high-temperature oxidation treatment: put a certain amount of coated fuel particles in an alumina crucible, and place it in a high-temperature oxidation furnace, raise the temperature to 600°C in an air atmosphere, keep it for 12 hours, and then cool down and take samples.
[0048] 2) Preparation of laser-drilled samples: the coated fuel particles after high-temperature oxidation treatment were ultrasonically cleaned with acetone, deionized water and ethanol, and then dried in a drying oven.
[0049] 3) Preparation of laser-drilled template: On the copper plate, a laser is used to prepare 20*20 arrays of pits with a diameter of about 1 mm.
[0050] 4) Laser drilling: Sprinkle the coated fuel particles after the first high-temperature oxidation treatment into the small holes of the laser drilling template, ad...
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