System for testing damage to gradient composite under thermal/electric/magnetic/coupling action
A gradient material and testing system technology, applied in the direction of analyzing materials, measuring devices, strength characteristics, etc., can solve the problems that the testing of gradient material mechanics and electromagnetic performance indicators cannot be carried out
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[0018] Implementation mode: The electromagnetic principle diagram of the test system of the present invention is as follows figure 1 Shown. A gradient layer with a thickness of 121 μm was prepared on the metal substrate by the self-propagating combustion synthesis method and cut into a gradient material sample with a width of 20 μm and a length of 69 μm. Such as figure 2 As shown, the sensor probe is fixed on the fixture, the displacement of the fixture is controlled so that the sensor probe contacts the gradient material, and then the current density applied to the gradient material is 82mA / cm 2 . Actually build as figure 2 As shown, due to the alternating thermal stress generated by the direct current in the gradient material, the gradient material passes through 7.58×10 5 Seconds later, holes, microcracks and damage were generated, and further direct current was applied until failure and destruction occurred.
[0019] During the whole test process, the CCD probe of the sca...
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