Device and method for nondestructive testing of uniformity of barium-tungsten cathode matrix
A barium tungsten cathode, non-destructive testing technology, applied in measurement devices, suspension and porous material analysis, instruments, etc., can solve the problems of inability to achieve non-destructive testing, inability to characterize location distribution, etc., to achieve small bubble escape time difference, bubbles Uniform effect of distributed dispersed matrix
Pending Publication Date: 2021-11-09
NANJING SANLE GROUP
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The mercury intrusion method relies on external pressure to make mercury enter the pores of the cathode matrix against surface tension, thereby measuring the pore size and pore size distribution range. detection
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[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0026] see Figure 1-Figure 4 , the present invention provides a device for non-destructive testing of the uniformity of a barium-tungsten cathode substrate, including a base 1, and the inside of the base 1 is sequentially installed with an upper pressing plate 4, a vacuum rubber 3 and a lower pressing plate 2, and the center of the vacuum rubber 3 is The barium tungsten cathode base 5 is embedded, the upper end of the upper platen 4 is detachably connected wi...
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The present invention discloses a device and a method for nondestructive testing of uniformity of a barium-tungsten cathode matrix. The device comprises a base, an upper pressing plate, a vacuum rubber and a lower pressing plate are sequentially installed in the base from top to bottom, the barium-tungsten cathode substrate is embedded in the center of the vacuum rubber, the upper end of the upper pressing plate is detachably connected with an upper cover, absolute ethyl alcohol is injected into the center of the upper pressing plate, the base is connected with steel cylinder nitrogen through a deflation valve, the defects of a traditional tungsten matrix detection method are overcome, the position distribution situation of holes is represented through escaped bubbles, and therefore nondestructive testing of the uniformity of the barium-tungsten cathode matrix is achieved, and the nondestructive testing is complementary with a mercury injection method.
Description
technical field [0001] The invention belongs to the technical field of non-destructive detection of uniformity of tungsten substrate, and in particular relates to a device and method for non-destructive detection of uniformity of barium-tungsten cathode substrate. Background technique [0002] The electrical performance, long life, and high reliability of the cathode depend on its emission capability, evaporation characteristics and anti-poisoning, and the source of the emission capability, evaporation characteristics and anti-poisoning of the cathode is a large amount of active barium distributed on the surface of the cathode and the diffusion rate of the active barium . Realizing the dynamic balance of active material storage, evaporation, diffusion, and transportation is the key to obtain long-life and highly reliable cathodes. The tungsten matrix is the skeleton of the barium tungsten cathode, which is used to store active substances and act as a diffusion channel. Si...
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Login to View More IPC IPC(8): G01N15/08
CPCG01N15/088G01N2015/0846
Inventor 张毅胡文景范亚松
Owner NANJING SANLE GROUP