Method for preparing GH4169 high-temperature alloy TEM (transmission electron microscopy) sample

A GH4169, transmission electron microscope sample technology, applied in the direction of material analysis, measurement device, instrument, etc. using wave/particle radiation, can solve problems such as low efficiency and insufficient quality, and achieve easy control, strong quality controllability, and improved quality. The effect of sample preparation efficiency

Inactive Publication Date: 2019-03-01
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] What the present invention aims to solve is the technical problem that the existing method for preparing GH4169 superalloy TEM samples is inefficient and the quality is not good enough

Method used

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  • Method for preparing GH4169 high-temperature alloy TEM (transmission electron microscopy) sample
  • Method for preparing GH4169 high-temperature alloy TEM (transmission electron microscopy) sample
  • Method for preparing GH4169 high-temperature alloy TEM (transmission electron microscopy) sample

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Embodiment 1

[0036] Wire cutting processes the sample into thin slices with a thickness of 0.5mm. Using Buehler EcoMet250 automatic grinding and polishing equipment, the slices are passed through 400#, 600#, 800#, 1200#, 1600# at a pressure of 200N and a speed of 300 rpm. The metallographic sandpaper is mechanically thinned to 70μm, and then the sample is punched into a circular sheet with a diameter of 3mm using a punching instrument. Use StruersTenuPol-5 electrolytic double spray equipment for electrochemical thinning, the electrolyte used is a mixed solution of 10% perchloric acid + 90% absolute ethanol, the electrolytic voltage of the thinning process is 35V, and the electrolyte temperature is controlled by liquid nitrogen At -10°C, the electrochemical thinning until the system automatically stops. After the sample is prepared, take it out immediately and place it in a number of alcohol vessels for full washing. The resulting thin area tissue is like image 3 As shown, the light-transm...

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Abstract

The invention belongs to the technical field of alloy material detection and analysis, and particularly relates to a method for preparing a GH4169 high-temperature alloy TEM (transmission electron microscopy) sample. The method aims at solving the technical problems that the existing method for preparing the GH4169 high-temperature alloy TEM sample is low in efficiency, and that the quality is poor. The method aims to provide the economical, efficient, convenient and fast method for preparing the GH4169 high-temperature alloy TEM sample. The method for preparing the GH4169 high-temperature alloy TEM sample is characterized by comprising the following steps that after the thickness of a GH4169 high-temperature alloy sample is reduced to 70 to 80 mu m, an electrolysis double-spray method isused for thinning; used electrolyte is a mixed solution of 10-percent perchloric acid and 90-percent absolute ethyl alcohol. The TEM sample prepared by the method has high surface quality and large thin regions; the method is very applicable to the large-batch preparation of high-quality GH4169 high-temperature alloy TEM samples.

Description

Technical field [0001] The invention belongs to the technical field of alloy material detection and analysis, and specifically relates to a method for preparing a GH4169 high-temperature alloy transmission electron microscope sample. Background technique [0002] GH4169 superalloy is a kind of Ni-Cr-Fe-based heat-resistant metal material. It can serve for a long time under a relatively high temperature range and certain stress conditions. It has excellent high temperature strength, good fracture toughness, fatigue performance and thermal corrosion resistance. , Has become an irreplaceable key material for the hot-end components of military and civilian gas turbine engines, and has been hailed as "the cornerstone of advanced engines." [0003] The microstructure is the decisive factor for material properties. In recent years, Transmission Electron Microscopy (TEM), as a powerful means of characterizing the microstructure of materials, has been widely used in related research fields...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/2202
CPCG01N23/2202
Inventor 李佳莲唐静谢霖
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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