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Preparation method of transmission electron microscope film sample through rapidly solidifying aluminum alloy powder

A technology for transmission electron microscopy and sample preparation, applied in the preparation of test samples, electrolytic coatings, coatings, etc., can solve the problems of poor bonding between Al-Fe-X alloy powder and nickel matrix, high cost, and complicated procedures, and achieve Reduce the preparation cost, solve the effect of poor bonding and high strength

Inactive Publication Date: 2012-01-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention aims to solve the problems of high cost, complicated process and poor combination of Al-Fe-X alloy powder and nickel matrix in the transmission electron microscope thin film sample prepared by the prior art, and provides a kind of transmission electron microscope thin film sample preparation of rapidly solidified aluminum alloy powder method

Method used

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  • Preparation method of transmission electron microscope film sample through rapidly solidifying aluminum alloy powder
  • Preparation method of transmission electron microscope film sample through rapidly solidifying aluminum alloy powder
  • Preparation method of transmission electron microscope film sample through rapidly solidifying aluminum alloy powder

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specific Embodiment approach 1

[0013] Specific implementation mode 1: This implementation mode is a method for preparing a transmission electron microscope thin film sample of a rapidly solidified aluminum alloy powder, which is specifically completed according to the following steps:

[0014] 1. Configure the electroplating solution: the electroplating solution is made of NiSO 4 、H 3 BO 3 、Na 2 SO 4 , NaCl, MgSO 4 and H 2 Prepared from O, NiSO in the plating solution 4 The mass-volume concentration is 160-240g / L, H 3 BO 3 The mass-volume concentration is 28~35g / L, Na 2 SO 4 The mass-volume concentration of NaCl is 22-26g / L, the mass-volume concentration of NaCl is 14-18g / L, MgSO 4 The mass-volume concentration is 26 ~ 35g / L; 2. Connecting device: put the electroplating solution prepared in step 1 in a glass container, then put it into an acid and alkali resistant magnetic stirrer rotor, and place it on a magnetic heating stirrer , and finally immerse the electroplating plate connected to the DC ...

specific Embodiment approach 2

[0027] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the Al-Fe-X alloy powder described in step 3 is prepared by gas atomization method with a particle size of 1-40 μm alloy powder. - The atomic percentage of Al in the Fe-X alloy powder is 90-96%, the atomic percentage of Fe is 1-5%, and the atomic percentage of X is 1-7%, wherein the X is a transition One of group elements and rare earth elements or a combination of the two at an atomic percentage of 1:1. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0028] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the mechanical pre-thinning described in step three is performed as follows: the cathode obtains the copper on the rough product of the transmission electron microscope film of the rapidly solidified aluminum alloy powder The foil is completely removed, and then both sides are evenly polished until the thickness is 50±5μm. Finally, the crude transmission electron microscope film with a thickness of 50±5μm is immersed in a NaOH aqueous solution with a mass fraction of 10%, and the Al -Punching the area where the Fe-X alloy powder is concentrated, the diameter of the hole is 3mm, that is, the mechanical pre-thinning is completed, and the transmission electron microscope film sample of the fast solidified aluminum alloy powder after mechanical pre-thinning is obtained. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a preparation method of a transmission electron microscope film sample containing icosahedron quasi-crystal through rapidly solidifying aluminum alloy powder, and relates to the field of preparation of a transmission electron microscope film sample. The invention aims to solve the problems that the transmission electron microscope film sample containing the icosahedrons quasi-crystal is not prepared in the prior art. The preparation method comprises the following specific operation steps: 1) preparing an electroplating solution; 2) connecting devices; and 3) electroplating. The transmission electron microscope film sample through rapidly solidifying aluminum alloy powder prepared by the invention contains the icosahedrons quasi-crystal. The inventive method is mainly used for preparing the transmission electron microscope film sample containing the icosahedrons quasi-crystal through the rapidly solidifying aluminum alloy powder.

Description

technical field [0001] The invention relates to the field of preparation of thin film samples for transmission electron microscopy. Background technique [0002] With the rapid development of cutting-edge technologies such as aerospace and aviation and the maturation of powder metallurgy in the field of material science, the preparation of heat-resistant aluminum alloys by rapid solidification-powder metallurgy has become a research hotspot. Rapid solidification generally means that the liquid phase is greater than 10 5 ~10 6 The process of solidifying into a solid phase at a cooling rate of K / s, which is a non-equilibrium solidification process, generates metastable phases (amorphous, quasicrystalline, microcrystalline and nanocrystalline), making powders and materials have special properties . The development of rapid solidification technology provides the necessary conditions for the development of Al-TM (transition metal) based heat-resistant aluminum alloys. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D15/00G01N1/28
Inventor 沈军冯艾寒吴静
Owner HARBIN INST OF TECH
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