Electron back-scattering diffraction (EBSD) sample preparation method for cemented carbide powder

A cemented carbide and powder technology, which is applied in the field of cemented carbide powder EBSD sample preparation, achieves the effects of high test repeatability, easy realization, and saving sintering cost and test time.

Inactive Publication Date: 2017-10-03
ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Most of the existing patent reports and literature on EBSD sample preparation and test analysis are materials in the field of iron and steel alloys, and the sample preparation methods are mainly electrolytic polishing, mechanical polishing, particle beam polishing, etc. There are relatively few reports, and EBSD sample preparation involving cemented carbide WC raw materials and mixture powders has not been reported so far

Method used

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  • Electron back-scattering diffraction (EBSD) sample preparation method for cemented carbide powder
  • Electron back-scattering diffraction (EBSD) sample preparation method for cemented carbide powder
  • Electron back-scattering diffraction (EBSD) sample preparation method for cemented carbide powder

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Embodiment

[0061] In the present embodiment, cemented carbide powder takes 5 μm WC raw material powder as an example, selects 5 μm WC raw material powder sample, prepares EBSD sample and tests, the result is as follows figure 1 and figure 2 As shown, the specific steps are:

[0062] Ingredients: Use an electronic balance to weigh 10g each of 5μm WC raw material powder and 200-mesh analytical electrolytic Cu powder (Kermel reagent) at a weight percentage of 1:1, and grind and mix them in a mortar for 30 minutes.

[0063] Compression molding: Struer Citopress-1 mosaic instrument is used to compress the well-proportioned WC / Cu mixed powder, the compression pressure is about 20KN, and the diameter of the compact is 25mm.

[0064] Sintering: Cut a block with a size of about 3mm from the pressed compact and put it into a thermal analyzer DSC Al 2 o 3 Crucible, and then placed on the STA449F3 thermal analyzer support, close the cavity. First vacuumize the cavity, then use Ar protection, in...

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Abstract

The invention discloses an EBSD sample preparation method for cemented carbide powder. The EBSD sample preparation method comprises the following steps: mixing and batching of powdery samples; compression molding; sintering; inlaying; grinding and polishing; and sample cleaning. According to the invention, raw cemented carbide powder and Cu powder are fully and uniformly mixed, and the obtained mixture is sintered in a thermal analyzer with precise temperature control and a protective atmosphere; the raw cemented carbide powder is cured in virtue of a Cu phase, and the aggregates of a WC raw material are perfectly dispersed; the optimal parameters of EBSD grinding, polishing and sample preparation are obtained through optimization, so good EBSD testing results can be obtained; and application of large equipment is omitted, so pressing and sintering cost is greatly reduced and an experimental period is shortened.

Description

technical field [0001] The invention relates to an electron backscatter diffraction (EBSD) sample preparation method of an alloy powder, in particular to a cemented carbide powder EBSD sample preparation method. Background technique [0002] Electron Backscatter Diffraction (EBSD) has become a new test method for the analysis of the microstructure of crystalline materials, and has been widely used in various crystalline materials, such as metals, ceramics, geology and minerals. The EBSD technology method can simultaneously display the microscopic morphology, structure and orientation distribution information of the material, and obtain accurate results such as grain size, grain orientation, interface characteristics, and texture. At present, most of the EBSD research work mainly involves bulk materials and thin film materials, but there is no report on the EBSD research and analysis of powder (1-100 μm) materials, which is mainly due to the difficulty in preparing EBSD sampl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/20G01N23/203G01N1/28G01N1/32G01N1/44G01N1/38
CPCG01N1/28G01N1/286G01N1/32G01N1/38G01N1/44G01N23/2005G01N23/203G01N2223/053G01N2223/312
Inventor 李园园高跃红林江华温光华陈响明
Owner ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD
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