Preparation method for specimen capable of being directly used for X-ray diffraction (XRD) detecting phase compositions
A direct, block-like technology, applied in the preparation of test samples, etc., can solve the problems of phase composition transformation and the accuracy of test results cannot be guaranteed, and achieve the effect of simple operation and accurate measurement data.
Active Publication Date: 2014-11-19
XIAMEN TUNGSTEN
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Problems solved by technology
Due to external forces such as flat grinding and polishing and repeated changes in temperature when lubricated and cooled, there is an instantaneous temperature difference between the surface and the interior of the sample block. This treatment will cause the sample block to be subject to greater stress, induce phase composition changes, and ensure the accuracy of the test results. not guaranteed
Method used
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Embodiment
[0019] see Figure 1 to Figure 3 Shown, a kind of preparation method of the sample that can be directly used in XRD detection phase composition of the present invention comprises the steps:
[0020] Step (1) Take a certain amount of mixed material RTP powder according to the preset formula, and perform pressing and sintering according to the predetermined process parameters to obtain the required sample block 1; the sample block 1 is a block body, and the sample block 1 One of the sides 11 has a V-shaped groove 2, and the two ends of the V-shaped groove 2 penetrate through the two opposite surfaces 12 of the sample block, namely figure 1 The upper and lower faces of ;
[0021] When making the sample block, the pressing and sintering process used is the process used in conventional technology, and the required sample block 1 can be made by selecting appropriate process parameters;
[0022] Step (2) Fix the sample block 1 on the prefabricated fixture (not shown in the figure),...
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The invention discloses a preparation method for a specimen capable of being directly used for X-ray diffraction (XRD) detecting phase compositions. A V-shaped groove block is adopted for fabrication. A computerized numerical control wire-cut electric discharge machine is used for cutting. A stretch test machine is used for pulling off. Pressing process and sintering process are used for producing a sample piece, the computerized numerical control wire-cut electric discharge machine is used for producing cutting gaps, the sample piece is pulled off in a pulling-off mode and is enabled to be pulled to two pieces along a V-shaped groove and the cutting gaps, and therefore a pulling-off face is obtained. With the combination of the three technologies, the sample piece free from effect of stress and changes of phase compositions is obtained and can be directly used for XRD scanning. The preparation method for the specimen capable of being directly used for XRD detecting the phase compositions has the advantages of being precise in measuring data, simple in operation and convenient.
Description
technical field [0001] The invention relates to the technical field of hard alloy material manufacture, in particular to a preparation method of a sample that can be directly used for XRD detection of phase composition. Background technique [0002] XRD (X-ray diffraction), that is, X-ray diffraction, is a research method that obtains information such as the composition of materials, the structure or morphology of atoms or molecules inside materials, and other information by performing X-ray diffraction on materials and analyzing their diffraction patterns. In the field of powder metallurgy, it is usually used to detect the phase composition of materials. [0003] In powder metallurgy, mixed material RTP powder refers to the particles formed by the mixture of WC, Co, a small amount of forming agent and some other necessary additives through ball milling, dry granulation and other processes, which can be directly pressed into cemented carbide products. [0004] In the proces...
Claims
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IPC IPC(8): G01N1/28
Inventor 谢海唯吴冲浒谢颖项忠楠郑爱钦肖满斗聂洪波冯炎建
Owner XIAMEN TUNGSTEN