Observing method of metallographic structure of equiatomic platinum-cobalt alloy

A technology of equal atomic ratio and metallographic structure, which is applied in the direction of measuring devices, preparation of test samples, material analysis through optical means, etc. Uniform and easy to control, optimize the effect of processing parameters

Inactive Publication Date: 2018-02-23
西安诺博尔稀贵金属材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electrolytic corrosion of platinum-cobalt alloys using the above formula and method is complicated and the etching effect is not obvious.

Method used

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  • Observing method of metallographic structure of equiatomic platinum-cobalt alloy
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  • Observing method of metallographic structure of equiatomic platinum-cobalt alloy

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Embodiment 1

[0032] The observation method of the PtCo alloy metallographic structure of the present embodiment equiatomic ratio comprises the following steps:

[0033] Step 1. Cutting and inlaying of the PtCo alloy sample 4 of equal atomic ratio: Cut the PtCo alloy sample 4 of equal atomic ratio on the PtCo alloy plate of equal atomic ratio. Since the material is hard and brittle and the specification is a square bar, electric The wire spark cutting method is used to cut the sample. The molybdenum wire ≤φ0.12 is used for cutting. The cutting voltage is 70V, the current is 0.4A, and the pulse width is 0. The size of the sample taken is: length×width×height=9mm×8mm× 6mm, the weight of the PtCo alloy sample 4 of the equiatomic ratio taken by weighing is 5.76g, then the PtCo alloy sample 4 of the equiatomic ratio is placed in the mold, and the PtCo alloy sample of the equiatomic ratio is added to the PtCo alloy sample of the equiatomic ratio. Sample 4 is completely covered, and the thickness ...

Embodiment 2

[0040] The observation method of the PtCo alloy metallographic structure of the present embodiment equiatomic ratio comprises the following steps:

[0041] Step 1. Cutting and inlaying of the PtCo alloy sample 4 of equal atomic ratio: Cut the PtCo alloy sample 4 of equal atomic ratio on the PtCo alloy plate of equal atomic ratio. Since the material is hard and brittle and the specification is a square bar, electric The wire spark cutting method is used to cut the sample. The molybdenum wire ≤φ0.12 is used for cutting. The cutting voltage is 70V, the current is 0.4A, and the pulse width is 0. The size of the sample taken is: length×width×height=9.2mm×8.6 mm × 5.3mm, the weight of the PtCo alloy sample 4 of equiatomic ratio taken by weighing is 6.23g, then the PtCo alloy sample 4 of equiatomic ratio is placed in the mould, and toothbrush powder is added to make the equiatomic ratio The PtCo alloy sample 4 is completely covered, and the thickness of the covered denture base powde...

Embodiment 3

[0048] The observation method of the PtCo alloy metallographic structure of the present embodiment equiatomic ratio comprises the following steps:

[0049] Step 1. Cutting and inlaying of the PtCo alloy sample 4 of equal atomic ratio: Cut the PtCo alloy sample 4 of equal atomic ratio on the PtCo alloy plate of equal atomic ratio. Since the material is hard and brittle and the specification is a square bar, electric The wire spark cutting method is used to cut the sample. The molybdenum wire ≤φ0.12 is used for cutting. The cutting voltage is 70V, the current is 0.4A, and the pulse width is 0. The size of the sample taken is: length×width×height=8.9mm×7.8 mm × 6.2mm, the weight of the PtCo alloy sample 4 of equiatomic ratio taken by weighing is 5.49g, then the PtCo alloy sample 4 of equiatomic ratio is placed in the mould, and toothbrush powder is added to make the equiatomic ratio The PtCo alloy sample 4 is completely covered, and the thickness of the covered denture powder is ...

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Abstract

The invention discloses an observing method of a metallographic structure of an equiatomic platinum-cobalt alloy. The observing method comprises the steps that 1, an equiatomic PtCo alloy sample is cut on a workpiece and fixed on denture base resin; 2, the alloy sample is ground by a grinding machine and then is ground level by level by sequentially adopting number 600 metallographic abrasive paper and number 1200 metallographic abrasive paper; the polished platinum-cobalt alloy sample is subjected to mechanical polishing, and the platinum-cobalt alloy sample without remarkable scratch and contamination point is obtained; 4, the platinum-cobalt alloy obtained after mechanical polishing is placed in a corrosive container filled with a corrosive solution for etching, after etching is completed, the platinum-cobalt alloy is placed under a metallographic microscope, and thus the metallographic structure of the equiatomic platinum-cobalt alloy is observed. The sample preparing method has low requirements for levels of experimental devices and operating personnel, is suitable for preparation of the equiatomic platinum-cobalt alloy in a normal laboratory, is quite low in alloy consumption, and greatly lowers the risk of loss and waste of precious metal.

Description

technical field [0001] The invention belongs to the technical field of metallographic preparation, and in particular relates to a method for observing the metallographic structure of an equiatomic ratio PtCo alloy. Background technique [0002] Platinum-cobalt alloy is a binary alloy based on platinum. It is a high-performance permanent magnet material. Among the known machinable permanent magnet alloys, PtCo alloy has the highest coercive force. Among them, the medium atomic ratio PtCo alloy is a widely used high energy product permanent magnet material. At high temperature, platinum and cobalt can dissolve infinitely, and its solid solution is a face-centered cubic lattice. When it is slowly cooled to 833°C, an orderly transformation of a hard magnetic phase with a face-centered tetragonal structure begins to appear in the alloy. The coercive force on the polycrystalline sample can reach 430KA / m, and that on the sample cut from the single crystal along the [111] direction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/32G01N21/84
Inventor 赵涛余建军孟志军贾志强毛明韩吉庆陈昊宜楠马晓东李宇
Owner 西安诺博尔稀贵金属材料股份有限公司
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