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Tungsten-nickel-iron alloy polishing liquid and alloy surface polishing and metallographic preparation method

A technology of tungsten-nickel-iron alloy and polishing liquid, which is applied in the fields of polishing processing and material surface structure determination, can solve the problems of poor surface quality, corrosion, complex metallographic preparation process, etc., and achieves a small height difference between phases and a clear and complete metallographic structure. , The effect of metallographic surface structure is clear

Active Publication Date: 2020-12-11
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the poor surface quality of the polished tungsten-nickel-iron alloy in the prior art, the complex metallographic preparation process, and the need to use strong acid, strong alkali, strong oxidizing and other toxic and harmful substances to corrode the surface of the sample, a new method is proposed. Tungsten Nickel Iron Alloy Chemical Mechanical Polishing Fluid

Method used

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  • Tungsten-nickel-iron alloy polishing liquid and alloy surface polishing and metallographic preparation method
  • Tungsten-nickel-iron alloy polishing liquid and alloy surface polishing and metallographic preparation method
  • Tungsten-nickel-iron alloy polishing liquid and alloy surface polishing and metallographic preparation method

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Embodiment 1

[0034] A tungsten-nickel-iron alloy chemical mechanical polishing liquid, comprising nano abrasive particles, oxidizing agent, viscosity regulator, pH regulator and deionized water; the content of the nano abrasive particles is 30% of the polishing liquid; the content of the oxidizing agent is polishing 0.01 of the liquid; the viscosity regulator is adjusted according to the actual situation, and the final kinematic viscosity of the polishing liquid reaches 15-20mm 2 / s range; the pH value of the tungsten-nickel-iron alloy chemical mechanical polishing solution is pH 2.5-pH 3.5.

[0035] The nano abrasive particles include colloidal silicon dioxide, and the average abrasive particle diameter is 20-100nm. The oxidizing agent includes citric acid; the viscosity modifier includes glycerin. The pH regulator includes citric acid.

Embodiment 2

[0037] A tungsten-nickel-iron alloy chemical mechanical polishing liquid, comprising nano abrasive particles, oxidizing agent, viscosity regulator, pH regulator and deionized water; the content of the nano abrasive particles is 5.0wt.% of the polishing liquid; the content of the oxidizing agent It is 2.0wt.% of the polishing liquid; the viscosity regulator is adjusted according to the actual situation, and the final viscosity value of the polishing liquid reaches 40-45mm 2 / s range; the pH value of the tungsten-nickel-iron alloy chemical mechanical polishing solution is pH 6.5-pH 7.5, and the specific pH value is determined according to specific procedures.

[0038] The nano-abrasive particles include colloidal aluminum oxide, and the average abrasive particle size is 20-100nm. The oxidizing agent includes oxalic acid; the viscosity regulator includes polyethylene glycol. The pH regulator includes sodium dihydrogen phosphate.

Embodiment 3

[0040] A tungsten-nickel-iron alloy chemical mechanical polishing liquid, comprising nano abrasive particles, oxidizing agent, viscosity regulator, pH regulator and deionized water; the content of the nano abrasive particles is 15wt.% of the polishing liquid; the content of the oxidizing agent is 1.0wt.% of the polishing liquid; the viscosity regulator is adjusted according to the actual situation, and the final viscosity value of the polishing liquid reaches 30-35mm 2 / s range; the pH value of the tungsten-nickel-iron alloy chemical mechanical polishing solution is pH 9.5-pH 10.5, and the specific pH value is determined according to specific procedures.

[0041] The nano-abrasive particles include colloidal aluminum oxide, and the average abrasive particle size is 20-100nm. The oxidizing agent includes oxalic acid; the viscosity regulator includes polyethylene glycol. Described pH adjusting agent comprises citric acid, sodium hydroxide.

[0042] Preparation of tungsten-nick...

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Abstract

The invention belongs to the technical field of polishing and material surface structure determination and provides tungsten-nickel-iron alloy polishing solution as well as an alloy surface polishingmethod and a metallographic preparation method. The polishing solution comprises nano abrasive particles, an oxidizing agent, a viscosity adjusting agent, a pH regulator and deionized water, and a range of pH of the polishing solution is 2.5-3.5, 6.5-7.5 or 9.5-10.5. The invention adopts the self-made polishing solution for performing chemical mechanic polishing on a tungsten-nickel-iron alloy, different polished surfaces can be obtained by selecting different polishing solution parameters according to polishing conditions, the obtain optimal surface roughness Ra is lower than 5nm, processingrequirement of nanoscale surface roughness of a tungsten alloy can be met, and a workpiece polished by adopting the polishing solution has an ultra-smooth surface, can be directly applied to metallographic observation and is clear and complete in metallographic tissue structure.

Description

technical field [0001] The invention belongs to the technical field of polishing processing and material surface structure measurement, and in particular relates to a tungsten-nickel-iron alloy polishing liquid, an alloy ultra-smooth surface polishing process and a metallographic preparation method. Background technique [0002] Tungsten-nickel-iron alloy is a high-performance two-phase alloy formed by mixing and sintering high melting point tungsten and low melting point nickel and iron. Among them, the tungsten phase exists in the form of body-centered cubic, while the matrix phase composed of tungsten, nickel, and iron exists in the form of face-centered cubic. The two phases combine with each other to form tungsten-nickel-iron alloy. The structure makes tungsten-nickel-iron alloy have excellent physical and chemical properties such as high density, high strength, good radiation shielding and strong corrosion resistance, and is widely used in military, aerospace, targetin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/32C23F3/06
CPCC23F3/06G01N1/32
Inventor 康仁科焦振华郭江董志刚
Owner DALIAN UNIV OF TECH
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