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Amorphous soft magnetic alloy coatings and preparation method thereof

A soft magnetic alloy and coating technology, applied in the direction of metal material coating process, coating, magnetic material, etc., can solve the problems of difficult to cover the surface, the coating pollutes the environment, and the preparation process is complicated.

Active Publication Date: 2009-05-27
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0009] The current technology of amorphous alloy electromagnetic shielding technology mainly has the following deficiencies: (1) amorphous soft magnetic alloys are mainly used in the form of strips, flakes, fibers or powders, and it is difficult to cover complex surfaces when using strips , and when used in flakes, fibers or powders, it is often prepared as a composite material, and the preparation process is more complicated; (2) the cost of preparing a thermal sprayed coating composite plate using a Co-based amorphous alloy is relatively high, and the saturation magnetic induction is relatively low; (3) The use of electroplating or other sputtering deposition methods to prepare coatings has the disadvantages of polluting the environment or high preparation costs, and is not suitable for large-area shielding

Method used

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  • Amorphous soft magnetic alloy coatings and preparation method thereof
  • Amorphous soft magnetic alloy coatings and preparation method thereof
  • Amorphous soft magnetic alloy coatings and preparation method thereof

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preparation example Construction

[0037] The preparation method of the coating of the present invention comprises the first step of preparing an alloy powder having the above-mentioned composition range;

[0038] In the second step, the powder is screened, and the powder with a particle size of 400-50 mesh, more preferably 400-100 mesh, is selected as the thermal spraying material;

[0039] In the third step, the amorphous electromagnetic shielding coating is prepared by plasma spraying or high-speed flame spraying.

[0040] In a preferred embodiment of the present invention, in the first step, the iron-based amorphous alloy powder can be prepared by atomization or milling, and the prepared powder is a pre-alloyed powder;

[0041] In the second step, the sieving of the iron-based amorphous alloy powder can be achieved by using an experimental sieve, a standard slap-type vibrating sieve, other types of vibrating sieves or air-flow powder classification equipment;

[0042] In a preferred embodiment of the prese...

Embodiment

[0049] The powders were prepared by water atomization, gas atomization, and pulverization after spraying, respectively. The powder composition is shown in Table 1. After sieving, 400-50 mesh powder is obtained, and the coating is prepared by plasma and high-speed flame spraying. The substrate is copper, and sandblasting is carried out before spraying. ) flow: 70-80L / min, hydrogen flow: 15-20L / min, spraying distance 100-120mm, powder feeding speed 50-60g / min; high-speed flame spraying process parameters: O2 pressure and flow 1.0MPa and 200-240L / min, propane pressure and flow 0.75MPa and 60~70L / min, air pressure and flow. 0.7MPa and 300~350L / min, powder feeding speed 45~55g / min, spraying distance 250mm. The process and coating properties are shown in Table 2.

[0050] Taking component 2 as an example for further specific analysis is as follows.

[0051] figure 1 It is the XRD diffraction pattern of No. 2 component powder (a) and sprayed layer (b), and it can be seen that th...

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Abstract

The present invention relates to an amorphous soft magnetic alloy coating and the preparation method thereof. Particularly the invention relates to a amorphous soft magnetic alloy coating characterized in that content of the coating material is as following: Cr from 0.5 wt% to 8 wt%, Mo from 1 wt% to 12 wt%, Sn from 1 wt% to 8 wt%, P from 3 wt% to 10 wt%, C from 0.1 wt% to 1.5 wt%, B from 0.1 wt% to 3 wt%, Si from 0.1 wt% to 6 wt%, and balance of Fe; over 50 volume% of the coating is amorphous structure. The present invention also relates to the usage of the coating and the preparation method thereof.

Description

technical field [0001] The invention belongs to the field of electromagnetic shielding, and in particular relates to an amorphous soft magnetic alloy coating, a preparation method and application thereof. Background technique [0002] With the popularization of various electrical appliances and the wide application of electronic computers, communication satellites, high-voltage transmission grids, etc., the electromagnetic environment has become increasingly complex, and electromagnetic pollution has become a major public hazard in today's society. Electromagnetic radiation will not only interfere with the normal operation of some highly integrated, high-speed and digital electrical equipment, but also electromagnetic radiation of different frequencies and intensities flooding the living environment has also brought people such as electromagnetic interference, electromagnetic leaks, and hazards. health and other issues. [0003] Electromagnetic shielding is an effective mea...

Claims

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Application Information

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IPC IPC(8): H01F1/153C22C38/34C22C38/32C22C1/04C23C4/06C22C45/02C23C4/129C23C4/134
Inventor 倪晓俊赵新彬卢志超吴嘉伟薄希辉郭金花李德仁孙克周少雄
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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