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Precious metal product with plating layer on surface and preparation method thereof

A technology of precious metals and products, which is applied in the field of precious metal products with coating on the surface and its preparation, and can solve the problems of weak bonding between the film layer and the substrate

Pending Publication Date: 2018-09-25
SHENZHEN UNITED BLUEOCEAN TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, PVD is only suitable for coating on the surface of materials with higher hardness. When coating the surface of materials with lower hardness (such as Mohs hardness of 2-3), the bonding force between the film layer and the substrate is still weak.

Method used

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  • Precious metal product with plating layer on surface and preparation method thereof
  • Precious metal product with plating layer on surface and preparation method thereof
  • Precious metal product with plating layer on surface and preparation method thereof

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preparation example Construction

[0034] The second aspect of the present invention provides a method for preparing a noble metal product, the method comprising: attaching a physical vapor deposition layer 2 on the surface of a noble metal substrate 1 by means of physical vapor deposition.

[0035] According to the present invention, the condition of physical vapor deposition makes the thickness of physical vapor deposition layer 2 be 10nm-50μm (such as 10nm, 20nm, 30nm, 50nm, 80nm, 0.1μm, 0.15μm, 0.2μm, 0.25μm, 0.3μm, 0.5μm , 0.8 μm, 1 μm, 2 μm, 10 μm, 30 μm, 50 μm or any value between the aforementioned values), preferably 0.04 μm-2 μm.

[0036] The method of physical vapor deposition has no special requirements, and it can be vacuum evaporation coating, vacuum sputtering coating or vacuum ion coating, preferably vacuum ion coating.

[0037] If vacuum evaporation coating is adopted, the vacuum evaporation system is used, the precious metal substrate 1 and the metal to be plated are placed in the vacuum evapo...

Embodiment 1

[0072] The present embodiment is to adopt the method of the present invention to prepare the pure gold gold product of brown TiAlN film plating, its structure is as figure 1 shown.

[0073] (1) Pretreatment

[0074] Select precious metal substrate 1: choose pure gold as the precious metal substrate 1, and its surface roughness is 0.02 μm;

[0075] Cleaning: ultrasonically clean the pure gold with distilled water for 10 minutes at 20 kHz, and dry the pure gold after ultrasonic cleaning at 150°C for 30 minutes; then use a dust-free cloth dipped in 98% by weight alcohol to wipe and clean the surface;

[0076] Vacuum in the furnace: put the dried pure gold in the vacuum furnace, adjust the vacuum degree to 3×10 -3 Pa to ensure a clean vacuum environment in the furnace.

[0077] (2) Deposit Physical Vapor Deposition Layer 2

[0078] Glow cleaning: Glow cleaning is performed under the conditions of argon gas flow rate of 300 sccm, loading bias voltage of 400V, duty cycle of 50%, a...

Embodiment 2

[0081] The present embodiment is to adopt the method of the present invention to prepare the pure gold gold product of gray-black plated CrN film.

[0082] (1) Pretreatment

[0083] Select precious metal substrate 1: choose pure gold as the precious metal substrate 1, and its surface roughness is 0.05 μm;

[0084] Cleaning: Ultrasonic cleaning of pure gold with distilled water for 5 minutes under the condition of 30kHz, and drying the cleaned pure gold at 150°C for 30 minutes; then wipe the surface with 98% alcohol by weight;

[0085] Vacuum in the furnace: put the dried pure gold in the vacuum furnace, adjust the vacuum degree to 3×10 -3 Pa, adjust the temperature in the furnace to 200°C.

[0086] (2) Deposit Physical Vapor Deposition Layer 2

[0087] Glow cleaning: Glow cleaning is performed under the conditions of argon gas flow rate of 300 sccm, loading bias voltage of 400V, duty cycle of 50%, and time of 400s.

[0088] Start the high-purity intermediate frequency chro...

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Abstract

The invention relates to the field of gold surface plating and discloses a precious metal product with a plating layer on the surface and a preparation method thereof. The precious metal product comprises a precious metal matrix and a physical vapor deposited layer attached to the surface of the precious metal matrix. The precious metal is gold or silver. The preparation method of the precious metal product comprises ultrasonically treating the precious metal matrix, and depositing a metal nitride, metal carbonitride, metal oxide, metal carbide, metal fluoride, metal sulfide, metal boride or DLC physical vapor deposition layer on the surface of the precious metal matrix by physical vapor deposition. Through synergistic adjustment of the deposited metal, protective gas and a gas flow rate,the precious metal product can exhibit a plurality of colors. The formed film is stable and is not easy to fall off. In detection, the film on the surface of the precious metal product does not influence the color of the precious metal matrix.

Description

technical field [0001] The invention relates to the field of gold surface coating, in particular to a precious metal product with a coating on the surface and a preparation method thereof. Background technique [0002] Gold products are bright in color and have good stability. They are usually used as jewelry and are widely welcomed by consumers. At present, the production process of gold products mainly includes casting wax, pouring molds, and surface trimming and shaping. In order to improve the glossiness of the surface of the gold product, the surface of the gold product is usually treated by electroplating. [0003] CN106521594A discloses a manufacturing method and equipment for processing K gold into the true color of gold. The semi-finished jewelry is prepared in advance; the semi-finished jewelry is electroplated to restore the outer color to the true color of gold; the semi-finished jewelry after electroplating is surface treated , forming finished jewelry. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/02C23C14/06C23C14/16C23C14/24C23C14/32C23C14/34C23C28/00
CPCC23C14/0021C23C14/0036C23C14/02C23C14/0605C23C14/0641C23C14/0694C23C14/16C23C14/24C23C14/325C23C14/34C23C28/30
Inventor 王彤唐双喜
Owner SHENZHEN UNITED BLUEOCEAN TECH DEV
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