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Rigid decorative member

A decorative component and hard technology, applied in clothing, instruments, clocks and other directions, can solve the problems of low corrosion resistance, low brightness, and inability to thicken the film thickness of Mo coating, and achieve the effect of suppressing the deterioration of appearance quality

Inactive Publication Date: 2014-12-10
CITIZEN WATCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low corrosion resistance of the Mo coating film, there is a problem that it cannot be directly used
In addition, although it is proposed to adopt a high-quality Cr coating film with good brightness, color tone, low spatter, and a sense of luxury, the film hardness of the Cr coating film is low, and sufficient damage resistance cannot be obtained. In addition, since the corrosion resistance is very high, There is a problem that peeling in the manufacturing process is difficult
[0006] On the other hand, as the outermost layer, Nb carbide film and Ta carbide film with high hardness and corrosion resistance are also proposed, but because of their low adhesion to the base material, the film thickness cannot be thickened, and the damage resistance Low brightness and low brightness, therefore, these coating films also have the problem that they cannot be used directly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] In Example 1, as a sputtering target, a sintered body with Cr50wt% was used. Such as figure 2 As shown, as the base material 21, the SUS316L material stipulated in JIS is adopted, and a CrMo alloy carbide film with a thickness of 1.8 μm is formed on the base material 21 by the sputtering method used at a flow rate of 105 sccm Ar gas and a flow rate of 30 sccm. Hard decorative member 20 .

[0084] image 3 It is a graph comparing the film hardness of the CrMo alloy carbide film prepared by changing the amount of methane gas, and the film hardness of the Cr carbide film and the Mo carbide film. Furthermore, it can be seen that the CrMo alloy carbide film exhibits significantly higher hardness than the Cr carbide film, and also exhibits a high hardness not inferior to the Mo carbide film.

[0085] The scratch resistance performance is roughly determined by the product of the hardness of the wear-resistant layer, the film thickness of the wear-resistant layer, the degre...

Embodiment 2

[0095] In Example 2, as a sputtering target, a sintered body of Cr50wt%Mo50wt% was used similarly to the examples. Such as Figure 8 As shown, a SUS316L material specified in JIS was used as the base material 31 , and an adhesion layer 32 made of a CrMo alloy lower oxide of 0.1 μm was formed on the base material 31 by a sputtering method. Then, while introducing a small amount of oxygen, methane gas was increased in a gradient to form a gradient adhesive layer 33 of a 0.2 μm CrMo alloy oxycarbide film. Then, a 2.0 μm thin-film wear-resistant layer 34 composed of a CrMo alloy carbide film was formed. Then, methane gas was reduced in a gradient to form a color gradient layer 35 of 0.1 μm CrMo alloy carbide film, and the hard decorative member 30 was produced. The appearance color of the rigid decorative component 30 obtained in Example 2 is represented by the Lab color space as L*: 83.74, a*: 0.37, b*: 0.51, and the appearance color L* of the SUS316L substrate 31: 85.1, a*: 0...

Embodiment 3

[0102] In Example 3, as a sputtering target, a sintered body of Cr50wt%Nb50wt% was used. Such as Figure 10 As shown, a SUS316L material specified in JIS was used as the base material 41 , and an adhesion layer 42 composed of a CrNb alloy lower oxide of 0.1 μm was formed on the base material 41 by sputtering. Then, nitrogen gas was increased in a gradient while introducing a small amount of oxygen, thereby forming a gradient adhesive layer 43 of a 0.2 μm CrNb alloy oxynitride film. Then, a 1.8 μm thin-film wear-resistant layer 44 made of a CrNb alloy nitride film was formed. Then, nitrogen gas was reduced in a gradient to form a color gradient layer 45 of a 0.1 μm CrNb alloy nitride film to produce a hard decorative member 40 .

[0103] The appearance color of the rigid decorative member 40 obtained in Example 3 expressed based on the Lab color space is L*: 83.37, a*: 0.05, b*: 0.61, and the appearance color of the SUS316L substrate 41, L*: 85.1, a*: 0.38, b*: 2.34 are almo...

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Abstract

Provided is a rigid decorative member having high film hardness, excellent scratch resistance properties and abrasion resistance properties, and excellent color tones of brightness and color saturation. This rigid decorative member is characterized by the formation, upon a substrate, of a reaction compound film of: an alloy of Cr and at least one type of metal selected from Mo, W, Nb, Ta, Ti, Hf, Zr, and V; and a non-metal element selected from at least one or type from among nitrogen, carbon, and oxygen. Provided is the rigid decorative member which has dramatically improved scratch resistance and abrasion resistance, has a high-grade color tone, and whereby a product having brightness and color saturation color tones that can be freely controlled is supplied. This rigid decorative member is configured from a reaction compound film of: an alloy of Cr, being a metal having high adhesion to metal and high brightness but having low hardness, and a metal (Mo, W, Nb, Ta, Ti, Hf, Zr, or V) having high film hardness and corrosion resistance, but having low brightness and adhesion; and a non-metal element such as nitrogen, carbon, or oxygen.

Description

technical field [0001] The present invention relates to watch exterior parts with metallic colors, accessories such as glasses and jewelry, decorative components such as decorations, and sporting goods, and particularly relates to high brightness, high-grade color feeling, excellent long-term damage resistance, wear resistance, Corrosion resistant white or stainless steel colored hard trim elements. Background technique [0002] Traditionally, in order to improve the damage resistance of exterior parts, glasses, jewelry, clocks and other accessories, decorations, sporting goods, etc., the outermost layer is formed on the outermost layer in order to have a high-end appearance. High-brightness platinum coating. For example, in Patent Document 1, a base layer is formed on a substrate, a Ti carbide film is formed on the surface of the base layer by dry plating, and a platinum or platinum alloy is formed on the surface of the Ti carbide film by dry plating. Decorative film. Ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/16A44C27/00C23C14/06
CPCC23C14/0015C23C14/165C23C14/0021C23C14/024C23C28/044C23C28/042C23C28/048G04B37/223C23C14/0036C23C14/0635C23C14/0641C23C14/08
Inventor 高崎康太郎
Owner CITIZEN WATCH CO LTD
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