Gold alloys and methods for manufacturing gold alloys
By dispersing a hypermaterial in a gold matrix, the gold alloy achieves high hardness and purity, addressing the processing challenges of soft gold while maintaining its valuable properties.
JP7894649B2Active Publication Date: 2026-07-24TOKYO UNIVERSITY OF SCIENCE
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Patent Information
- Application Number
- JP2023511208
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2021-03-29
- Filing Date
- 2022-03-25
- Publication Date
- 2026-07-24
- Estimated Expiration
- 2042-03-25
AI Technical Summary
Technical Problem
Gold is soft and easily scratched, making it difficult to process into thin shapes like jewelry without reducing its purity, and existing methods to increase hardness, such as solid solution strengthening, risk decreasing gold purity.
Method used
Dispersing a hypermaterial with a specific composition, represented by the formula Au 100-(a+b) X a RE b, where X is Al, Ga, In, Si, or Ge, and RE is a rare earth element, in a gold matrix, achieving high hardness without significantly reducing gold purity.
Benefits of technology
The resulting gold alloy maintains high gold purity and exhibits hardness comparable to low-carbon steel, enabling effective processing into jewelry without significant purity loss.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention provides a gold alloy and a method for producing the same, the gold alloy including: gold; and an Au-X-RE-based hypermaterial represented by the compositional formula Au100-(a+b)XaREb, X in the compositional formula being at least one atom selected from the group consisting of Al, Ga, In, Si, Ge, and Sn, RE representing a rare earth element, and a and b being respectively the content of X and RE in at%, and the Au-X-RE-based hypermaterial satisfying conditions (1) and (2), the Au-X-RE-based hypermaterial being dispersed in a gold parent phase.
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