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Medical Au-Pt-Pd alloy

A kind of au-pt-pd, medical technology, applied in the field of Au-Pt-Pd alloy, can solve the problems such as unresolved artifacts, achieve excellent mechanical properties, good durability, and improve the effects of artifacts

Active Publication Date: 2022-03-18
TANAKA PRECIOUS METAL IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For devices with ultra-high magnetic fields, the problem of artifacts cannot be solved with existing countermeasures

Method used

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  • Medical Au-Pt-Pd alloy
  • Medical Au-Pt-Pd alloy
  • Medical Au-Pt-Pd alloy

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Embodiment Construction

[0065] Embodiments of the present invention will be described below. In this embodiment, Au—Pt—Pd alloys of various compositions were produced, and both magnetic properties and mechanical properties were evaluated.

[0066] For the Au-Pt-Pd alloy, raw material metals of pure Au, pure Pt, and pure Pd with a purity of 99.99% were weighed to form various compositions, and alloy ingots were cast by high-frequency melting (crucible: zirconia Crucible, mold: water-cooled Cu mold, maximum output power during melting: 2.5kW). Through this melting and casting process, an ingot of a master alloy having a diameter of 7 mm×65 mm was produced.

[0067] Next, this master alloy was subjected to a homogenization treatment by heating in an Ar atmosphere at a temperature of 1100° C. for 1 hour. After this heat treatment, the master alloy is water-cooled.

[0068] Then, the homogenized master alloy is subjected to plastic working and solution treatment. In the plastic working process, swagin...

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Abstract

The present invention relates to a medical Au-Pt-Pd alloy comprising Au, Pt, Pd, and unavoidable impurities. In an Au-Pt-Pd ternary phase diagram, the alloy is composed of an alloy inside a polygon (A1-A2-A3-A4) which is defined by points A1 (53 at%, 4 at%, and 43 at% of Pd), points A2 (70 at%, 4 at%, and 26 at% of Pd), points A3 (69.9 at%, 30 at%, and 0.1 at% of Pd), and points A4 (49.9 at%, 50 at%, and 0.1 at% of Pd) in a straight line manner. Furthermore, an Au-rich phase and / or a Pt-rich phase are distributed in the metallographic structure of the alloy, and the total of the area ratio of the Au-rich phase and the area ratio of the Pt-rich phase is 1.5-25.4% (inclusive).

Description

technical field [0001] The present invention relates to an Au-Pt-Pd alloy suitable as a medical material constituting medical devices such as embolic coils and embolic clips. Specifically, it relates to a medical material capable of reducing artifacts in a magnetic field environment and having excellent mechanical properties, and a method for producing the same. Background technique [0002] The usefulness of endovascular therapy has attracted attention as a treatment method for cerebrovascular diseases such as cerebral aneurysm and subarachnoid hemorrhage. Various types of medical devices, such as embolic coils, embolic clips, stents, catheters, and coils, are used as medical devices in treatment methods such as intravascular therapy. Such medical devices are directly in contact with the human body and embedded in the human body, and therefore require biocompatibility and chemical stability (corrosion resistance). In addition, mechanical properties such as strength and el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/02C22C1/02C22F1/14C22C30/00A61B17/12A61F2/82A61M25/00A61M25/09
CPCC22C5/02C22C1/02C22F1/14C22C30/00A61B17/12109A61B17/1214A61F2/82A61M25/00A61M25/09A61L29/02A61L31/022
Inventor 大久保道正后藤研滋田中邦弘白石康次郎岛邦弘加藤佑弥浜田贤一誉田荣一武川恵美
Owner TANAKA PRECIOUS METAL IND