Precious metal based amorphous alloys

• US 6,749,698 B2
• Filed: 03/27/2002
• Issued: 06/15/2004
• Est. Priority Date: 08/07/2000
• Status: Active Grant

• Current Assignee: Tanaka Kikinzoku Kogyo Kabushiki Kaisha (Tanaka Holdings Company Limited)
• Original Assignee: Tanaka Kikinzoku Kogyo Kabushiki Kaisha (Tanaka Holdings Company Limited)
• Inventors: Shimizu, Susumu, Shioda, Shigeo, Mori, Kenya
• Primary Examiner(s): Yee, Deborah
• Application Number:
  US10/088,494
• Publication Number:
  US 20030000601A1
• Time in Patent Office: 811 Days
• Field of Search: 148/403, 420/466
• US Class Current: 148/403
• CPC Class Codes: C22C 45/003 with one or more of the noble metals as major constituent

Abstract

The present invention is a precious metal-based amorphous alloy having a Pt—Cu—P based structure including in atomic %: 50≦Pt≦75%, 5≦Cu≦35%, and 15≦P≦25% and is a precious metal-based amorphous alloy having a Pt—Pd—Cu—P based structure including in atomic %: 5≦Pt≦70%, 5≦Pd≦50%, 5≦Cu≦50%, and 5≦P≦30%. Preferably, cooling rates for manufacturing the alloys having these compositions are 10⁻¹ to 10²° C./sec. for the Pt—Cu—P based structure and 10¹ to 10²° C./sec. for the Pt—Pd—Cu—P based structure.

Claims

1. A precious metal-based amorphous alloy having a Pt—

Cu—

P based structure, wherein said alloy comprises in atomic %, 50≦

Pt≦

75%, 5≦

Cu≦

35%, and 15≦

P≦

25%.

2. The precious metal-based amorphous alloy according to claim 1, wherein said alloy is obtained through solidifying the amorphous alloy in a molten state at a cooling rate of 10⁻

1 to 10² C./sec.