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Gold based bulk metallic glass

Schroers, Jan and Lohwongwatana, Boonrat and Johnson, William L. and Peker, Atakan (2005) Gold based bulk metallic glass. Applied Physics Letters, 87 (6). Art. No. 061912. ISSN 0003-6951. http://resolver.caltech.edu/CaltechAUTHORS:SCHapl05

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Abstract

Gold-based bulk metallic glass alloys based on Au-Cu-Si are introduced. The alloys exhibit a gold content comparable to 18-karat gold. They show very low liquidus temperature, large supercooled liquid region, and good processibility. The maximum casting thickness exceeds 5 mm in the best glassformer. Au49Ag5.5Pd2.3Cu26.9Si16.3 has a liquidus temperature of 644 K, a glass transition temperature of 401 K, and a supercooled liquid region of 58 K. The Vickers hardness of the alloys in this system is similar to 350 Hv, twice that of conventional 18-karat crystalline gold alloys. This combination of properties makes the alloys attractive for many applications including electronic, medical, dental, surface coating, and jewelry.


Item Type:Article
Additional Information:©2005 American Institute of Physics. Received 7 February 2005; accepted 2 June 2005; published online 3 August 2005.
Subject Keywords:gold alloys; silver alloys; palladium alloys; copper alloys; silicon alloys; metallic glasses; casting; glass transition; Vickers hardness
Record Number:CaltechAUTHORS:SCHapl05
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:SCHapl05
Alternative URL:http://dx.doi.org/10.1063/1.2008374
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3467
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:08 Jun 2006
Last Modified:26 Dec 2012 08:54

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