CaltechAUTHORS
  A Caltech Library Service

Amorphous metallic foam

Schroers, Jan and Veazey, Chris and Johnson, William L. (2003) Amorphous metallic foam. Applied Physics Letters, 82 (3). pp. 370-372. ISSN 0003-6951. http://resolver.caltech.edu/CaltechAUTHORS:SCHRapl03

[img]
Preview
PDF
See Usage Policy.

298Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:SCHRapl03

Abstract

The bulk glass forming alloy Pd43Ni10Cu27P20 is processed into a low-density amorphous metallic foam. Pd43Ni10Cu27P20 is mixed with hydrated B2O3, which releases gas at elevated temperature and/or low pressure. Very homogeneous foams are achieved due to the high viscosity of the alloy even at its liquidus temperature. By processing at the liquidus temperature and decreasing the pressure to 10^–2 mbar, well-distributed bubbles expand to foam the material. Foam densities as low as 1.4×10^3 kg/m^3 were obtained, corresponding to a bubble volume fraction of 84%. The bubble diameter ranges between 2×10^–4 and 1×10^–3 m. Thermal analysis by differential scanning calorimetry confirms the amorphous nature of the foam. Furthermore, it reveals that the foam's thermal stability is comparable to the bulk material.


Item Type:Article
Additional Information:©2003 American Institute of Physics. (Received 19 September 2002; accepted 19 November 2002) This work was supported by Liquidmetal Technology. The authors express their gratitude to Kristen Virdone for technical assistance.
Subject Keywords:palladium alloys; nickel alloys; copper alloys; phosphorus alloys; foams; bubbles; density; viscosity; amorphous state; differential scanning calorimetry; thermal stability; liquid alloys; materials preparation; porous materials
Record Number:CaltechAUTHORS:SCHRapl03
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:SCHRapl03
Alternative URL:http://dx.doi.org/10.1063/1.1537514
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:8533
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:17 Aug 2007
Last Modified:26 Dec 2012 09:39

Repository Staff Only: item control page