Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published December 1985 | Published
Book Section - Chapter Open

Wear Properties of A Shock Consolidated Metallic Glass and Glass-Crystalline Mixtures

Abstract

Powder flakes prepared from 50 μm thick melt spun ribbons of Markomet 1064 (Ni_(52.5)Mo_(38)Cr_8 B_(1.5) wt%) were shock consolidatedin the unannealed and annealed condition. The unannealed flakes (microhardness 933 kg/mm^2) are amorphous while flakes annealed at 900ºC for 2 hours have an fcc structure with a grain size of 0.3 μm and microhardness of 800 kg/mm^2. The shock consolidated amorphous powder compact (250 kJ/kg shock energy) shows no crystal peaks in an X-ray diffractometer scan. Compacts of annealed powder (400 to 600 kJ/kg shock energies) contain amorphous material (18-21%) which was rapidly quenched from the melt formed at interparticle regions during the consolidation process. The microhardness of the amorphous interparticle material is 1100 kg/mm^2. Wear properties of the compacts measured in low velocity pin on disk tests show low average dynamic friction values (∿0.03). The 60 hour cumulative wear appears to correlate with the energy of shock compaction and surface porosity of the compacts rather than the metallic glass content.

Additional Information

© 1986 Materials Research Society. The shock consolidations were carried out using the facilities of Prof. Thomas Ahrens in the Caltech Seismological Laboratories and were supported in part by the National Science Foundation under Grant No. DMR-8315214 and the Caltech Program in Advanced Technologies sponsored by Aerojet General, General Motors, GTE, and TRW Laboratories. Wear Tests were performed by Mr. Marc Yesnik at the Roy C. Ingersoll Research Center.

Attached Files

Published - Wear_Properties_of_a_Shock_Consolidated_Metallic_Glass.pdf

Files

Wear_Properties_of_a_Shock_Consolidated_Metallic_Glass.pdf
Files (1.5 MB)

Additional details

Created:
August 19, 2023
Modified:
January 13, 2024