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lattice thermal conductivity copper alloys extremely low temperatures thermal phonon scattering Lattice thermal conductivity of copper alloys below 2 K Anderson, A.C. Vorhaus, James Louis 2011-07-05T19:10:01Z 2011-07-05T19:10:01Z 10000-01-01 1976 Thermal conductivity measurements have been made between 0.06 and 2 K on copper samples containing either 10 atomic percent aluminum, 30 atomic percent zinc, or 4 atomic percent nickel. These samples were studied in both annealed and heavily deformed conditions. No unusual behavior has been observed in the thermal conductivity of any of the alloys near 0.5 K as had previously been reported. In the CuAl alloy system a number of observations were made on the thermal transport properties of the phonons. The scattering of thermal phonons by conduction electrons below T z 1 K was found to be in good agreement with theory. A resonant interaction appears to exist between the phonons and dislocations at a resonant frequency of ~ 10^11 Hz. Several models of resonating dislocations are examined with respect to this data. The scattering of thermal phonons by dislocations in heavily deformed samples was also studied. No conclusions could be drawn about the mechanism or mechanisms involved in this scattering. Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-07-05T19:10:01Z No. of bitstreams: 1 1976_vorhaus.pdf: 4241890 bytes, checksum: 7b0397d415c2fd5c6cc02f0016a6825e (MD5) Made available in DSpace on 2011-07-05T19:10:01Z (GMT). No. of bitstreams: 1 1976_vorhaus.pdf: 4241890 bytes, checksum: 7b0397d415c2fd5c6cc02f0016a6825e (MD5) Previous issue date: 1976 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-07-05T19:10:01Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:32:42-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis Thesis U of I Only 3929513 http://hdl.handle.net/2142/25663 en Copyright 1976 James Louis Vorhaus Dissertation / Thesis text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.