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Granato, A.V. Bains, Alijeet Singh 2012-06-28T22:04:41Z 2012-06-28T22:04:41Z 10000-01-01 2004 The non-exponential and non-linear behavior of relaxing glasses below the glass temperature, Tg, is a well known and poorly understood phenomena that is the subject of much experimental and theoretical effort. The Interstitialcy Theory, which describes glasses as perfect crystals with a few percent of interstitialcy defects, provides an atomic insight into the nature of relaxing glasses. The shear modulus, G, is uniquely sensitive to interstitialcies and provides a convenient way to monitor their changing concentrations. A non-contact EMAT technique is used to excite and detect a shear wave resonance in bulk amorphous metallic glass Pd40Ni40P20 during and after a small sudden change in temperature. A shear modulus relaxation is observed with enough precision to determine how its time constant, t , changes as the relaxation progresses. The results discriminate against models of glassy relaxation commonly found in the literature and are consistent with the Interstitialcy Theory. Submitted by Rachelle Ramer (rramer2@illinois.edu) on 2012-06-28T22:04:41Z No. of bitstreams: 1 Bains_Alijeet.pdf: 676593 bytes, checksum: f87515fa866d809bd115c994238c08fe (MD5) Made available in DSpace on 2012-06-28T22:04:41Z (GMT). No. of bitstreams: 1 Bains_Alijeet.pdf: 676593 bytes, checksum: f87515fa866d809bd115c994238c08fe (MD5) Previous issue date: 2004 Restriction data tranferred 2014-07-01T11:10:54-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: thesis/dissertation Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Rachelle Ramer (rramer2@illinois.edu) on 2012-06-28T22:04:41Z Item is restricted indefinitely. thesis/dissertation U of I Only Q. 541.0421 B161s FILM 2004 B161 http://hdl.handle.net/2142/32088 en ©2004 Bains relaxing glasses Interstitialcy Theory shear modulus relaxation Shear modulus relaxation of bulk metallic glass, Pd₄₀Ni₄₀P₂₀, near the glass temperature Dissertation / Thesis text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.