Separating the configurational and vibrational entropy contributions in metallic glasses. Smith, H. L, Li, C. W, Hoff, A., Garrett, G. R, Kim, D. S, Yang, F. C, Lucas, M. S, Swan-Wood, T., Lin, J Y Y, Stone, M B, Abernathy, D L, Demetriou, M. D, & Fultz, B Nat. Phys., 13(9):900–905, Nature Publishing Group, May, 2017. abstract bibtex Glassy materials exist in nature and play a critical role in technology, but key differences between the glass, liquid and crystalline phases are not well understood. Over several decades there has been controversy about the specific heat absorbed as a glass transforms to a liquid—does this originate from vibrational entropy or configurational entropy? Here we report direct in situ measurements of the vibrational spectra of strong and fragile metallic glasses in the glass, liquid and crystalline phases. For both types of material, the measured vibrational entropies of the glass and liquid show a tiny excess over the crystal, representing less than 5% of the total excess entropy measured with step calorimetry. These results reveal that the excess entropy of metallic glasses is almost entirely configurational in origin, consistent with the early theories of Gibbs and co-workers describing the glass transition as a purely configurational transition. When a glass transforms into a liquid, is the absorbed specific heat vibrational or configurational in origin? Vibrational spectroscopy experiments on strong and fragile metallic glasses now strongly suggest the latter.
@ARTICLE{Smith2017-cp,
title = "{Separating the configurational and vibrational entropy
contributions in metallic glasses}",
author = "Smith, Hillary L and Li, Chen W and Hoff, Andrew and Garrett,
Glenn R and Kim, Dennis S and Yang, Fred C and Lucas, Matthew S
and Swan-Wood, Tabitha and Lin, J Y Y and Stone, M B and
Abernathy, D L and Demetriou, Marios D and Fultz, B",
abstract = "Glassy materials exist in nature and play a critical role in
technology, but key differences between the glass, liquid and
crystalline phases are not well understood. Over several decades
there has been controversy about the specific heat absorbed as a
glass transforms to a liquid---does this originate from
vibrational entropy or configurational entropy? Here we report
direct in situ measurements of the vibrational spectra of strong
and fragile metallic glasses in the glass, liquid and
crystalline phases. For both types of material, the measured
vibrational entropies of the glass and liquid show a tiny excess
over the crystal, representing less than 5\% of the total excess
entropy measured with step calorimetry. These results reveal
that the excess entropy of metallic glasses is almost entirely
configurational in origin, consistent with the early theories of
Gibbs and co-workers describing the glass transition as a purely
configurational transition. When a glass transforms into a
liquid, is the absorbed specific heat vibrational or
configurational in origin? Vibrational spectroscopy experiments
on strong and fragile metallic glasses now strongly suggest the
latter.",
journal = "Nat. Phys.",
publisher = "Nature Publishing Group",
volume = 13,
number = 9,
pages = "900--905",
month = may,
year = 2017,
keywords = "MyPapers (D.S. Kim);B.T. Futlz",
language = "en"
}
Downloads: 0
{"_id":"DwWxZ2QQKaaxomfwr","bibbaseid":"smith-li-hoff-garrett-kim-yang-lucas-swanwood-etal-separatingtheconfigurationalandvibrationalentropycontributionsinmetallicglasses-2017","author_short":["Smith, H. L","Li, C. W","Hoff, A.","Garrett, G. R","Kim, D. S","Yang, F. C","Lucas, M. S","Swan-Wood, T.","Lin, J Y Y","Stone, M B","Abernathy, D L","Demetriou, M. D","Fultz, B"],"bibdata":{"bibtype":"article","type":"article","title":"Separating the configurational and vibrational entropy contributions in metallic glasses","author":[{"propositions":[],"lastnames":["Smith"],"firstnames":["Hillary","L"],"suffixes":[]},{"propositions":[],"lastnames":["Li"],"firstnames":["Chen","W"],"suffixes":[]},{"propositions":[],"lastnames":["Hoff"],"firstnames":["Andrew"],"suffixes":[]},{"propositions":[],"lastnames":["Garrett"],"firstnames":["Glenn","R"],"suffixes":[]},{"propositions":[],"lastnames":["Kim"],"firstnames":["Dennis","S"],"suffixes":[]},{"propositions":[],"lastnames":["Yang"],"firstnames":["Fred","C"],"suffixes":[]},{"propositions":[],"lastnames":["Lucas"],"firstnames":["Matthew","S"],"suffixes":[]},{"propositions":[],"lastnames":["Swan-Wood"],"firstnames":["Tabitha"],"suffixes":[]},{"propositions":[],"lastnames":["Lin"],"firstnames":["J","Y","Y"],"suffixes":[]},{"propositions":[],"lastnames":["Stone"],"firstnames":["M","B"],"suffixes":[]},{"propositions":[],"lastnames":["Abernathy"],"firstnames":["D","L"],"suffixes":[]},{"propositions":[],"lastnames":["Demetriou"],"firstnames":["Marios","D"],"suffixes":[]},{"propositions":[],"lastnames":["Fultz"],"firstnames":["B"],"suffixes":[]}],"abstract":"Glassy materials exist in nature and play a critical role in technology, but key differences between the glass, liquid and crystalline phases are not well understood. Over several decades there has been controversy about the specific heat absorbed as a glass transforms to a liquid—does this originate from vibrational entropy or configurational entropy? Here we report direct in situ measurements of the vibrational spectra of strong and fragile metallic glasses in the glass, liquid and crystalline phases. For both types of material, the measured vibrational entropies of the glass and liquid show a tiny excess over the crystal, representing less than 5% of the total excess entropy measured with step calorimetry. These results reveal that the excess entropy of metallic glasses is almost entirely configurational in origin, consistent with the early theories of Gibbs and co-workers describing the glass transition as a purely configurational transition. When a glass transforms into a liquid, is the absorbed specific heat vibrational or configurational in origin? Vibrational spectroscopy experiments on strong and fragile metallic glasses now strongly suggest the latter.","journal":"Nat. Phys.","publisher":"Nature Publishing Group","volume":"13","number":"9","pages":"900–905","month":"May","year":"2017","keywords":"MyPapers (D.S. Kim);B.T. Futlz","language":"en","bibtex":"@ARTICLE{Smith2017-cp,\n title = \"{Separating the configurational and vibrational entropy\n contributions in metallic glasses}\",\n author = \"Smith, Hillary L and Li, Chen W and Hoff, Andrew and Garrett,\n Glenn R and Kim, Dennis S and Yang, Fred C and Lucas, Matthew S\n and Swan-Wood, Tabitha and Lin, J Y Y and Stone, M B and\n Abernathy, D L and Demetriou, Marios D and Fultz, B\",\n abstract = \"Glassy materials exist in nature and play a critical role in\n technology, but key differences between the glass, liquid and\n crystalline phases are not well understood. Over several decades\n there has been controversy about the specific heat absorbed as a\n glass transforms to a liquid---does this originate from\n vibrational entropy or configurational entropy? Here we report\n direct in situ measurements of the vibrational spectra of strong\n and fragile metallic glasses in the glass, liquid and\n crystalline phases. For both types of material, the measured\n vibrational entropies of the glass and liquid show a tiny excess\n over the crystal, representing less than 5\\% of the total excess\n entropy measured with step calorimetry. These results reveal\n that the excess entropy of metallic glasses is almost entirely\n configurational in origin, consistent with the early theories of\n Gibbs and co-workers describing the glass transition as a purely\n configurational transition. When a glass transforms into a\n liquid, is the absorbed specific heat vibrational or\n configurational in origin? Vibrational spectroscopy experiments\n on strong and fragile metallic glasses now strongly suggest the\n latter.\",\n journal = \"Nat. Phys.\",\n publisher = \"Nature Publishing Group\",\n volume = 13,\n number = 9,\n pages = \"900--905\",\n month = may,\n year = 2017,\n keywords = \"MyPapers (D.S. Kim);B.T. Futlz\",\n language = \"en\"\n}\n\n","author_short":["Smith, H. L","Li, C. W","Hoff, A.","Garrett, G. R","Kim, D. S","Yang, F. C","Lucas, M. S","Swan-Wood, T.","Lin, J Y Y","Stone, M B","Abernathy, D L","Demetriou, M. D","Fultz, B"],"bibbaseid":"smith-li-hoff-garrett-kim-yang-lucas-swanwood-etal-separatingtheconfigurationalandvibrationalentropycontributionsinmetallicglasses-2017","role":"author","urls":{},"keyword":["MyPapers (D.S. Kim);B.T. Futlz"],"metadata":{"authorlinks":{}}},"bibtype":"article","biburl":"https://bibbase.org/f/QeRhzDSTge8WnPe7d/Paperpile - MyPapers (D.S. Kim) - Nov 23.bib","dataSources":["G8KjaR7wDzykM3kB7"],"keywords":["mypapers (d.s. kim);b.t. futlz"],"search_terms":["separating","configurational","vibrational","entropy","contributions","metallic","glasses","smith","li","hoff","garrett","kim","yang","lucas","swan-wood","lin","stone","abernathy","demetriou","fultz"],"title":"Separating the configurational and vibrational entropy contributions in metallic glasses","year":2017}