Authors: | Böhmer, Roland Senapati, H. Angell, C. A. |
Title: | Mechanical stress relaxation in inorganic glasses studied by a step-strain technique |
Language (ISO): | en |
Abstract: | A computer-controlled transient viscoelastometer, which is an adaption of the Rheovibron, has been developed to study the mechanical stress relaxation of amorphous materials over a range of more than five decades in time. The instrument was used to investigate the degree of non-exponentiality of the tensile stress autocorrelation function of AgI---Ag2SO4---Ag2WO4 and Ge---As---Se glasses. Upon variation of the composition, both ternary systems show large variations of the smearing of the calorimetric glass-transition anomaly. For most cases low-noise decay functions could be observed which are well fitted by stretched exponentials. For 50AgI·25Ag2SO4·25Ag2WO4 an exceptionally broad distribution of relaxation times is found. This is consistent with the sub-Tg specific heat peak previously observed in these mixed oxyanion glasses. For pure amorphous selenium two distinct relaxation processes are observed. |
URI: | http://hdl.handle.net/2003/25714 http://dx.doi.org/10.17877/DE290R-3309 |
Issue Date: | 1991-06-11 |
Provenance: | Elsevier Science |
URL: | http://dx.doi.org/10.1016/0022-3093(91)90295-H |
Citation: | Böhmer, R.; Senapati, H.; Angell, C. A.: Mechanical stress relaxation in inorganic glasses studied by a step-strain technique. In: Journal of Non-Crystalline Solids Jg. 131-133(1991), S. 182-186, doi: 10.1016/0022-3093(91)90295-H. |
Appears in Collections: | Böhmer, Roland Prof. Dr. |
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