Frequency Dependence Modulus of Pd₄₀Ni₁₀Cu₃₀P₂₀ Amorphous Alloy around the Glass Transition by Dynamic Mechanical Analysis
Dynamic Mechanical Analyzer (DMA) was used to study the frequency dependence of storage and loss modulus of amorphous Pd₄₀Ni₁₀Cu₃₀P₂₀ alloy over a broad frequency range around its glass transition temperature. The amorphous samples were subjected to two testing conditions: constant frequency with co...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | en_US |
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2003
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| Online Access: | http://hdl.handle.net/1721.1/3973 |
| _version_ | 1824457837374341120 |
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| author | Lee, M.L. Li, Yi Feng, Y.P. Carter, W. Craig |
| author_facet | Lee, M.L. Li, Yi Feng, Y.P. Carter, W. Craig |
| author_sort | Lee, M.L. |
| collection | MIT |
| description | Dynamic Mechanical Analyzer (DMA) was used to study the frequency dependence of storage and loss modulus of amorphous Pd₄₀Ni₁₀Cu₃₀P₂₀ alloy over a broad frequency range around its glass transition temperature. The amorphous samples were subjected to two testing conditions: constant frequency with continuous heating and isothermal with frequency sweep. The storage modulus Eâ² exhibited a sigmoidal change from about 90 GPa to a low value of about 0 GPa over the glass transition region. The loss modulus, Eâ³, was characterized by an asymmetrical peak with a smaller slope at the low temperature side than at the high temperature side upon heating. These changes in moduli were associated with mechanical relaxation due to atomic motion. Similar results were also obtained under isothermal condition. The Kohrausch-Williams-Watts function was used to fit the data obtained under the isothermal condition. The peak frequencies obtained were then fitted to the VFT equation and the scaling law equation. |
| first_indexed | 2024-09-23T11:02:50Z |
| format | Article |
| id | mit-1721.1/3973 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:02:50Z |
| publishDate | 2003 |
| record_format | dspace |
| spelling | mit-1721.1/39732019-04-11T03:53:49Z Frequency Dependence Modulus of Pd₄₀Ni₁₀Cu₃₀P₂₀ Amorphous Alloy around the Glass Transition by Dynamic Mechanical Analysis Lee, M.L. Li, Yi Feng, Y.P. Carter, W. Craig Dynamic Mechanical Analyzer frequency dependence modulus amorphous Pd₄₀Ni₁₀Cu₃₀P₂₀ alloy Kohrausch-Williams-Watts function Dynamic Mechanical Analyzer (DMA) was used to study the frequency dependence of storage and loss modulus of amorphous Pd₄₀Ni₁₀Cu₃₀P₂₀ alloy over a broad frequency range around its glass transition temperature. The amorphous samples were subjected to two testing conditions: constant frequency with continuous heating and isothermal with frequency sweep. The storage modulus Eâ² exhibited a sigmoidal change from about 90 GPa to a low value of about 0 GPa over the glass transition region. The loss modulus, Eâ³, was characterized by an asymmetrical peak with a smaller slope at the low temperature side than at the high temperature side upon heating. These changes in moduli were associated with mechanical relaxation due to atomic motion. Similar results were also obtained under isothermal condition. The Kohrausch-Williams-Watts function was used to fit the data obtained under the isothermal condition. The peak frequencies obtained were then fitted to the VFT equation and the scaling law equation. Singapore-MIT Alliance (SMA) 2003-12-20T19:34:53Z 2003-12-20T19:34:53Z 2002-01 Article http://hdl.handle.net/1721.1/3973 en_US Advanced Materials for Micro- and Nano-Systems (AMMNS); 1649377 bytes application/pdf application/pdf |
| spellingShingle | Dynamic Mechanical Analyzer frequency dependence modulus amorphous Pd₄₀Ni₁₀Cu₃₀P₂₀ alloy Kohrausch-Williams-Watts function Lee, M.L. Li, Yi Feng, Y.P. Carter, W. Craig Frequency Dependence Modulus of Pd₄₀Ni₁₀Cu₃₀P₂₀ Amorphous Alloy around the Glass Transition by Dynamic Mechanical Analysis |
| title | Frequency Dependence Modulus of Pd₄₀Ni₁₀Cu₃₀P₂₀ Amorphous Alloy around the Glass Transition by Dynamic Mechanical Analysis |
| title_full | Frequency Dependence Modulus of Pd₄₀Ni₁₀Cu₃₀P₂₀ Amorphous Alloy around the Glass Transition by Dynamic Mechanical Analysis |
| title_fullStr | Frequency Dependence Modulus of Pd₄₀Ni₁₀Cu₃₀P₂₀ Amorphous Alloy around the Glass Transition by Dynamic Mechanical Analysis |
| title_full_unstemmed | Frequency Dependence Modulus of Pd₄₀Ni₁₀Cu₃₀P₂₀ Amorphous Alloy around the Glass Transition by Dynamic Mechanical Analysis |
| title_short | Frequency Dependence Modulus of Pd₄₀Ni₁₀Cu₃₀P₂₀ Amorphous Alloy around the Glass Transition by Dynamic Mechanical Analysis |
| title_sort | frequency dependence modulus of pd₄₀ni₁₀cu₃₀p₂₀ amorphous alloy around the glass transition by dynamic mechanical analysis |
| topic | Dynamic Mechanical Analyzer frequency dependence modulus amorphous Pd₄₀Ni₁₀Cu₃₀P₂₀ alloy Kohrausch-Williams-Watts function |
| url | http://hdl.handle.net/1721.1/3973 |
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