A new approach to the estimation of surface free energy based on Vickers microhardness data
A relation between surface free energy (σMHV) and Meyer’s lines cut-values has been established using Vickers microhardness (MHV) method and empirical physical laws. This relation allows the calculation of σMHV only from MHV data. The parameters required are Meyer’s lines cut-value...
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| Language: | English |
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Budapest University of Technology and Economics
2009-03-01
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| Series: | eXPRESS Polymer Letters |
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| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0000855&mi=cd |
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| description | A relation between surface free energy (σMHV) and Meyer’s lines cut-values has been established using Vickers microhardness (MHV) method and empirical physical laws. This relation allows the calculation of σMHV only from MHV data. The parameters required are Meyer’s lines cut-values and the mean value of diagonal length of the impression at different loads applied (drealmean). Our study of 12 samples of ultra high molecular weight polyethylene (PE-UHMW) showed that the new approach is applicable when the slope value of Meyer’s lines equals 2 (i.e. n = 2). A γ-60Co source was used for the irradiation of 11 samples (one of the samples investigated is un-irradiated) at room temperature in air. Doses of 1, 2, 5, 10, 20, 50, 100, 200, 500, 1000 and 1500 kGy were applied. The values of σMHV obtained are in a good agreement with the literature. The dependence of σMHV on the dose applied strictly corresponds to the radiation effects theory. MHV was measured at seven different loads – 0.0123, 0.0245, 0.049, 0.098, 0.196, 0.392, 0.785 N at a loading time of 30 s. |
| format | Article |
| id | doaj-art-0b1fc6521eb54c838c44bc0ced15354e |
| institution | Kabale University |
| issn | 1788-618X |
| language | English |
| publishDate | 2009-03-01 |
| publisher | Budapest University of Technology and Economics |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj-art-0b1fc6521eb54c838c44bc0ced15354e2025-08-20T03:32:51ZengBudapest University of Technology and EconomicseXPRESS Polymer Letters1788-618X2009-03-013313814410.3144/expresspolymlett.2009.18A new approach to the estimation of surface free energy based on Vickers microhardness dataA relation between surface free energy (σMHV) and Meyer’s lines cut-values has been established using Vickers microhardness (MHV) method and empirical physical laws. This relation allows the calculation of σMHV only from MHV data. The parameters required are Meyer’s lines cut-values and the mean value of diagonal length of the impression at different loads applied (drealmean). Our study of 12 samples of ultra high molecular weight polyethylene (PE-UHMW) showed that the new approach is applicable when the slope value of Meyer’s lines equals 2 (i.e. n = 2). A γ-60Co source was used for the irradiation of 11 samples (one of the samples investigated is un-irradiated) at room temperature in air. Doses of 1, 2, 5, 10, 20, 50, 100, 200, 500, 1000 and 1500 kGy were applied. The values of σMHV obtained are in a good agreement with the literature. The dependence of σMHV on the dose applied strictly corresponds to the radiation effects theory. MHV was measured at seven different loads – 0.0123, 0.0245, 0.049, 0.098, 0.196, 0.392, 0.785 N at a loading time of 30 s.http://www.expresspolymlett.com/letolt.php?file=EPL-0000855&mi=cdMaterial testingVickers microhardness (MHV)surface free energy |
| spellingShingle | A new approach to the estimation of surface free energy based on Vickers microhardness data eXPRESS Polymer Letters Material testing Vickers microhardness (MHV) surface free energy |
| title | A new approach to the estimation of surface free energy based on Vickers microhardness data |
| title_full | A new approach to the estimation of surface free energy based on Vickers microhardness data |
| title_fullStr | A new approach to the estimation of surface free energy based on Vickers microhardness data |
| title_full_unstemmed | A new approach to the estimation of surface free energy based on Vickers microhardness data |
| title_short | A new approach to the estimation of surface free energy based on Vickers microhardness data |
| title_sort | new approach to the estimation of surface free energy based on vickers microhardness data |
| topic | Material testing Vickers microhardness (MHV) surface free energy |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0000855&mi=cd |