STUDY ON CYCLIC THERMODURABILITY OF CARBON MATERIALS
The thermodurability of glass carbon — one of the most promising carbon materials used in the production of lum inophors and semico nductor materials, optical single crystals, etc. — is investigated. The aim of this work was to study the behavior of glass carbon in the course of the thermal - cycle...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | Russian |
| Published: |
Don State Technical University
2014-03-01
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| Series: | Advanced Engineering Research |
| Subjects: | |
| Online Access: | https://www.vestnik-donstu.ru/jour/article/view/296 |
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| Summary: | The thermodurability of glass carbon — one of the most promising carbon materials used in the production of lum inophors and semico nductor materials, optical single crystals, etc. — is investigated. The aim of this work was to study the behavior of glass carbon in the course of the thermal - cycle testing. As a diagnostic technique of the m icroflow initiation and progress, the signal re ception of acoustic emission was used. It is shown that a heavy disloc ation motion on the thermal - cycle exposure recognized in the acoustic emission signals is observed in the glass carbon samples when heated. As far as the number of impulses is higher whe n heated than on cooling of the sa mple, it implies the damage accumulation in the structure under the thermal - cyclic handling of the glass carbon sa mples. It is found that damage acc u mulation curves reflected by the acoustic emission pulses differ on the s tage of heating and cooling. It is proposed to use a total curve of the acoustic emission pulses as a potent ial destruction sign of a glass - carbon product when heated. |
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| ISSN: | 2687-1653 |