Multilayer coating effects on the thermal conductivity of tools using an electric furnace technique**
This paper demonstrates the effects of multilayer coatings on the thermal conductivity of tool specimens. The experiments were conducted using copper specimens and four tool specimens with different coatings (uncoated, TiN, TiN/TiCN, and TiN/Al2O3/TiCN). An electrical furnace technique was used with...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2021-12-01
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| Series: | Journal of the Mechanical Behavior of Materials |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/jmbm-2021-0031 |
| Summary: | This paper demonstrates the effects of multilayer coatings on the thermal conductivity of tool specimens. The experiments were conducted using copper specimens and four tool specimens with different coatings (uncoated, TiN, TiN/TiCN, and TiN/Al2O3/TiCN). An electrical furnace technique was used with the specimens isolated from their surroundings and temperatures measured at the contact surfaces. The specimens are joined securely, with a thermal insulator (glass wool) placed around them so that the heat flow is in the axial direction only. One surface of the copper specimen faces the heat source, and the opposite end of the tool specimen is exposed to room temperature. The experimental results displayed variations in the temperature distribution due to the effect of the coatings, and thermal conductivities were measured at temperatures ranging from 100°C to 300°C. The results indicated the optimum coating for tools (lowest thermal conductivity) of the four types is TiN/Al2O3/TiCN. |
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| ISSN: | 0334-8938 2191-0243 |