2017 Fiscal Year Final Research Report
Development of thermophysical property measurements of nickel-based heat-resistant alloys and frontier of high-temperature liquid science
| Project/Area Number |
26249113
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Metal making/Resorce production engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Keywords | 熱物性 / 高温融体 / 密度 / 熱容量 / 熱伝導率 / 放射率 |
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| Outline of Final Research Achievements |
A numerical simulation is currently utilized for developing casting process of turbine blade materials used in high-efficiency fire plant and jet engine. Thermophysical properties are necessary for heat and mass flow modeling in the process. However, the thermophysical property data are scarce for high-temperature melts because of the experimental difficulties. In this study, we have developed a high-precision measurement system for thermophysical properties of Ni alloys. This system consists of an electromagnetic levitator incorporating a superconducting magnet. The density, heat capacity, thermal conductivity and emissivity of liquid Ni alloys were measured as a function of temperature and composition by using the system. Compositional dependence of density and heat capacity was discussed in comparison with an ideal solution model, and their excess properties were determined. The thermal conductivity was discussed with a free electron model, and contribution of phonon was confirmed.
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| Free Research Field |
高温材料プロセス
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