Thermal conductivity and thermal diffusivity coefficients of 12Kh18N10T stainless steel in a wide temperature range

2008 ◽  
Vol 46 (5) ◽  
pp. 731-733 ◽  
Author(s):  
S. V. Stankus ◽  
I. V. Savchenko ◽  
A. V. Baginskii ◽  
O. I. Verba ◽  
A. M. Prokop’ev ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Stainless Steel ◽  
Thermal Diffusivity ◽  
Wide Temperature Range ◽  
Temperature Range

scholarly journals Phonon hydrodynamics and ultrahigh–room-temperature thermal conductivity in thin graphite

Science ◽  
2020 ◽  
Vol 367 (6475) ◽  
pp. 309-312 ◽  
Author(s):  
Yo Machida ◽  
Nayuta Matsumoto ◽  
Takayuki Isono ◽  
Kamran Behnia
Keyword(s):  
Thermal Conductivity ◽  
Thermal Diffusivity ◽  
Wide Temperature Range ◽  
Room Temperature ◽  
Phonon Dispersion ◽  
High Conductivity ◽  
Temperature Range ◽  
A Value ◽  
Out Of Plane ◽  
Intimate Link

Allotropes of carbon, such as diamond and graphene, are among the best conductors of heat. We monitored the evolution of thermal conductivity in thin graphite as a function of temperature and thickness and found an intimate link between high conductivity, thickness, and phonon hydrodynamics. The room-temperature in-plane thermal conductivity of 8.5-micrometer-thick graphite was 4300 watts per meter-kelvin—a value well above that for diamond and slightly larger than in isotopically purified graphene. Warming enhances thermal diffusivity across a wide temperature range, supporting partially hydrodynamic phonon flow. The enhancement of thermal conductivity that we observed with decreasing thickness points to a correlation between the out-of-plane momentum of phonons and the fraction of momentum-relaxing collisions. We argue that this is due to the extreme phonon dispersion anisotropy in graphite.

scholarly journals Рассеяние фононов на парамагнитных ионах европия и самария в феррите висмута

2020 ◽  
Vol 62 (7) ◽  
pp. 1137
Author(s):  
Р.Г. Митаров ◽  
С.Н. Каллаев ◽  
А.М. Бакмаев ◽  
С.А. Резниченко ◽  
А.Т. Темиров
Keyword(s):  
Thermal Conductivity ◽  
Rare Earth ◽  
Thermal Diffusivity ◽  
Temperature Dependence ◽  
Wide Temperature Range ◽  
Bismuth Ferrite ◽  
Resonance Scattering ◽  
Phonon Thermal Conductivity ◽  
Temperature Range ◽  
The Rare Earth

The temperature dependence of the thermal diffusivity and thermal conductivity of the multiferroics BiFeO3, Bi0.90Sm0.10FeO3 and Bi0.90Еu0.10FeO3 is studied. It was found that the substitution of bismuth ions by the rare-earth europium and samarium ions in bismuth ferrite leads to a decrease in phonon thermal conductivity in a wide temperature range. It was established that the decrease in the thermal conductivity of bismuth ferrite is due to resonance scattering of phonons at paramagnetic levels of europium and samarium ions.

Highly thermal conductive resins formed from wide-temperature-range eutectic mixtures of liquid crystalline epoxies bearing diglycidyl moieties at the side positions

2017 ◽  
Vol 8 (18) ◽  
pp. 2806-2814 ◽  
Author(s):  
Youngsu Kim ◽  
Hyeonuk Yeo ◽  
Nam-Ho You ◽  
Se Gyu Jang ◽  
Seokhoon Ahn ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Wide Temperature Range ◽  
Epoxy Resins ◽  
Liquid Crystalline ◽  
High Thermal Conductivity ◽  
Temperature Range ◽  
Eutectic Mixtures ◽  
Liquid Crystalline Epoxy ◽  
Conductive Resins

Liquid crystalline epoxy resins with a wide temperature range exhibit a high thermal conductivity of 0.4 W m−1 K−1.

scholarly journals Thermal diffusivity of corrosion-resistant coating SDP-1

2021 ◽  
Vol 2119 (1) ◽  
pp. 012145
Author(s):  
A Sh Agazhanov ◽  
D A Samoshkin ◽  
S V Stankus
Keyword(s):  
Thermal Diffusivity ◽  
Wide Temperature Range ◽  
Laser Flash ◽  
Flash Method ◽  
Corrosion Resistant ◽  
Practical Applications ◽  
Temperature Range ◽  
Resistant Coating ◽  
Heat Resistant Coating ◽  
Corrosion Resistant Coating

Abstract In the present work, the thermal diffusivity of the SDP-1 grade nickel alloy was investigated in the wide temperature range of 300-1476 K. The SDP-1 alloy (Ni-Co-Cr-Al-Y) is the heat-resistant coating for blades of gas turbine plants, providing protection against sulfide-oxide corrosion in the temperature range of 1070-1220 K. The measurements were performed by laser flash method using LFA-427 apparatus. The estimated errors of the obtained data were 2-5% depending on temperature. The thermal diffusivity approximation equations and a table of reference values for various scientific and practical applications were obtained.

Thermal Diffusivity of 16Kh12V2FTaR Steel in a Wide Temperature Range

2013 ◽  
Vol 8 (3) ◽  
pp. 163-167
Author(s):  
Alibek Agazhanov ◽  
Igor Savchenko ◽  
Dmitriy Samoshkin ◽  
Sergey Stankus ◽  
Olga Dutova
Keyword(s):  
Phase Transitions ◽  
Thermal Diffusivity ◽  
Wide Temperature Range ◽  
Curie Point ◽  
Martensitic Steel ◽  
Laser Flash ◽  
Austenite Phase ◽  
Laser Flash Method ◽  
Flash Method ◽  
Temperature Range

Thermal diffusivity of the ferritic-martensitic steel 16Kh12V2FTaR in the temperature range from 296 to 1274 K has been measured by the laser flash method with the error of 2–4 %. The approximating equations have been obtained, the Curie point of steel and the temperatures of martensitic-austenite phase transitions have been determined

scholarly journals Thermophysical properties of BiFeO3/REE multiferroics in a wide temperature range

2020 ◽  
Vol 10 (01n02) ◽  
pp. 2060019
Author(s):  
Sidek Khasbulatov ◽  
Suleiman Kallaev ◽  
Haji Gadjiev ◽  
Zairbek Omarov ◽  
Abumuslim Bakmaev ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Heat Capacity ◽  
Rare Earth ◽  
High Temperature ◽  
Thermal Diffusivity ◽  
Rare Earth Elements ◽  
Wide Temperature Range ◽  
Thermophysical Properties ◽  
Multiferroic Bifeo ◽  
Comprehensive Study

The paper presents the results of a comprehensive study of the thermophysical properties (thermal conductivity, thermal diffusivity, heat capacity) of high-temperature multiferroic BiFeO3 modified with rare-earth elements (REEs) (La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Lu). The regularities of the formation of the mentioned characteristics were established. The assumptions about the nature of the observed phenomena were suggested.

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