Thermophysical Properties of Rh3X for Ultra-High Temperature Applications: THERMAL CONDUCTIVITY AND THERMAL EXPANSION OF L12 INTERMETALLIC COMPOUNDS OF RHODIUM WITH TITANIUM, ZIRCONIUM, HAFNIUM, VANADIUM, NIOBIUM AND TANTALUM

By Yoshihiro Terada; Kenji Ohkubo; Seiji Miura; Mohri Tetsuo

doi:10.1595/147106706X106182

ISSN: 0032-1400

oa Thermophysical Properties of Rh3X for Ultra-High Temperature Applications

THERMAL CONDUCTIVITY AND THERMAL EXPANSION OF L12 INTERMETALLIC COMPOUNDS OF RHODIUM WITH TITANIUM, ZIRCONIUM, HAFNIUM, VANADIUM, NIOBIUM AND TANTALUM
Authors: By Yoshihiro Terada¹, Kenji Ohkubo¹, Seiji Miura¹ and Mohri Tetsuo¹
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Affiliations: ¹ Department of Metallurgy and Ceramics Science, Tokyo Institute of TechnologyMeguro-ku, Tokyo 152-8552Japan ² Division of Materials Science and Engineering, Graduate School of Engineering, Hokkaido UniversitySapporo 060-8628Japan
Source: Platinum Metals Review, Volume 50, Issue 2, Apr 2006, p. 69 - 76
DOI: https://doi.org/10.1595/147106706X106182
- Published online: 01 Jan 2006

Abstract

Thermal conductivity and thermal expansion were measured for the L12 intermetallic compounds Rh3 X (X = Ti, Zr, Hf, V, Nb, Ta) in the temperature range 300–1100 K to evaluate the feasibility of applying the compounds as ultra-high temperature structural materials. The thermal conductivities of Rh3X are widely distributed over the range 32–103 W m^–1 K ^–1 at 300 K, but the differences between the thermal conductivities diminish at higher temperatures. A trend is observed in that the thermal conductivity of Rh3 X is greater if the constituent X belongs to Group 5 rather than to Group 4 in the Periodic Table. The coefficient of thermal expansion (CTE) values of Rh3X increase slightly with increasing temperature; values are concentrated around 10 × 10^–6 K^–1 at 800 K. CTE values of Rh3X decrease as X appears lower in the Periodic Table. It is demonstrated that Rh3Nb and Rh3Ta are suitable for ultra-high temperature structural applications due to their higher thermal conductivities and smaller CTE values.

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Thermophysical Properties of Rh3X for Ultra-High Temperature Applications

Platinum Metals Review 50, 69 (2006); https://doi.org/10.1595/147106706X106182

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oa Thermophysical Properties of Rh3X for Ultra-High Temperature Applications

THERMAL CONDUCTIVITY AND THERMAL EXPANSION OF L12 INTERMETALLIC COMPOUNDS OF RHODIUM WITH TITANIUM, ZIRCONIUM, HAFNIUM, VANADIUM, NIOBIUM AND TANTALUM

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