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Thermophysical Properties of L1
2
Intermetallic Compounds of Iridium
Thermal conductivity and thermal expansion for the intermetallic compounds Ir
3
X (X = Ti, Zr, Hf, V, Nb or Ta) were measured in the temperature range between 300 and 1100 K. The thermal conductivities of Ir
3
X are distributed in the range from 41
to 99 W m
‐1
K
‐1
at 300 K, while the difference of thermal conductivities becomes less emphasised at higher temperatures. The coefficient of thermal expansion (CTE) values of Ir
3
X are insensitive to temperature,
and fall around 8 × 10
‐6
K
‐1
at 800 K. The Ir
3
X intermetallic compounds with X = Ti, Zr, Hf, Nb or Ta are suitable for ultra high-temperature structural applications due to their higher thermal conductivities
and smaller CTE values.
33 References.
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Document Type: Research Article
Publication date: October 1, 2008
Johnson Matthey's journal of research on the platinum group metals and developments in their application in industry from 1957-2014. It has now been renamed the Johnson Matthey Technology Review
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