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The Effect of Nb and W Alloying Additions to the Thermal Expansion Anisotropy and Elastic Properties of Mo^sub 5^Si^sub 3^
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Metallurgical and Materials Transactions
- Article date:
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March 1, 2005
- Author:
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Copyright informationCopyright Minerals, Metals & Materials Society Mar 2005. Provided by ProQuest LLC. (Hide copyright information)
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The directional thermal expansion and elastic properties of Mo^sub 5^Si^sub 3^, (Mo^sub 0.8^Nb^sub 0.2^)^sub 5^Si^sub 3^, and (Mo^sub 0.85^W^sub 0.15^)^sub 5^Si^sub 3^ have been studied as a function of temperature through the use of single crystals. Thermal expansion anisotropy was reduced by Nb and W alloying. The decrease in thermal expansion anisotropy by Nb alloying was only found to occur at low temperatures, and thermal expansion anisotropy of (Mo^sub 0.8^Nb^sub 0.2^)^sub 5^Si^sub 3^ was similar to that for the other two compounds at 800 °C. Values for the polycrystalline Young's, bulk, and shear moduli calculated from the measured single-crystal elastic constants are reduced by Nb ...
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