Affiliation:
1. Laboratory for Manufacturing and Productivity, Massachusetts Institute of Technology, Cambridge, MA 02139
Abstract
The coefficients of thermal expansion (CTE) of La2O3, TaVO5 and Ta16W18O94 were measured in the temperature range 150–300 K for space applications. Hot pressed La2O3 showed a positive CTE of 8.6 × 10−6 K−1. Sintered TaVO5 had a positive and extraordinarily large CTE (50 × 10−6 K−1), but the CTE was negative (−4.0 × 10−6 K−1) in the temperature range 340–380 K. The thermal expansion data suggest a reversible phase transformation near 260 K. The CTE of hot pressed Ta16W18O94 was −1.52 × 10−6 K−1. Sintered Ta16W18O94 showed slight hysteresis, but the CTE was about −1.0 × 10−6 K−1.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Cited by
3 articles.
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