Elastic Constants of Yttrium Single Crystals in the Temperature Range 4.2–400°K

Journal Article · Fri Jan 01 04:00:00 EST 1960 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.1735657· OSTI ID:4169399

Smith, J F; Gjevre, J A

The five independent elastic constants for yttrium single crystals have been determined by the pulse-echo technique over the temperature range, 4.2--400°K. The experimental values extrapolated to 0° K are: C₁₁ = 8.34 plus or minus 0.02, C₃₃ = 8.01 plus or minus 0.02, C₄₄ = 2.690 plus or minus 0.006, C₁₂ = 2.91 plus or minus 0.03, and C₁₃ = 1.9 plus or minus 0.4 in units of 10¹¹ d/cm². The degree of elastic anisotropy is low throughout the entire temperature range. The curves illustrating the temperature dependence of the elastic constants show several inflections, and the curve for C₁₁ crosses that for C₃₃ near 390°K. The behavior is somewhat unusual, and is probably explicable on the basis that the degree of band overlap in yttrium is quite sensitive to interatomic spacing. Such a sensitivity has previously been postulated to explain the temperature dependence of the Rall coefficient.

• Research Organization: Iowa State Univ. of Science and Tech., Ames
• Sponsoring Organization: USDOE
• NSA Number: NSA-14-012963
• OSTI ID: 4169399
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 4 Vol. 31; ISSN JAPIAU; ISSN 0021-8979
• Publisher: American Institute of Physics (AIP)
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
ATOMIC MODELS
DIAGRAMS
ELASTICITY
HALL EFFECT
LOW TEMPERATURE
MONOCRYSTALS
PULSE ANALYZERS
QUANTITATIVE ANALYSIS
TEMPERATURE
YTTRIUM