Low-temperature thermal expansion of A15 vanadium--gallium alloys

The thermal expansion of A15 V- Ga alloys relative to room temraperature was measured from near 4.2 to 300 deg K using a powder diffraction technique. The data were fitted to a polynomial function of temperature, from which the instantaneous coefficients of linear expansion were calculated. No unambiguous evidence for a low-temperature martensitic transformation was detected. (auth)