Logarithmic temperature dependence of the sound velocity in amorphous metallic Ni-P
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چکیده
منابع مشابه
Logarithmic Temperature Dependence of the Sound Speed in Amorphous Silica at Low Temperatures
The tunneling model has enjoyed considerable success in describing the low temperature properties of glasses. However, departures from the tunneling model have been noted in experiments at very low temperatures (below 100 mK). We have measured the change in the sound speed V/V0 between 1 and 40 mK in an amorphous silica double paddle oscillator oscillating at 14 kHz. Most importantly, the sound...
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The sound speed ΔV/V0 of amorphous silica between 1 and 30 mK was measured using a double paddle oscillator, cut with a laser from a 0.4 mm thick plate of vitreous silica. The oscillator was operated at four of its resonant modes between 610 Hz and 14 kHz. Above 3 mK and up to the maximum of ΔV/V0, the sound speed exhibits the logarithmic temperature dependence predicted by the tunneling model ...
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Ni0.25Fe0.75Zr₃ metallic glassy ribbons were annealed in evacuated quartz ampoules beyond the crystallization temperatures (Tx ~655 K) over the range 773 to 1,173 K for varying periods of time. The resistivity of samples annealed over the temperature range 923 to 1,073 K for periods less than four hours increased as a function of decreasing temperature, while it decreased for samples annealed f...
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An anomaly in differential scanning calorimetry has been reported in a number of metallic glass materials in which a broad exothermal peak was observed between the glass and crystallization temperatures. The mystery surrounding this calorimetric anomaly is epitomized by four decades long studies of Pd-Ni-P metallic glasses, arguably the best glass-forming alloys. Here we show, using a suite of ...
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In the present work, the influence of aging temperature on mechanical properties and sound velocity of Maraging steel M350 was investigated. For this purpose, first, samples were solution annealed at 825◦C for 2 hours and then age hardened at 510◦C-600◦C for 3 hours. Hardness, tensile and impact tests were used for determining mechanical properties and longitudinal ultrasonic velocity was used ...
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ژورنال
عنوان ژورنال: Journal de Physique Lettres
سال: 1977
ISSN: 0302-072X
DOI: 10.1051/jphyslet:0197700380206500