کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1480620 | 1510422 | 2015 | 6 صفحه PDF | دانلود رایگان |
• We measured the Young's modulus and the internal friction vs temperature of BMG.
• The softening rate of Young's modulus decreases with the increase of Zr.
• The amplitude of the E relaxation increases with the Zr concentration.
• The evolution of E during crystallization reveals two consecutive steps.
In this study, the Young's modulus (E) and the internal friction (Q− 1) of bulk metallic glasses ZrxCu(90 − x)Al10 for x = 45, 50, 55 and 60 were measured. Using a technique of resonant frequency and damping analysis, these parameters were measured in real time from room temperature up to 800 °C. Two kinds of thermal treatment were performed: i) below Tg over several days in order to analyze the annealing treatment; ii) above Tg with increasing temperature at a constant rate in order to characterize the crystallization process. The evolution of E is discussed and has revealed interesting information concerning the structure modification during thermal treatments. After the crystallization treatment, phase characterization measurements of the samples were performed using the X-ray diffraction technique. The crystallized phases and their influences on the evolution of the Young's modulus are discussed as a function of the Zr/Cu ratio.
Journal: Journal of Non-Crystalline Solids - Volume 421, 1 August 2015, Pages 35–40