Zobrazeno 1 - 10
of 233
pro vyhledávání: '"Qiao, J C"'
We performed parallel measurements of the high-frequency shear modulus $G$ and relative volume $\Delta V/V$ for high-entropy Ti$_{20}$Zr$_{20}$Hf$_{20}$Be$_{20}$Cu$_{20}$ and Ti$_{20}$Zr$_{20}$Hf$_{20}$Be$_{20}$Ni$_{20}$ glasses upon heating from roo
Externí odkaz:
http://arxiv.org/abs/2408.03207
We performed high-frequency (0.4 to 1.7 MHz) measurements of the internal friction (IF) on 14 bulk metallic glasses (MGs). It is found that 12 of these MGs display relaxation IF peaks at temperatures T= 400-500 K, which are weakly affected by heat tr
Externí odkaz:
http://arxiv.org/abs/2404.17948
Autor:
Afonin, G. V., Qiao, J. C., Makarov, A. S., Konchakov, R. A., Goncharova, E. V., Kobelev, N. P., Khonik, V. A.
We performed calorimetric measurements on 30 bulk metallic glasses differing with their mixing entropies DSmix. On this basis, the excess entropies DS and excess enthalpies DH of glasses with respect to their maternal crystalline states are calculate
Externí odkaz:
http://arxiv.org/abs/2403.20115
We measured the shear viscosity of 14 metallic glasses differing with their mixing entropy $\Delta S_{mix}$. It is found that the viscosity at the glass transition temperature $T_g$ significantly increases with $\Delta S_{mix}$. Using calorimetric da
Externí odkaz:
http://arxiv.org/abs/2311.11263
Autor:
Makarov, A. S., Afonin, G. V., Konchakov, R. A., Khonik, V. A., Qiao, J. C., Vasiliev, A. N., Kobelev, N. P.
Using a notion on the excess entropy of glass with respect to the counterpart crystal, we introduce a simple dimensionless order parameter $\xi$, which changes from $\xi \rightarrow 0$ to $\xi \rightarrow 1$. The former case corresponds to a strongly
Externí odkaz:
http://arxiv.org/abs/2308.01660
Autor:
Konchakov, R. A., Makarov, A. S., Afonin, G. V., Qiao, J. C., Vasin, M. G., Kobelev, N. P., Khonik, V. A.
The high-frequency shear modulus of five Zr-, Pd-, Cu-based conventional and two high-entropy bulk metallic glasses was measured in a wide temperature range up to the beginning of crystallization. Using these data and general thermodynamic relations,
Externí odkaz:
http://arxiv.org/abs/2306.00475
Autor:
Makarov, A. S., Afonin, G. V., Konchakov, R. A., Qiao, J. C., Vasiliev, A. N., Kobelev, N. P., Khonik, V. A.
On the basis of shear modulus measurements on a Pt-based glass, we calculated temperature dependence of the defect concentration c using the Interstitialcy theory. This temperature dependence is compared with temperature dependence of the normalized
Externí odkaz:
http://arxiv.org/abs/2305.17036
Autor:
He, Q. F., Wang, J. G., Chen, H. A., Ding, Z. Y., Zhou, Z. Q., Xiong, L. H., Luan, J. H., Pelletier, J. M., Qiao, J. C., Wang, Q., Fan, L. L., Ren, Y., Zeng, Q. S., Liu, C. T., Pao, C. W., Srolovitz, D. J., Yang, Y.
Conventional crystalline alloys usually possess a low atomic size difference in order to stabilize its crystalline structure. However, in this article, we report a single phase chemically complex alloy which possesses a large atomic size misfit usual
Externí odkaz:
http://arxiv.org/abs/2101.02382
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