Understanding exceptional thermodynamic and kinetic stability of amorphous sulfur obtained by rapid compression

Yu, Peng; Wang, W. H.; Wang, R. J.; Lin, Shengxiong; Liu, X. R.; Hong, Shiming; Bai, H. Y.

doi:10.1063/1.3064125

Cited by 28 publications

(30 citation statements)

References 26 publications

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“…Pressure-induced rapid solidification from liquid provides an alternative way of preparing amorphous materials 13 . The amorphous sulfur thus obtained exhibited relatively high thermal stability 14 , 15 . At room temperature, it takes about 75 mins to start crystallization 14 .…”

Section: Introductionmentioning

confidence: 98%

“…At room temperature, it takes about 75 mins to start crystallization 14 . At 269 K in the fridge, above its glass transition temperature T g , the amorphous sulfur can be kept for over one month without any detectable crystallization 15 . In this letter, we investigated the structural evolution of amorphous sulfur from room temperature to post-λ-transition temperature by synchrotron high-energy X-ray diffraction, Raman spectroscopy and Differential Scanning Calorimetry (DSC).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Chain Breakage in the Supercooled Liquid - Liquid Transition and Re-entry of the λ-transition in Sulfur

Zhang

Ren

Liu

et al. 2018

Sci Rep

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Amorphous sulfur was prepared by rapid compression of liquid sulfur at temperatures above the λ-transition for to preserve the high-temperature liquid structure. We conducted synchrotron high-energy X-ray diffraction and Raman spectroscopy to diagnose the structural evolution of amorphous sulfur from room temperature to post-λ-transition temperature. Discontinuous changes of the first and second peaks in atomic pair-distribution-function, g(r), were observed during the transition from amorphous to liquid sulfur. The average first-neighbor coordination numbers showed an abrupt drop from 1.92 to 1.81. The evolution of the chain length clearly shows that the transition was accompanied by polymeric chains breaking. Furthermore, a re-entry of the λ-transition structure was involved in the heating process. The amorphous sulfur, which inherits the post-λ-transition structure from its parent melts, transformed to the pre-λ-transition liquid structure at around 391 K. Upon further heating, the pre-λ-transition liquid transformed to a post-λ-transition structure through the well-known λ-transition process. This discovery offers a new perspective on amorphous sulfur’s structural inheritance from its parent liquid and has implications for understanding the structure, evolution and properties of amorphous sulfur and its liquids.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Chain Breakage in the Supercooled Liquid - Liquid Transition and Re-entry of the λ-transition in Sulfur

Zhang

Ren

Liu

et al. 2018

Sci Rep

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“…For instance, Hong et al found that RC process could induce two amorphous phases of poly (ethylene terephthalate) (PET) which were different from that in quenched samples. Yu et al reported that the glassy sulfur obtained by RC process exhibited an exceptional thermodynamic and kinetic stability, and Yuan et al reported that the glassy polyether‐ether‐ketone samples prepared by RC exhibited high thermodynamic stability, excellent friction, and considerable stiffness in contrast to that prepared by quench cooling. In fact, it is increasingly believed that the glassy sample is in local‐ordered state with chain aggregation instead of perfectly amorphous state, and this local structure can exist while still providing a random large‐scale chain configuration .…”

Section: Introductionmentioning

confidence: 99%

Cold crystallization behavior of glassy poly(lactic acid) prepared by rapid compression

Zhang

Shao

et al. 2014

Polym Eng Sci

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The cold crystallization behavior of glassy poly(lactic acid) was studied by comparison among samples obtained through three different treatments, which are naturally cooling (NC), liquid nitrogen quenching (NQ), and rapidly compressing (RC). The crystallization kinetics and structural changes of these glassy samples were analyzed by using in situ Fourier transform infrared (FTIR) and in situ wide angle X-ray diffraction measurements. The results reveal that, the cold crystallization behavior is very similar between NC and NQ samples, but RC sample exhibits higher crystallization rate and lower crystallization temperature than them. FTIR investigation showed that, during the heating process for all the glassy samples, conformational adjustment in the amorphous phase occurs first, and followed by formation of the disordered crystals and then the disordered crystals further perfecting, while for RC sample the onset temperature of each step is much lower. Furthermore, for RC sample, the crystal grain number is larger and its initial a 0 form crystal induced by the heating is higher ordered than that of the others, and this unique crystallization behavior might be caused by the local ordered domains formed during the RC process. POLYM. ENG. SCI., 55:359-366, 2015. FIG. 6. Temperature dependence of the FTIR spectra in the 835-980 cm 21 range and the intensity change of indicated bands with temperature during cold crystallization.

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“…Nanocrystallization is a process which is opposite to the amorphization. If one applies SPD to the initially amorphous sample, one can observe that the small nanocrystals start to appear [104][105][106][107][108][109][110][111][112]. Obviously, the nanocrystallization and amorphization are also coupled and competing processes like precipitation/dissolution (see Section 3 above).…”

Section: Steady-state During Spdmentioning

confidence: 99%

Diffusive and Displacive Phase Transformations Under High Pressure Torsion

Straumal

Kilmametov

Мазилкин

et al. 2019

Acta Metall Slovaca

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<p class="AMSmaintext"><span lang="EN-GB">Severe plastic deformation (SPD) can induce various phase transformations. After a certain strain, the dynamic equilibrium establishes between defects production by an external force and their relaxation (annihilation). The grain size, hardness, phase composition etc. in this steady-state does not depend on the initial state of a material and is, therefore, equifinal. In this review we discuss the competition between precipitation and dissolution of precipitates, amorphization and (nano)crystallization, SPD-induced accelerated mass-transfer, allotropic and martensitic transitions and formation of grain boundary phases.</span></p>

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Understanding exceptional thermodynamic and kinetic stability of amorphous sulfur obtained by rapid compression

Cited by 28 publications

References 26 publications

Chain Breakage in the Supercooled Liquid - Liquid Transition and Re-entry of the λ-transition in Sulfur

Chain Breakage in the Supercooled Liquid - Liquid Transition and Re-entry of the λ-transition in Sulfur

Cold crystallization behavior of glassy poly(lactic acid) prepared by rapid compression

Diffusive and Displacive Phase Transformations Under High Pressure Torsion

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