ZiQi Zhao, MingYang Xu, ChaoYang Sun, PeiPei Li^*

The International Conference on Computational & Experimental Engineering and Sciences, Vol.33, No.3, pp. 1-1, 2025, DOI:10.32604/icces.2025.012382

Abstract Hot isostatic pressing (HIP) is often utilized to obtain laser powder bed fused (LPBF) Ti-6Al-4V with good mechanical properties. To uncover the underlying mechanisms by which HIP improves the mechanical properties, several mechanisms are considered and examined against experimental data sets available in the literature. The results suggest that HIP improves mechanical properties by both reducing defect sizes below a critical threshold and altering the microstructure surrounding defects. Based on these findings, a pore healing model was developed, and optimized HIP processing parameter range (temperature, pressure, and soaking time) were proposed. Severe plastic deformation driven… More >

Dan Xu^1,2, Chuanfu Luo^1,2,3,*

CMC-Computers, Materials & Continua, Vol.85, No.2, pp. 2807-2818, 2025, DOI:10.32604/cmc.2025.069471 - 23 September 2025

Abstract The crystallization behavior of polymers is significantly influenced by molecular chain length and the dispersion of varying chain lengths. The complexity of studying crystallization arises from the dispersity of polymer materials and the typically slow cooling rates. Recent advancements in fast cooling techniques have rendered the investigation of polymer crystallization at varying cooling rates an attractive area of research; however, a systematic quantitative framework for this process is still lacking. We employ a coarse-grained model for polyvinyl alcohol (CG-PVA) in molecular dynamics simulations to study the crystallization of linear polymers with varying chain lengths under… More >

Yu. S. Hordieiev^*, A. V. Zaichuk

Chalcogenide Letters, Vol.21, No.3, pp. 243-253, 2024, DOI:10.15251/CL.2024.213.243

Abstract The glass composition (70-x)PbO–(30-y)B₂O₃–(x+y)AlF3, where x and y ranges from 0 to 20 mol%, were prepared using the conventional melt-quenching-annealing technique. The structural and thermal properties of the glasses were comprehensively analyzed using techniques like Differential Thermal Analysis (DTA), Dilatometry, Fourier-Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), and Scanning Electron Microscopy (SEM). XRD confirmed the amorphous, non-crystalline structure of the glasses. The glass network was found to be composed of structural units such as PbO₄, BO₄, BO₃ and AlO₆ using FTIR spectroscopy. FTIR analysis revealed significant structural changes, including the transformation of BO₄ to BO₃ units and the increase… More >

K. I. Hussain^a, A. Ashour^b, E. S. Yousef^c, E. R. Shaaban^b,d,*

Chalcogenide Letters, Vol.21, No.1, pp. 65-80, 2024, DOI:10.15251/CL.2024.211.65

Abstract The present work has examined the thermal features of glassy chacogenide materials Se0.75-xTe0.25Agx (x = 0, 2, 4, 6, 8, 10 at %). The thermal stability of these compositions has been assessed under non-isothermal conditions using Differential Scanning Calorimetry (DSC), which has been used to find the glass transition temperature (Tg), the initial crystallization temperature (Tin), the temperature corresponding to the top of the crystallization rate (Tp), and the melting temperature (Tm). In addition, the kinetic parameter Kr(T) was given as an additional sign of thermal stability. Among these compositions, it was discovered that Se0.71Te0.25Ag0.04… More >

R. Vigi^a, G. R. Štrbac^a, D. D. Štrbac^b,*, O. Bošák^c, M. Kubliha^c

Chalcogenide Letters, Vol.21, No.1, pp. 21-37, 2024, DOI:10.15251/CL.2024.211.21

Abstract The processes of glass-transition and crystallization of chalcogenide glass As₄₀Se₃₀Te₃₀ with 5 at.% silver were analyzed using differential scanning calorimetry. The values of glass-transition temperatures and activation energy were determined. Two crystallization processes were also detected and three-dimensional growth. Using non-isoconversional models the activation energies for both processes amounted to 112(2) kJ/mol and 97(2) kJ/mol. Isoconversional models were used to track changes in activation energy. The presence of Te significantly affects the thermal parameters as well as the structure of the glass while the presence of Ag does not significantly change the degree of connectivity of More >

S. U. Atayeva^a,b, A. I. Isayev^a, S. I. Mekhtiyeva^a, S. N. Garibova^a,c,*, R. I. Alekberov^a,d, F. N. Mammadov^e

Chalcogenide Letters, Vol.21, No.4, pp. 355-363, 2024, DOI:10.15251/CL.2024.214.355

Abstract The study is dedicated to the investigation of thermo-physical characteristics of Se₉₅Te₅ chalcogenide glassy semiconductor during its glass formation and crystallization processes, employing various scanning rates of 5, 10, 15 and 20 K/min in non-isothermal modes through DSC measurement. Analysis of the structural relaxation kinetics involves the Kissinger’s, Augis and Bennett's, as well as Matusita’s approaches. Experimental data yield contains the determination of crucial parameters such as glass transition (T_g), crystallization(T_c), and melting temperatures alongside factors like reduced temperature of glass transition (T_rg), Hruby’s parameter (K_gl), fragility index (F_i), Avrami exponents (n, m), glass transition (140.24 kJ/mol) and More >

L. Bouras^a, A. Beggas^a,*, D. Sahnoune^b, M. Ghougali^a, R. Ferhat^a

Chalcogenide Letters, Vol.21, No.11, pp. 917-926, 2024, DOI:10.15251/CL.2024.2111.917

Abstract The present study intends to provide the impact of nitric acid on the structural and optical characteristics of thin films of ZnO. The latter was grown on substrates of glass via spray pyrolysis with 400°C, using Zinc acetate aqueous solution acidified by different amounts of nitric acid to obtain a pH ranging from 6.8 to 2.9. The film properties were analyzed as a function of pH. In the light of the XRD analysis, all the films have a preferential direction along the (002) plane. Depending on pH conditions, the crystal size increased from 32.38 to More >

Zhengyang Zhang^#, Weixue Liu^#, Yinran Huang^*, Ping Li^*

Phyton-International Journal of Experimental Botany, Vol.93, No.6, pp. 1263-1274, 2024, DOI:10.32604/phyton.2024.050755 - 27 June 2024

Abstract Plant antifreeze proteins (AFPs) are special proteins that can protect plant cells from ice crystal damage in low-temperature environments, and they play a crucial role in the process of plants adapting to cold environments. Proteins with these characteristics have been found in fish living in cold regions, as well as many plants and insects. Although research on plant AFPs started relatively late, their application prospects are broad, leading to the attention of many researchers to the isolation, cloning, and genetic improvement of plant AFP genes. Studies have found that the distribution of AFPs in different species… More >

Ruiqiong Wang¹, Tiantian Du², Jinchen Cao^2,*, Guoqiang Wang³

Frontiers in Heat and Mass Transfer, Vol.22, No.1, pp. 129-139, 2024, DOI:10.32604/fhmt.2024.047825 - 21 March 2024

Abstract With the advancement of oilfield extraction technology, since oil-water emulsions in waxy crude oil are prone to be deposited on the pipe wall, increasing the difficulty of crude oil extraction. In this paper, the mesoscopic dissipative particle dynamics method is used to study the mechanism of the crystallization and deposition adsorbed on the wall. The results show that in the absence of water molecules, the paraffin molecules near the substrate are deposited on the metallic surface with a horizontal morphology, while the paraffin molecules close to the fluid side are arranged in a vertical column More >

Chunlei Ruan^1,2,*, Cengceng Dong¹, Kunfeng Liang³, Zhijun Liu¹, Xinru Bao¹

CMES-Computer Modeling in Engineering & Sciences, Vol.138, No.3, pp. 3033-3049, 2024, DOI:10.32604/cmes.2023.030607 - 15 December 2023

Abstract Using Euler’s first-order explicit (EE) method and the peridynamic differential operator (PDDO) to discretize the time and internal crystal-size derivatives, respectively, the Euler’s first-order explicit method–peridynamic differential operator (EE–PDDO) was obtained for solving the one-dimensional population balance equation in crystallization. Four different conditions during crystallization were studied: size-independent growth, size-dependent growth in a batch process, nucleation and size-independent growth, and nucleation and size-dependent growth in a continuous process. The high accuracy of the EE–PDDO method was confirmed by comparing it with the numerical results obtained using the second-order upwind and HR-van methods. The method is More > Graphic Abstract