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- 저자 : Hui Xin Che (검색결과 2 건)
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Miao Cao,Hui‑Qin Chen,Kun‐Kun Deng,Xing‑Wang Duan,Shuang Liu,Xin Che,Fei Li 대한금속·재료학회 2023 METALS AND MATERIALS International Vol.29 No.5
Ti/Al multilayered composites (LMCs) with 3-layers, 5-layers and 7-layers were prepared by hot‐pressing and hot‐rolling. Theeffects of the interface on the mechanical properties and stamping formability of LMCs were revealed. The results indicatethat the TiAl3phases at the interface thicken gradually with the increase of layers. As the layers of LMCs increases, boththe grain size and the basal texture strength of Ti decrease, and Ti possesses a higher Schmid factors (SF) and more uniformSF distribution, which promotes the overall coordinated deformation of LMCs. The elongation (EL) of LMCs graduallyincreases at the expense of the strength with the increase of layers. The stress–strain transfer across the interface, the releaseof residual stress through interfacial microcracks, and the improvement of the interfacial metallurgical bonding strengthare all conducive to the coordinated deformation between Ti and Al layers, thus the strength of LMCs decreases and theEL enhances. Both the yield strength ratio (σs/σb) and plastic strain ratio (r) decrease, while the strain-hardening exponent(n) increases with the increase of layers of LMCs, which are beneficial to improve the stamping formability of LMCs. Thenumber of interface increases with the increase of layers, which hinders crack propagation. Moreover, the microcracks areeasily induced by the brittle TiAl3phase at the interface, and the main cracks deflect obviously and release part energy inthe form of secondary microcracks, thus delaying the failure of LMCs and improving their stamping formability.
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Vin Cent Tai,Hui Xin Che,Xin Ying Kong,Kah Chun Ho,Wei Ming Ng 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.127 No.-
Over the past decade, incessant research efforts have been devoted to the development of iron oxidenanoparticles (IONPs) for wastewater industry. Past research has witnessed the potential of non-toxicand abundant IONPs to serve as powerful nanosorbents and nanocatalysts, which has become an innovativeresearch point to provide adequate, safe, sustainable, and affordable wastewater treatment for preservingthe environment. To improve the efficiency of wastewater treatment process, worldwideresearchers have made substantial efforts in tuning the size, morphology, chemical composition, and surfacechemistry of IONPs. This review provides an up-to-date overview of the synthesis strategies, limitationsand transformation of IONPs for wastewater treatment. Special mentions on the varioustransformations of IONPs such as functionalization, homogenous-heterogenous catalyst, multifunctionalcatalyst, and green synthesis routes of IONPs. Finally, the constraints that hinder the real-life applicationsof IONPs, including the challenges in the development of IONPs with ideal properties, the long-term stabilitythat allows their repeated usage in wastewater treatment, and understanding their potential environmentalimpacts are outlined. Future research should focus on developing highly efficient andenvironmental friendly synthesis approaches, optimizing the stability and reusability of IONPs, and conductingthorough assessments of their potential environmental impacts to fully realize the potential ofIONPs in the wastewater industry.
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