Materials Transactions最新文献_第5页

Photodegradation under Ultraviolet Light Irradiation of RhB by ZnO–ZnCr2O4/g-C3N4 Nanocomposites Fabricated by Urea Combustion Method 紫外光照射下ZnO-ZnCr2 o>4/g-C3N4尿素燃烧法制备纳米复合材料

4区材料科学

Materials Transactions Pub Date : 2023-10-01 DOI: 10.2320/matertrans.mt-mh2022009

Chung-Lun Yu, Subramanian Sakthinathan, Chia-Cheng Lin, Yi-Hsuan Lee, Te-Wei Chiu

{"title":"Photodegradation under Ultraviolet Light Irradiation of RhB by ZnO–ZnCr2O4/g-C3N4 Nanocomposites Fabricated by Urea Combustion Method","authors":"Chung-Lun Yu, Subramanian Sakthinathan, Chia-Cheng Lin, Yi-Hsuan Lee, Te-Wei Chiu","doi":"10.2320/matertrans.mt-mh2022009","DOIUrl":"https://doi.org/10.2320/matertrans.mt-mh2022009","url":null,"abstract":"Due to the rapid national development of various countries, organic dyes have been applied in manufacturing products such as leather, textiles, paper, and cosmetics. However, the wastewater produced by these industries is harmful to the environment and organisms. Moreover, organic dyes contain toxic carcinogens and cause the reduction of the oxygen content in water, which is harmful to nature and the water resources people use. Photodegradation is a low-cost, highly efficient, and low-energy way to remove these substances. Zinc-based materials were applied as a degradation catalyst in this study. ZnO–ZnCr2O4/g-C3N4 nanocomposites were fabricated by the urea combustion method and used as photocatalysts for rhodamine B (RhB) degradation under ultraviolet A (UVA) light irradiation. ZnO–ZnCr2O4/g-C3N4 was investigated by XRD, FESEM, BET, UV-Vis, and TEM to confirm the crystalline microstructure. Based on the various annealing temperatures of ZnO–ZnCr2O4/g-C3N4 nanocomposite, the specific surface area varied from 36.33 m2/g to 107.55 m2/g. In addition, the photocatalytic activities of ZnO–ZnCr2O4/g-C3N4 nanocrystals were investigated through the degradation of RhB under UV light for 12 hours. After 12 hours, 95.45% of the RhB was degraded under UV light irradiation. ZnO–ZnCr2O4/g-C3N4 nanocomposites annealed at 500°C exhibited the highest rate constant, up to 6.11 × 10−3 min−1, and ZnO–ZnCr2O4/g-C3N4 revealed excellent stability based on the results of the cyclic test.","PeriodicalId":18402,"journal":{"name":"Materials Transactions","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135323368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Implementation of Atomic Stress Calculations with Artificial Neural Network Potentials 用人工神经网络电位实现原子应力计算

4区材料科学

Materials Transactions Pub Date : 2023-10-01 DOI: 10.2320/matertrans.mt-m2023093

Ivan Lobzenko, Tomohito Tsuru, Hideki Mori, Daisuke Matsunaka, Yoshinori Shiihara

{"title":"Implementation of Atomic Stress Calculations with Artificial Neural Network Potentials","authors":"Ivan Lobzenko, Tomohito Tsuru, Hideki Mori, Daisuke Matsunaka, Yoshinori Shiihara","doi":"10.2320/matertrans.mt-m2023093","DOIUrl":"https://doi.org/10.2320/matertrans.mt-m2023093","url":null,"abstract":"Atomic stress, utilized in molecular mechanics and molecular dynamics, is valuable in analyzing complex phenomena such as heat transfer, crack propagation and void growth. However, traditional modeling techniques designed for large-scale systems may lack the precision achievable through first-principles calculations. To overcome this limitation, we propose an approach based on artificial neural network (ANN) potentials to compute atomic stress. A crucial aspect of this method is the use of central force decomposition to derive the atomic stress tensor of the ANN potential, ensuring compliance with the balance between linear and angular momentum. By comparing atomic stress calculations for surface systems in Fe and Al using the ANN and embedded-atom (EAM) potentials, we demonstrate that the ANN potential accurately reproduces the stress oscillations near the surface layer predicted by first-principles calculations. This scheme allows us to evaluate atomic stress with nearly the same accuracy as first-principles calculations, even in large-scale models with complex geometries and defect structures.","PeriodicalId":18402,"journal":{"name":"Materials Transactions","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135323366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Suppression of Solidification Defects in Partial Non-Magnetization Improvement for Silicon Steel 硅钢局部非磁化改进中凝固缺陷的抑制

4区材料科学

Materials Transactions Pub Date : 2023-10-01 DOI: 10.2320/matertrans.mt-maw2023001

Norihiko Hamada, Takashi Horikawa, Hironari Mitarai, Katsunari Oikawa, Satoshi Sugimoto

{"title":"Suppression of Solidification Defects in Partial Non-Magnetization Improvement for Silicon Steel","authors":"Norihiko Hamada, Takashi Horikawa, Hironari Mitarai, Katsunari Oikawa, Satoshi Sugimoto","doi":"10.2320/matertrans.mt-maw2023001","DOIUrl":"https://doi.org/10.2320/matertrans.mt-maw2023001","url":null,"abstract":"Leakage flux in rotor core bridges is a problem specific to interior permanent-magnet (IPM) motors. It is widely known that the partial non-magnetization of bridges reduces the magnetic flux leakage. In a previous study, a process was proposed whereby a part of the silicon steel sheet that bridges after pressing was non-magnetized by melting and mixing Ni–Cr alloy powder with a silicon steel sheet using a laser, and the rotor core was produced by laminating them. However, because the final solidification part had solidification defects, such as cracks and shrinkage cavity, the process was proposed to leave a homogenous part free of solidification defects. Therefore, the area of the improved portion increased. We focused on developing a new alloy for non-magnetic improvement to suppress solidification defects. The improved portion was melted and mixed using a laser with various B contents to obtain a composition of Fe–(15–20) mass%Ni–(15–20) mass%Cr–(2–3) mass%Si–(0–1.6) mass%B. Large cracks and large shrinkage cavity were observed in the boron-free alloy. The cracks and shrinkage cavity decreased with an increase in the B content. The minimization of the area of non-magnetic improvement is possible by suppressing solidification defects. Consequently, the laser processing speed per piece and the amount of expensive nickel were reduced. These new alloys show promise for practical applications in the partial non-magnetization process.","PeriodicalId":18402,"journal":{"name":"Materials Transactions","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135323630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Local Atomic Displacements and Sign of the Structural Transformation in Medium-Entropy Alloys Observed in Extended X-ray Absorption Fine Structure Spectra 扩展x射线吸收精细结构光谱中中熵合金的局部原子位移和结构转变标志

IF 1.2 4区材料科学

Materials Transactions Pub Date : 2023-09-01 DOI: 10.2320/matertrans.mt-m2023043

Yoichi Ikeda, Y. Umemoto, D. Matsumura, T. Tsuji, Yuki Hashimoto, T. Kitazawa, Masaki Fujita

引用次数: 0

Multiferroic Property of 2D Hybrid Organic-Inorganic (C6H5C2H4NH3)2NiCl4 Perovskite Single Crystals 二维有机-无机杂化（C6H5C2H4NH3）2NiCl4钙钛矿单晶的多铁磁性

IF 1.2 4区材料科学

Materials Transactions Pub Date : 2023-09-01 DOI: 10.2320/matertrans.mt-mg2022022

L. Cuong, N. D. Hieu, B. D. Tu, N. H. Tiep

引用次数: 0

Enhancing the Hydrophilicity of Non-Woven Fabric Using Atmospheric Pressure Plasma Treatment Optimized by the Design of Experiments 实验设计优化的常压等离子体处理提高非织造布亲水性

IF 1.2 4区材料科学

Materials Transactions Pub Date : 2023-09-01 DOI: 10.2320/matertrans.mt-mi2022008

Mijeong Park, Hee Yeon Jeon, Seungheon Han, Dong Hoon Lee, Young‐In Lee

引用次数: 0

Effect of Microstructural Transformation upon Edge Heat Treatment on Stretch Flangeability of Ultrahigh-Strength Steel with Sheared Edge 边缘热处理组织转变对剪切边超高强钢拉伸法兰性的影响

IF 1.2 4区材料科学

Materials Transactions Pub Date : 2023-09-01 DOI: 10.2320/matertrans.mt-p2023001

Y. Matsuki, Shunsuke Tobita, Kinya Nakagawa, T. Shinmiya, Y. Yamasaki, Y. Tamai

引用次数: 0

Preface 前言

IF 1.2 4区材料科学

Materials Transactions Pub Date : 2023-09-01 DOI: 10.2320/matertrans.mpr2023906

Tomoyuki Yamamoto, M. Yoshiya, N. Hoang

引用次数: 0

Effect of Casting Speed on Floating Grains in Direct-Chill Casting of Aluminum Alloys 铸造速度对铝合金直接冷铸浮晶的影响

IF 1.2 4区材料科学

Materials Transactions Pub Date : 2023-09-01 DOI: 10.2320/matertrans.mt-m2023017

Yi Zhang, Jianquan Ling, Ziwei Yao, Fangzhen Liu, Qi-peng Dong, H. Nagaumi

引用次数: 0

Microstructures and Oxide Scale of Melted Mark on Copper Wire Solidified under Various Cooling Conditions and Subsequent Heat Exposure 不同冷却条件及后续热暴露下铜丝熔痕的显微组织及氧化皮

IF 1.2 4区材料科学

Materials Transactions Pub Date : 2023-09-01 DOI: 10.2320/matertrans.f-m2023806

Suphattra Sachana, K. Morishita, H. Miyahara

引用次数: 0