Materials Engineering eJournal最新文献_第5页

Direct Observations of Changes in Ferroelectric Domain Configurations Around the Indentation and Ahead of the Crack Front 压痕周围和裂纹前缘前方铁电畴结构变化的直接观察

Materials Engineering eJournal Pub Date : 2021-01-01 DOI: 10.2139/ssrn.3831029

V. Kathavate, H. Sonagara, B. Kumar, I. Singh, K. Eswar Prasad

引用次数: 0

H2 Generation by Water Dissociation on Nano Alloy Clusters 纳米合金团簇水解离制氢

Materials Engineering eJournal Pub Date : 2021-01-01 DOI: 10.2139/ssrn.3929881

Wenli Xie, Xinxin Jiang, Ge Xu, Xuhui Xu, Quan Gao, Bin Cui, De-sheng Liu, Dongmei Li

引用次数: 0

Crystallographic Orientation Dependent Fracture Behavior in Tantalum Single Crystals 钽单晶中晶体取向相关断裂行为

Materials Engineering eJournal Pub Date : 2021-01-01 DOI: 10.2139/ssrn.3680336

Hojun Lim, P. Noell, J. Carroll

引用次数: 10

Formation of Nodular Bainite in a Fe-9.10ni-0.06c (Wt. %) Alloy: A New Microstructure for Cryogenic Steels Fe-9.10ni-0.06c (Wt. %)合金中球墨贝氏体的形成:一种低温钢的新组织

Materials Engineering eJournal Pub Date : 2021-01-01 DOI: 10.2139/ssrn.3893497

Y. Bagheri, H. Kamali, Erfan Kamali, S. Hossein Nedjad

引用次数: 1

Bi2O3-B2O3-CaF2-EuF3 Glass-Ceramics for Efficient Orange-Red Laser Applications 高效橙红激光应用的Bi2O3-B2O3-CaF2-EuF3玻璃陶瓷

Materials Engineering eJournal Pub Date : 2021-01-01 DOI: 10.2139/ssrn.3901725

Chinna Jamalaiah Bungala, Madhu Napa, Venkata Rao Kasukurthi, Pavani Krishnapuram

引用次数: 0

Revealing the Nucleation and Growth Mechanisms of Fe-Rich Phases in Al-Cu-Fe(-Si) Alloys Under the Influence of Al-Ti-B Al-Ti-B影响下Al-Cu-Fe(-Si)合金富铁相形核和生长机制的研究

Materials Engineering eJournal Pub Date : 2021-01-01 DOI: 10.2139/ssrn.3919733

Yuliang Zhao, Dong-Won Song, Haoliang Wang, Lijia Chen, Zhenzhong Sun, T. Zhai, Ya-nan Fu, Yao Wang, Shuhong Liu, Yong Du, Weiweng Zhang

{"title":"Revealing the Nucleation and Growth Mechanisms of Fe-Rich Phases in Al-Cu-Fe(-Si) Alloys Under the Influence of Al-Ti-B","authors":"Yuliang Zhao, Dong-Won Song, Haoliang Wang, Lijia Chen, Zhenzhong Sun, T. Zhai, Ya-nan Fu, Yao Wang, Shuhong Liu, Yong Du, Weiweng Zhang","doi":"10.2139/ssrn.3919733","DOIUrl":"https://doi.org/10.2139/ssrn.3919733","url":null,"abstract":"Al-5Ti-1B is commonly added to the Al alloys for grain refinement, which also affects the type, size, morphology, and formation sequence of Fe-rich intermetallic phases. The underlying nucleation and growth mechanism of Fe-rich phases under the influence of Al-5Ti-1B during the solidification of Al-Cu-Fe(-Si) alloys were systematically studied by thermodynamic calculation, and with scanning electron microscopy (SEM), X-ray diffraction (XRD), differential scanning calorimetry (DSC), focused ion beam (FIB) coupled with transmission electron microscopy (TEM), and in-situ synchrotron X-ray radiography. The SEM and in-situ synchrotron X-ray radiography experiments revealed that the Al-5Ti-1B addition significantly reduced the size and number of primary Al3(CuFe) phases. and refined the size of α-Fe in Al-Cu-Fe-Si alloy without changing their type. This was caused by Ti solute atoms in Al melts, which limiting the nucleation and growth of primary Al3(CuFe) phases during solidification. The FIB and TEM results showed that the prior formed TiB2 particles or/and newly-formed aluminium oxide were nucleate sites for Al6(CuFe) phase and α-Fe phase in Al-Cu-Fe alloy and Al-Cu-Fe-Si alloy, respectively. The Edge-to-Edge model and orientation relationship further confirmed the experimental results. In addition, V diffusion into TiB2 particles in the Al melts to form (TiV)B2 particles and lowering the interfacial energy enhance the heterogenous nucleation for Fe-rich phases.","PeriodicalId":18268,"journal":{"name":"Materials Engineering eJournal","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88144671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Flexural Properties of a Heat - Polymerized Polymethyl Methacrylate Denture Resin Reinforced with Basalt Fibers 玄武岩纤维增强热聚合聚甲基丙烯酸甲酯义齿树脂的抗弯性能

Materials Engineering eJournal Pub Date : 2021-01-01 DOI: 10.2139/ssrn.3876088

Alaa'a Salloum

{"title":"Flexural Properties of a Heat - Polymerized Polymethyl Methacrylate Denture Resin Reinforced with Basalt Fibers","authors":"Alaa'a Salloum","doi":"10.2139/ssrn.3876088","DOIUrl":"https://doi.org/10.2139/ssrn.3876088","url":null,"abstract":"Background: Fracture of denture base made of  Polymethylmethacrylate (PMMA) is a common clinical problem. To overcome this problem, several ways are used for reinforcement the PMMA . No information is available in the dental literature regarding the effect of incorporating basalt fibers on the mechanical properties of  the PMMA. This study therefore investigated the flexural properties of heat-polymerized denture base acrylic resin reinforced with untreated chopped basalt fibers, and with monomer, silane, or phosphoric acid- treated chopped basalt fibers. Methods: Sample was equally divided into five groups: group C (unreinforced with basalt fibers), group UBF (reinforced with untreated basalt fibers), group MBF (reinforced with monomer treated basalt fibers), group SBF (reinforced with silanized basalt fibers) and group PhABF (reinforced with basalt fibers treated by phosphoric acid 35%). A 3-point bending test was carried out for the test specimens with a universal testing machine. Results: Flexural strength of  Group MBF (83.71 ± 2.19)MPa and SBF (73.37 ± 2.1)MPa  significantly increased in comparison of Group C (67.13 ± 1.60)MPa and the MBF group recorded the highest flexural strength. Conclusions: Reinforcement the PMMA with monomer treated basalt fibers can be recommended.","PeriodicalId":18268,"journal":{"name":"Materials Engineering eJournal","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91100446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dislocation Entangled Mechanisms and 3D-2D Interface in Copper-Graphene Nanocomposite Fabricated by High-Pressure Sintering 高压烧结制备铜-石墨烯纳米复合材料中的位错纠缠机制和三维-二维界面

Materials Engineering eJournal Pub Date : 2021-01-01 DOI: 10.2139/ssrn.3845645

N. Khobragade, A. Swiderska-Sroda, W. Łojkowski, P. N. Babu, S. Pal, T. Maity, D. Roy

引用次数: 0

Effect of Pt-Ni Deposition Sequence in PtNi-Modified Boron-Doped Diamond on Catalytic Performance for Glucose Oxidation Under Neutral pH Conditions 中性pH条件下ptni修饰掺硼金刚石中Pt-Ni沉积顺序对葡萄糖氧化催化性能的影响

Materials Engineering eJournal Pub Date : 2021-01-01 DOI: 10.2139/ssrn.3920309

Ruitong Zhu, Zihua Zhao, Jun Cao, Haichao Li, Li Ma, K. Zhou, Zhiming Yu, Qiu-ping Wei

{"title":"Effect of Pt-Ni Deposition Sequence in PtNi-Modified Boron-Doped Diamond on Catalytic Performance for Glucose Oxidation Under Neutral pH Conditions","authors":"Ruitong Zhu, Zihua Zhao, Jun Cao, Haichao Li, Li Ma, K. Zhou, Zhiming Yu, Qiu-ping Wei","doi":"10.2139/ssrn.3920309","DOIUrl":"https://doi.org/10.2139/ssrn.3920309","url":null,"abstract":"With the increasing number of diabetic patients, considerable attention has been paid to developing metal nanomaterial glucose sensors for detecting under physiological pH conditions. In this work, Pt-Ni modified boron-doped diamond (BDD) electrodes were fabricated and achieved a continuous and stable response to glucose under neutral pH conditions. Besides, effects of the electrochemical deposition sequence on the morphology and electrocatalytic properties of the Pt-Ni bimetal had been found. Electrochemical performance tests showed that the Pt-Ni bimetal clusters prepared by the co-deposition (one step) method had higher stability and sensitivity for the glucose detection than those prepared by the two-step deposition method. The loss of the oxidation peak current of PtNi-BDD is 21.74% after 200 consecutive cyclic voltammetry cycles (2400 s). While Ni/Pt-BDD and Pt-BDD only maintained 55.8% and 60.03% of their initial current response after continuous 1200 s cyclic voltammetry. In addition, the sensitivity of PtNi-BDD was 110.375 μA cm -1 mm -1 in the range of 2-12 mM glucose concentration, which was 5.966, 15.49, and 6.13 times higher than that of Pt/Ni-BDD, Ni/Pt-BDD, and single metal Pt, respectively.","PeriodicalId":18268,"journal":{"name":"Materials Engineering eJournal","volume":"71 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89555903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Temperature-Responsive Biodegradable Injectable Polymers Having Tissue Adhesive Properties for Biomedical Materials 具有生物医学材料组织黏附性能的温度响应型可生物降解注射聚合物

Materials Engineering eJournal Pub Date : 2021-01-01 DOI: 10.2139/ssrn.3855768

Soichiro Fujiwara, Yuta Yoshizaki, A. Kuzuya, Y. Ohya

{"title":"Temperature-Responsive Biodegradable Injectable Polymers Having Tissue Adhesive Properties for Biomedical Materials","authors":"Soichiro Fujiwara, Yuta Yoshizaki, A. Kuzuya, Y. Ohya","doi":"10.2139/ssrn.3855768","DOIUrl":"https://doi.org/10.2139/ssrn.3855768","url":null,"abstract":"Injectable polymers (IPs) exhibiting in situ hydrogel formation have attracted attention as vascular embolization and postoperative adhesion prevention materials. When using them for such purposes, attribution of tissue adhesion property to the hydrogel is important. We previously reported a temperature-responsive biodegradable IP system using triblock copolymers of poly(ε-caprolactone-co-glycolic acid) and poly(ethylene glycol) (tri-PCGs). Recently, we developed IP systems containing acrylate-capped tri-PCG (tri-PCG-Acryl) and polythiol compound (DPMP)-loaded tri-PCG. This IP system exhibit temperature-responsive gelation, where chemical cross-links were formed via thiol-ene reaction. The duration of gel state under physiological conditions and its physical properties could be controlled by changing the content of tri-PCG-Acryl and DPMP in the system. In this study, the addition of aldehyde-modified Pluronic (PL-CHO) was investigated for attributing tissue adhesive properties to the IP system. This IP system containing PL-CHO showed high tissue adhesive properties by Schiff base formation between the aldehyde groups and the biological tissue surface. We evaluated the possibility of using IP system as vascular embolization materials and postoperative adhesion prevention materials. The IP system showed good embolization performance in blood vessels, resisting pressure. The IP hydrogel remained at the administration site in the abdominal space for 2 days and showed effective adhesion prevention performance.","PeriodicalId":18268,"journal":{"name":"Materials Engineering eJournal","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74270245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0