材料科学与应用期刊(英文)最新文献_第7页

Measurement of the Energy Absorbed during Nanoscale Deformation of Human Peritubular and Intertubular Dentin 人小管周围和管间牙本质纳米尺度变形过程中吸收能量的测量

材料科学与应用期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/msa.2022.134010

Jiahau Yan, B. Taskonak, John J. Mecholsky Junior

{"title":"Measurement of the Energy Absorbed during Nanoscale Deformation of Human Peritubular and Intertubular Dentin","authors":"Jiahau Yan, B. Taskonak, John J. Mecholsky Junior","doi":"10.4236/msa.2022.134010","DOIUrl":"https://doi.org/10.4236/msa.2022.134010","url":null,"abstract":"Mineralized tissues are usually constructed of nanosized materials with ordered hierarchical structures. The main reason for their high load-bearing ability is the multi-scale hierarchy. It is important to have a method for mea-suring the energy absorbed during the nanoscale deformation of mineralized tissues. The objective of this study was to use a combination of nanoindentation and elastic-plastic mechanics techniques to measure the damage resistance of peritubular and intertubular dentin, based on the energy consumed in the plastic deformation regime and the volume created by the indents. The control materials were soda-lime glass, gold, and poly-methyl methacrylate (PMMA). Plastic deformation energy was calculated from the plastic part of load-displacement curves. The mean values of peritubular dentin and intertubular dentin were 3.8 × 10 9 , and 5.2 × 10 9 J/m 3 , respectively, compared to glass, PMMA, and gold which were 3.3 × 10 7 , 1.3 × 10 9 , and 3.1 × 10 9 J/m 3 , respectively. This method can be applied to study the resistance of mineralized tissues or organic/inorganic hybrid materials to deformation at the nanoscale.","PeriodicalId":68376,"journal":{"name":"材料科学与应用期刊(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70513134","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: 1

Preparation of Flax Residue Activated Carbon by KOH Method and Its Electrode Performance KOH法制备亚麻渣活性炭及其电极性能

材料科学与应用期刊(英文) Pub Date : 2021-09-24 DOI: 10.4236/msa.2021.129028

Binghu Wang, Shujun Li, Wenying Tan

引用次数: 0

Feasibility of 0.02% Nb-Based Microalloyed Steel for the Application of One-Step Quenching and Partitioning Heat Treatment 0.02%Nb基微合金钢用于一步淬火和分区热处理的可行性

材料科学与应用期刊(英文) Pub Date : 2021-08-04 DOI: 10.4236/msa.2021.128026

Basem Tarek, Eman El-Shenawy, A. El-Sabbagh, M. Taha

{"title":"Feasibility of 0.02% Nb-Based Microalloyed Steel for the Application of One-Step Quenching and Partitioning Heat Treatment","authors":"Basem Tarek, Eman El-Shenawy, A. El-Sabbagh, M. Taha","doi":"10.4236/msa.2021.128026","DOIUrl":"https://doi.org/10.4236/msa.2021.128026","url":null,"abstract":"To attain an enhanced combination of mechanical properties for low alloyed steel, the current study has been made to fulfill that growing need in the industry. Its results are introduced within this paper. One step Quenching and Partitioning (Q&P) heat treatment has been applied on Niobium-based microalloyed steel alloy with 0.2 %C, in the form of 2 mm thickness sheets. The target of this study is to investigate the viability of applying that significantly recommended, results-wise, heat treatment on the highly well-suited alloy steel samples, to achieve the main target of enhanced properties. A single temperature of 275°C was used as quenching and Partitioning temperature. Four Partitioning periods (30, 200, 500, and 1000 Seconds) were used for soaking at the same temperature. The results were analyzed in the light of microstructural investigation and mechanical testing. All applied cycles did not enhance the strength but moderately improved the ductility and toughness, mainly caused by the slightly high soaking temperature used. Niobium impact of grain refining was apparent through all cycles. The cycle of 500 Seconds Partitioning time obtained optimum values at that particular temperature. The 1000 Seconds Cycle obtained the worst combination of properties. A set of recommendations are set. More research is required at this point, where a lower Partitioning temperature is advised. In the light of the applied combination of parameters, the Partitioning period at such temperature is advised to be between 500 and 1000 Seconds. A high probability that periods closer to 500 than 1000 Seconds will produce better results. More research is needed between those two values of Partitioning time to precisely determine the optimum time at that temperature on that specific alloy.","PeriodicalId":68376,"journal":{"name":"材料科学与应用期刊(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43886128","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: 2

Characterization of CdZnTeSe Nuclear Detector Chemically Etched in Bromine Methanol 溴-甲醇化学蚀刻CdZnTeSe核探测器的表征

材料科学与应用期刊(英文) Pub Date : 2021-08-04 DOI: 10.4236/msa.2021.128025

E. Agbalagba, Mebougna L. Drabo, S. Egarievwe, U. Roy, Amir H. Davis, Mordecai B. Israel, Parion L. Alexander, R. James

引用次数: 3

Research Progress of the Modification in Sulfur Concrete 含硫混凝土改性研究进展

材料科学与应用期刊(英文) Pub Date : 2021-07-01 DOI: 10.4236/msa.2021.127024

Xuemin You

引用次数: 2

Influence of Vanadium Additions on the Performance of Mo3Si 钒添加量对Mo3Si性能的影响

材料科学与应用期刊(英文) Pub Date : 2021-07-01 DOI: 10.4236/msa.2021.127023

I. Rosales-Cadena

引用次数: 0

Mechanical Characterization and Micro-Wear of FeB-Fe2B Layers on Boriding AISI D2 and AISI 4340 Steels 渗硼AISI D2和AISI 4340钢的FeB-Fe2B层力学特性及微磨损

材料科学与应用期刊(英文) Pub Date : 2021-07-01 DOI: 10.4236/msa.2021.127022

Suellen Terroso de Mendonça Ferreira, André Luiz Klemes Bacco, E. Nascimento, C. M. Lepienski

引用次数: 5

Influence of Types of Fillers on Workability, Bleeding, Compressive Strength, and Degree of Compaction of Hydraulic Concrete 填料类型对水工混凝土和易性、渗水、抗压强度和压实度的影响

材料科学与应用期刊(英文) Pub Date : 2021-06-18 DOI: 10.4236/msa.2021.126019

M. Diagne, I. Dia, O. Gueye

{"title":"Influence of Types of Fillers on Workability, Bleeding, Compressive Strength, and Degree of Compaction of Hydraulic Concrete","authors":"M. Diagne, I. Dia, O. Gueye","doi":"10.4236/msa.2021.126019","DOIUrl":"https://doi.org/10.4236/msa.2021.126019","url":null,"abstract":"This study aims to determine the optimal quantity of fillers to add to hydraulic concrete and to assess the influence of these fillers on its rheological characteristics and mechanical properties. The characterization of the aggregates shows that they meet the specifications for the formulation of hydraulic concrete according to the Dreux-Gorisse method. Normalizing the formula to the cubic meter enables to define the standard concrete. The cement content is 350 kg/m3. The mineral materials added to the concrete to increase its characteristics and properties are limestone, basalt, and sandstone fillers with a weight percent of 4%, 5%, and 3% respectively. Changes in concrete properties with the addition of fillers were determined through geotechnical tests. The results obtained show a decrease in the workability measured by slump test which returned 7.8 cm for the standard concrete sample, 7.2 cm with 5% of basalt, 7.3 cm with 4% of limestone, and 6.1 cm with 3% of sandstone. Regarding the bleeding, the results show that it decreases leading to a substantial improvement in stabilization reaching 26% with 5% of basalt fillers, 29% with 4% of limestone fillers, and 31% with 3% of sandstone fillers. The compressive strengths noted Rc28 at 28 days increases compared to that of the standard concrete, which is 31.5 MPa. They increase to 34.3 MPa with 5% of basalt fillers being 8.9%, 36.2 MPa with 4% of limestone fillers being 14.9%, and 36.8 MPa with 3% of sandstone fillers being 16.8%. Finally, the addition of fillers increases the degree of compaction values to 83.62% with 5% of basalt fillers, 84.2% with 4% of limestone fillers, and 84.34% with 3% of sandstone fillers.","PeriodicalId":68376,"journal":{"name":"材料科学与应用期刊(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48782706","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

Characterization and Application of the Makoua Clay in the Chemical and Bacteriological Depollution of Gutter and Well Waters of Brazzaville Makoua粘土的特性及其在布拉柴维尔排水沟和井水化学和细菌去除中的应用

材料科学与应用期刊(英文) Pub Date : 2021-06-18 DOI: 10.4236/msa.2021.126018

Ferland Ngoro-Elenga, A. Ngopoh, H. Elenga, Jean-Romuald Mambou, Jude Novelgi Ngakosso Ngolo, T. Nsongo

{"title":"Characterization and Application of the Makoua Clay in the Chemical and Bacteriological Depollution of Gutter and Well Waters of Brazzaville","authors":"Ferland Ngoro-Elenga, A. Ngopoh, H. Elenga, Jean-Romuald Mambou, Jude Novelgi Ngakosso Ngolo, T. Nsongo","doi":"10.4236/msa.2021.126018","DOIUrl":"https://doi.org/10.4236/msa.2021.126018","url":null,"abstract":"In this work, the authors made aquatic filters according to the formulation “clay stabilized at 4% of cement mixed with 4% of kambala sawdust and 10% of white sand” then heated to 1050°C to decontaminate the waters of gutters and wells. The authors carried out geotechnical, geochemical, thermal, infrared spectroscopy, and scanning electron microscopy that analyzed the clay material. Geotechnical analyzes have shown that this material is made up of 22% thin sand, 22% of silt, and 56% of clay with 26 plasticity index. The geochemical analysis showed the presence of trace elements shared out as follows: 3% of alkaline metals, 24% of alkaline earth metals, 46% of transition metals, 10% of metal, 16% of lanthanides, 1% of actinides. The most abundant trace elements are barium (19%), vanadium (12%), chromium (11%) and zinc (9%). The thermal and microscopic analyzes revealed the kaolinitic nature of materials. The chemical depollution studies have shown elimination yields of 50% - 52.38% of sulphates; 77.33% - 85.19% of phosphates; 34.85% - 88.49% nitrates; 91.3 - 100 of sulphides; The removal of bacteriological pollution are 92.8% - 98% of total germs; 94% - 97% of total coliform and 95% - 98% of E. coli.","PeriodicalId":68376,"journal":{"name":"材料科学与应用期刊(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48915479","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: 1

Changing Mechanicals Characteristiques of Cementitious Materials Using Titanium Dioxide 利用二氧化钛改变胶凝材料的力学特性

材料科学与应用期刊(英文) Pub Date : 2021-06-18 DOI: 10.4236/msa.2021.126020

Valéry K. Doko, S. P. Hounkpe, S. O. Kotchoni, Li Hui, Abbas Tiambo Datchossa

引用次数: 1