Key Engineering Materials最新文献_第2页

Green Composite Concrete Incorporating with Non-Biodegradable Wastes 掺入不可降解废物的绿色复合混凝土

Key Engineering Materials Pub Date : 2024-07-10 DOI: 10.4028/p-l6mbsu

Laongdaw Techawinyutham, Phattaraporn Maksirikul, Paimuang Nannalin, Wiroj Techawinyutham

引用次数: 0

Antibacterial Food Packaging Containing Stably Dispersed Cu Nanoparticles Synthesized by Novel Physical Vapor Deposition Process 采用新型物理气相沉积工艺合成的含有稳定分散的铜纳米粒子的抗菌食品包装

Key Engineering Materials Pub Date : 2024-07-10 DOI: 10.4028/p-y3thxa

Sanghoon Lee, Ho Seok Lee, Seok Keun Koh

引用次数: 0

Finite Element Analysis of Functionally Graded Sandwich Plates 功能分级三明治板的有限元分析

Key Engineering Materials Pub Date : 2024-07-10 DOI: 10.4028/p-i4alau

Simmi Gupta, H. D. Chalak

引用次数: 0

Incorporation of Silicone Mold Residues Influence on Acoustic Properties of Subfloor Mortars 硅树脂模具残留物对底层砂浆声学特性的影响

Key Engineering Materials Pub Date : 2024-07-10 DOI: 10.4028/p-oskg8x

Daniel G.W. Rodrigues, C. M. Stolz, Bruno B.F. da Costa, Mayara Amario, A. N. Haddad

{"title":"Incorporation of Silicone Mold Residues Influence on Acoustic Properties of Subfloor Mortars","authors":"Daniel G.W. Rodrigues, C. M. Stolz, Bruno B.F. da Costa, Mayara Amario, A. N. Haddad","doi":"10.4028/p-oskg8x","DOIUrl":"https://doi.org/10.4028/p-oskg8x","url":null,"abstract":"The determination of minimum performance criteria for residential buildings has encouraged the development of new technologies by companies linked to the construction industry. In this context, the acoustic performance of floor systems is of great importance. One of the solutions to improve the performance of these systems is the incorporation of lightweight aggregates to replace natural fine aggregates in the subfloor mortars, with the aim of attenuating the noise caused by impact, thus improving acoustic performance. Therefore, the objective of this study was to analyze the properties of a subfloor mortar in a 1:4 ratio (cement:sand), with the incorporation of silicone mold residue, replacing natural fine aggregate, in proportions of 10%, 20%, and 30%. %, and a water/cement ratio (w/c) of 0.93. Tests were performed in the fresh and hardened state, such as incorporated air content, mass density, consistency index, flexural tensile strength, compressive strength, water absorption by capillarity, in addition to a specific test to determine the difference in sound pressure level between specimens. The results indicated that the mortar consistency was influenced by the incorporation of waste, increasing with its incorporation. The increase in consistency positively influenced the mechanical resistance of the mortars, which showed an increase with higher residue content, due to the reduction in the amount of voids. Consequently, densities also increased with high waste content. The acoustic test showed satisfactory results, with good attenuation of 10%, indicating an 8 dB improvement in the sound pressure level. The results presented show that the residue has great potential for acoustic attenuation.","PeriodicalId":17714,"journal":{"name":"Key Engineering Materials","volume":"17 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141661097","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

Advanced Treatment Technologies for Pollutants Removal in Wastewater 去除废水中污染物的先进处理技术

Key Engineering Materials Pub Date : 2024-07-10 DOI: 10.4028/p-0bwb2m

M. Fawzy, H. Ahmed, Hossam F. Nassar

{"title":"Advanced Treatment Technologies for Pollutants Removal in Wastewater","authors":"M. Fawzy, H. Ahmed, Hossam F. Nassar","doi":"10.4028/p-0bwb2m","DOIUrl":"https://doi.org/10.4028/p-0bwb2m","url":null,"abstract":"Conventional wastewater treatment technologies have been extensively studied for degrading organic matter, suspended solids, nutrient removal, and lowering microbial loads. They produce acceptable-quality effluent, but researchers have reported several limitations. Recently, advanced wastewater treatment technologies have preceded as an alternative to the degradation of recalcitrant wastes such as persistent organic compounds (POPs), pharmaceutically active compounds (PhACs), contaminants of emerging concern (CECs), and heavy metals (H.M). They can be physical, chemical, biological, or integration between one or more technologies. This is to meet the requirements for reuse for different purposes, minimize or prevent the negative impacts on the environment, and create new untraditional water resources to solve the water shortage problem. This article is a collected review of advanced wastewater treatment technologies. Also, the applications of these technologies with special concern for partially/hardly degradable pollutants from wastewater are indicated. They are eco-friendly, cost-effective, low-energy systems with a small footprint. Their selection depends on the characterization of wastewater, biodegradability, available footprint, quality of treated effluent required, cost, availability of funds, and personal skills.","PeriodicalId":17714,"journal":{"name":"Key Engineering Materials","volume":"13 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141661428","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

Brazing of Copper Foam Using Cu-4.0Sn-9.9Ni-7.8P Filler Foil: Effect of Brazing Temperature and Copper Foam Pore Density 使用 Cu-4.0Sn-9.9Ni-7.8P 填充箔钎焊泡沫铜：钎焊温度和泡沫铜孔隙密度的影响

Key Engineering Materials Pub Date : 2024-07-03 DOI: 10.4028/p-tB1ZF5

Nur Amirah Mohd Zahri, Yukio Miyashita, Tadashi Ariga, A. S. Md. Abdul Haseeb, N. L. Sukiman

{"title":"Brazing of Copper Foam Using Cu-4.0Sn-9.9Ni-7.8P Filler Foil: Effect of Brazing Temperature and Copper Foam Pore Density","authors":"Nur Amirah Mohd Zahri, Yukio Miyashita, Tadashi Ariga, A. S. Md. Abdul Haseeb, N. L. Sukiman","doi":"10.4028/p-tB1ZF5","DOIUrl":"https://doi.org/10.4028/p-tB1ZF5","url":null,"abstract":"Copper (Cu) foam is a promising material that owns a high surface area that can be utilized in a thermal application. In this research, the brazing of Cu substrate to Cu foam in the sandwich configuration using Cu alloy filler foil was carried out. The foam at different pore per inch (PPI) of 15, 25 and 50 are brazed at different brazing temperatures. Mechanical and microstructure analysis were conducted to investigate a suitable brazing temperature and the best pore density of foam. The compressive strength of brazed 50 PPI foam has yielded the highest due to the highly dense interconnected branches. While the highest shear strength of brazed interface using 15 PPI foam has been recorded. The large branch size of 15 PPI foam has contributed to the sound joint between the brazed joint interface of Cu substrate and foam. Both mechanicals analysis above exhibits a highest strength at 660 °C as a brazing temperature The shear stress-strain curve of Cu substrate and foam brazed joint interface shows a brittle behaviour which accordance with the discoverable brittle phases of Cu3P and Ni3P using X-ray diffraction (XRD). Scanning electron microscopy (SEM) and Energy dispersive X-ray spectroscopy (EDX) have presented the formation of Cu3P and Ni3P at the brazed joint interface of Cu substrate and foam.","PeriodicalId":17714,"journal":{"name":"Key Engineering Materials","volume":"50 s176","pages":"67 - 76"},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141682260","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

The Role of Ceramic Materials in Surface Modification of Cutting Tools - A Review Paper 陶瓷材料在切削工具表面改性中的作用 - 综述论文

Key Engineering Materials Pub Date : 2024-07-03 DOI: 10.4028/p-V9hXic

W. Asaad, Shaima’a J. Kareem, H. Al-Ethari

引用次数: 0

Effect of Heat Treatment on Mechanical Properties and Corrosion Response of HVOF Sprayed High Entropy Alloy Coatings 热处理对 HVOF 喷射高熵合金涂层机械性能和腐蚀反应的影响

Key Engineering Materials Pub Date : 2024-07-03 DOI: 10.4028/p-UVGG3f

N. Abhijith, Deepak Kumar, Karun Rawat

{"title":"Effect of Heat Treatment on Mechanical Properties and Corrosion Response of HVOF Sprayed High Entropy Alloy Coatings","authors":"N. Abhijith, Deepak Kumar, Karun Rawat","doi":"10.4028/p-UVGG3f","DOIUrl":"https://doi.org/10.4028/p-UVGG3f","url":null,"abstract":"Surface and sub-surface related degradation of steels can be minimized using suitable surface coatings. High entropy alloys (HEA) are prominent and emerging materials among many coating materials. The current study investigates the effect of heat treatment of HEA coating on mechanical, metallurgical, and corrosion properties. The HEA coatings on SS304 steel were deposited using a High-Velocity Oxy-Fuel (HVOF) thermal spray process. The developed coatings were furnace heat treated at 700 °C, 900 °C, and 1100 °C, respectively, and their performance was benchmarked with the as-sprayed coatings. The metallurgical, mechanical, and microstructural analyses were performed using X-ray diffraction (XRD), Nanoindentation, Scratch test, and Field Emission Scanning Electron Microscope (FESEM) techniques. The corrosion response of the as sprayed and heat-treated coatings were recorded using a Potentiostat. The results indicated that as-sprayed coatings consisted of a single-phase BCC solid solution; however, the single-phase changed to a dual dual-phase system after heat treatment (BCC+FCC). The 900 °C heat-treated HEA coating exhibited superior mechanical and corrosion properties. But those characteristics started diminishing when the heat treatment temperature exceeded 900 °C. The introduction of the new FCC phase softened the coating, thereby leading to the evolution of microcracks in the coating. These micro-cracks acted as channels for electrolyte diffusion and further corroded the coatings. The current study surmised that HVOF-sprayed HEA coating should not be heat treated at above 900 °C.","PeriodicalId":17714,"journal":{"name":"Key Engineering Materials","volume":"54 2","pages":"3 - 8"},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141682320","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

Fabrication and Evaluation of Mechanical and Tribological Properties of Al-Foam Produced by Powder Metallurgy Route 粉末冶金法生产的铝泡沫的制造与机械和摩擦学性能评估

Key Engineering Materials Pub Date : 2024-07-03 DOI: 10.4028/p-bH7i4s

Amir Ali Mohammed, Haidar Akram Hussein

{"title":"Fabrication and Evaluation of Mechanical and Tribological Properties of Al-Foam Produced by Powder Metallurgy Route","authors":"Amir Ali Mohammed, Haidar Akram Hussein","doi":"10.4028/p-bH7i4s","DOIUrl":"https://doi.org/10.4028/p-bH7i4s","url":null,"abstract":"In the present study, the production of aluminum foam was carried out using the powder metallurgy technique, specifically employing the sintering – dissolution process (SDP). The SDP method, which constitutes a sequential series of four well-defined steps, was employed to achieve the desired foam structure and properties. These steps involved carefully controlling the parameters and conditions throughout the process to ensure successful foam formation. Aluminum powder with a particle size of (1.99 μm) as a raw material was mixed with NaCl with a particle size between (150-425μm) used as a space holder at different ratio (25, 35, 45and 55 wt. %.). Obtained Al-foam with 45% NaCl demonstrated the most optimal structure. Some additives (Mg) added to the powder mixture, it was found that the mechanical and the tribological properties of the produced foam were improved. The introduction of metal’s micro-particles led to a notable enhancement in both compressive stress and micro-hardness, the compressive stress increased substantially from 15.2 MPa to 56.5 MPa for the foam containing 45% NaCl and 45% NaCl + Add., respectively. While the micro-hardness exhibited a noteworthy increase from 51.5 HV to 62.1 HV. Results also showed important reduction in the wear rate from (0.00000155 g/cm) to (0.00000079 g/cm) for the Al-samples of (45% NaCl) and (45% NaCl+ Additive) respectively, the lowest value recorded for the coefficient of friction was (0.15) for (Al-Foam with 45% NaCl + Additive) compare to (0.19) and (0.21) for (Al-foam with 45% NaCl) and (pure Al) respectively at 10 N applied load and 800 rpm.","PeriodicalId":17714,"journal":{"name":"Key Engineering Materials","volume":"80 1","pages":"147 - 164"},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141683893","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

Build Orientation Effect on Bending Fatigue Performance and Impact Toughness of Laser Powder Bed Fusion Manufactured Ti6Al4V Without Heat Treatment 构建方向对激光粉末床熔融制造的 Ti6Al4V（无热处理）弯曲疲劳性能和冲击韧性的影响

Key Engineering Materials Pub Date : 2024-07-03 DOI: 10.4028/p-9D9PGl

T. Rautio, M. Jaskari, M. Hietala, Aappo Mustakangas, M. Keskitalo, A. Järvenpää

{"title":"Build Orientation Effect on Bending Fatigue Performance and Impact Toughness of Laser Powder Bed Fusion Manufactured Ti6Al4V Without Heat Treatment","authors":"T. Rautio, M. Jaskari, M. Hietala, Aappo Mustakangas, M. Keskitalo, A. Järvenpää","doi":"10.4028/p-9D9PGl","DOIUrl":"https://doi.org/10.4028/p-9D9PGl","url":null,"abstract":"Titanium alloys are highly valued in various industries due to their exceptional qualities. This study examines how the build orientation affects the mechanical and fatigue properties of Laser Powder Bed Fusion (PBF-LB) produced Ti6Al4V, without heat treatment. The research shows mechanical properties vary based on build orientation with vertically oriented specimens exhibiting the highest yield and tensile strengths, while vertical orientation excels in ductility, measured through elongation at break. Impact toughness sees variations with horizontal orientation performing the best. However, build orientation has minimal influence on flexural bending fatigue performance. Both diagonal and vertical orientations show similar fatigue limits at around 40 MPa. Dry electropolishing proves to be an effective technique, significantly enhancing fatigue performance with limits stabilizing at about 150 MPa. This study underscores the importance of considering build orientation in PBF-LB manufacturing for specific mechanical and impact properties and the potential of dry electropolishing in improving the fatigue performance of Ti6Al4V components. These findings offer valuable insights for the additive manufacturing industry, aiding in the optimization of Ti6Al4V component production.","PeriodicalId":17714,"journal":{"name":"Key Engineering Materials","volume":"122 6","pages":"9 - 14"},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141682696","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