Recycling Metal Chips Into Usable Materials,
2023
The University of Akron
Recycling Metal Chips Into Usable Materials, Alex Mortensen, Ben Mortensen
Williams Honors College, Honors Research Projects
This report entails the scope, design considerations, and plans for creating a metal chip converter into metal briquettes. The construction is a set of machines with multiple processes to make the conversion happen. The process includes washing fine metal chips, drying them off, compressing them, and melting them down into usable briquettes. This project is intended to make a simple process to recycle metal chips into usable material for reuse. The project's objective is to reduce the costs of storage and recycling waste by offering a solution to recycle it into materials the shop can reuse.
Beeswax Wraps As An Alternative To Single-Use Plastics,
2023
The University of Akron
Beeswax Wraps As An Alternative To Single-Use Plastics, Sarah Skiver
Williams Honors College, Honors Research Projects
The project goal was to compare the food storage efficacy of sustainable beeswax wraps verses the single-use plastic methods of resealable plastic sandwich bags and plastic cling wrap. The goal was also to test the reusability of the beeswax wraps, as it is a key advantage of beeswax wraps that is advertised. The project purpose was to explore sustainable and eco-friendly alternatives to single use plastics, which are harmful to the environment in both their production and their disposal. Food spoilage was compared in beeswax wrap, plastic sandwich bags, and plastic cling wrap, and spoilage was also observed in a …
Intergranular And Pitting Corrosion Mechanisms Of Sensitized Aluminum Alloy Aa5083,
2023
The University of Akron
Intergranular And Pitting Corrosion Mechanisms Of Sensitized Aluminum Alloy Aa5083, Clayton Egleston
Williams Honors College, Honors Research Projects
The motivation and objectives of this project is to examine the mechanisms of intergranular corrosion (IGC) and pitting corrosion of sensitized AA5083. In this regard, different characterization techniques were used, including optical analysis of microstructure, cyclic potentiodynamic polarization with Tafel fitting, electrochemical impedance spectroscopy with electrical equivalent circuit (EEC) fitting, and potentiostatic current transient monitoring. The transition from IGC to pitting corrosion occurs when the grain boundaries become saturated with the β-phase (Mg2Al3). It was found that AA5083 becomes more vulnerable to pitting corrosion as the degree of sensitization increases.
Study Of Bounds For Effective Moduli Of Polycrystals And Composites Using Variational Principle For Probabilistic Measures,
2023
Wayne State University
Study Of Bounds For Effective Moduli Of Polycrystals And Composites Using Variational Principle For Probabilistic Measures, Md. Tofiqul Islam
Wayne State University Dissertations
Tensors that are invariant with respect to subgroups of 3D group of rotations were constructed first by Lokhin and Sedov (J. Appl. Math. Mech. (PMM), 1963, 27, 597-629). In this paper we do one more step and derive formulas for the elastic modulus tensors for all symmetry groups from the Lokhin-Sedov results. The tensor basis obtained in this way has an advantage of being built upon the same tensors that are used in construction of nonlinear tensor functions. One consequence of the formulas derived is that the number of types of anisotropic elastic behaviors is ten. There is a long- …
Thermal And Electrical Properties Of Spark Plasma Sintered (Ti,Cr)B2 Ceramics,
2023
Missouri University of Science and Technology
Thermal And Electrical Properties Of Spark Plasma Sintered (Ti,Cr)B2 Ceramics, Steven M. Smith, Lun Feng, William Fahrenholtz, Gregory E. Hilmas, Laura Silvestroni
Materials Science and Engineering Faculty Research & Creative Works
Thermal and electrical properties were measured for TiB2 ceramics containing varying CrB2 contents up to 33 mol%. The room-temperature thermal diffusivity decreased with increasing Cr content from 0.330 ± 0.003 cm2/s for pure TiB2 to 0.060 ± 0.003 cm2/s for (Ti0.66Cr0.33)B2. The amount of anisotropy in the coefficients of thermal expansion increased with increasing Cr content and the c-axis had the greatest dependence on Cr addition, with an increase of more than 25% in the thermal expansion for 33 mol% CrB2 compared to TiB2, whereas the …
Wear Behavior Of In-Situ Oxide Dispersion Strengthened Fe-8ni Alloy With Zr Additions,
2023
Chulalongkorn University
Wear Behavior Of In-Situ Oxide Dispersion Strengthened Fe-8ni Alloy With Zr Additions, Mustafa Tekin, Faiz Muhaffel, Hasan Kotan, Murat Baydoğan
Journal of Metals, Materials and Minerals
In this study, in-situ oxide dispersion strengthened (ODS) Fe91Ni8Zr1 and Fe88Ni8Zr4 alloys were produced by combination of high energy mechanical alloying (HEMA) and high temperature equal channel angular extrusion (HT-ECAE). The wear behaviors of the consolidated samples were investigated under different loads from 1 N to 4 N by reciprocating wear tests at room temperature. The Scanning electron microscopy (SEM) was used to examine the wear tracks to analyze the wear characteristics as a function of applied loads. The relative comparison of the wear results showed that under the lower loads of 1 N and 2 N, Fe88Ni8Zr4 alloy has …
Examination Of The Adhesion Of The Scale Formed On Hot-Rolled Steel With Different Silicon Content Using A Tensile Test,
2023
Chulalongkorn University
Examination Of The Adhesion Of The Scale Formed On Hot-Rolled Steel With Different Silicon Content Using A Tensile Test, Seksan Singthanu, Prayoon Surin, Thanasak Nilsonthi, Manop Pipatthattakul
Journal of Metals, Materials and Minerals
In the hot-rolling process, steel was subjected to high temperatures which results in the formation of an oxide layer called scale. The oxide scale can be affected to the surface characteristic of the hot-rolled steel product. The scale must be completely removed from the surface of the steel before further processing. This research aimed to examine the adhesion behavior of scale on hot-rolled steel with different silicon contents (0.01, 0.12, 0.18, and 0.29 wt%) using a tensile testing machine with an observation setup. The results showed that the scale thickness decreased with increasing silicon content in the range of 9 …
Corrosion Of A Spark Plasma Sintered Fe-Cr-Mo-B-C Alloy In 3.5% Nacl Solution,
2023
Chulalongkorn University
Corrosion Of A Spark Plasma Sintered Fe-Cr-Mo-B-C Alloy In 3.5% Nacl Solution, Mudassir Farooq, Sohail Muhammad, A. A. Sorour
Journal of Metals, Materials and Minerals
In this study, the corrosion behavior of a Fe-Cr-Mo-B-C alloy, fabricated by spark plasma sintering of an amorphous alloy powder, in 3.5% NaCl solution was analyzed. Electrochemical impedance spectroscopy and potentiodynamic polarization are techniques which were used for electrochemical performance estimation of samples and the results were further compared with conventional alloys: 1080 carbon steel and 304 stainless steel. Corrosion surface products were characterized through Scanning electron microscopy, Energy dispersive x-ray spectroscopy and X-ray photoelectron spectroscopy. Specimens sintered at 800℃ (S1-800) had achieved 94% densification approximately while the sample sintered at 900℃ (S2-900), had densified more which was 98% approximately. …
Synthesis Of Zircon Pigments From Rice Husk Ash And Their Performance In Ceramic Glaze,
2023
Chulalongkorn University
Synthesis Of Zircon Pigments From Rice Husk Ash And Their Performance In Ceramic Glaze, Niti Yongvanich, Peerapat Soysom, Worachet Ratkasemsak
Journal of Metals, Materials and Minerals
ZrSiO4-based pigments have been known to be very stable in ceramic glazes but require a high firing temperature required for phase formation. This study examined the feasibility of using rice husk waste as a substitute for crystalline SiO2. The amorphous form of silica with some impurities was obtained by calcining the rice husk at 800℃. The general chemical formula were (Zr0.9M0.1)SiO4, where M = V, Pr, Fe and Cr. The solid-state processing was achieved by firing at 1300℃ for 12 h with NaF (5 wt%). X-ray Diffraction revealed a lower relative fraction between ZrO2 (secondary phase) and ZrSiO4 in the …
Investigation Of Surface Hardness And Roughness On Formability Of Aluminum Alloy Sheet Aa2024-T3 Subjected To The Shot Peening Process By Silica Shots,
2023
Chulalongkorn University
Investigation Of Surface Hardness And Roughness On Formability Of Aluminum Alloy Sheet Aa2024-T3 Subjected To The Shot Peening Process By Silica Shots, Jurarat Sawangpan, Sansot Panich, Tanakorn Jantarasricha, Anak Khantachawana
Journal of Metals, Materials and Minerals
Shot peening is one type of modified surface treatment that produces a residual compressive stress on the material subsurface and improves surface properties while generating plastic deformation on the surface. This research work aims to improve surface properties, which include the enhanced material formability of aluminum alloy 2024-T3 sheet having 1.2 mm of thickness, by providing residual compressive stress on the surface using the shot peening process, which uses silica particles of 0.1 mm in diameter. First, shot peening was performed using various process parameters: compressed air, distance from nozzle to target, and duration time. Based on the obtained peening …
Development Of Inexpensive Device For Methanol Detection In Hand Sanitizer Gel Using Manganese-Doped Zinc Sulfide Quantum Dots Modified By N-Methylpolypyrrole,
2023
Chulalongkorn University
Development Of Inexpensive Device For Methanol Detection In Hand Sanitizer Gel Using Manganese-Doped Zinc Sulfide Quantum Dots Modified By N-Methylpolypyrrole, Sophanat Khenthaphak, Pakorn Juleang, Wanida Wonsawat, Orawon Chailapakul, Eakkasit Punrat
Journal of Metals, Materials and Minerals
A method for methanol detection by an inexpensive device using a nanomaterial modified by N-methylpolypyrrole (NMPPY) has been developed. Manganese-doped zinc sulfide quantum dots (Mn/ZnS-QDs) were synthesized and then characterized by a fluorescence spectrophotometer to study their spectroscopic properties. Mn/ZnS-QDs were modified with NMPPy and studied by digital-image colorimetry to optimize conditions for methanol detection. A 2 mL of 3000 mg∙L–1 Mn/ZnS-QDs modified with 300 μL of 1000 mg∙L-1 of NMPPy was chosen to be a detecting reagent for methanol determination. Under the optimum conditions, the linear range was found to be 2%v/v to 50%v/v of methanol with R-square of …
Surface Modification Of Activated Carbon From Sago Waste,
2023
Chulalongkorn University
Surface Modification Of Activated Carbon From Sago Waste, Khaeriah Dahlan, Yane Oktovina Ansanay, Alda Filadelfi Runggaweri, Marlifon Merani
Journal of Metals, Materials and Minerals
In this paper, we analyzed the effect of surface modification on the surface properties of the active carbon from sago waste using varied oxidizers, namely H2O2, HNO3, and H2SO4. The ordinary active carbon has an initial surface area of 546.6 m2∙g-1, with a phenol and carboxylic functional group. The porosity, functional groups and morphological surface, together with the chemical composition of activated carbon were examined using a nitrogen adsorption-desorption through the Brunauer Emmett Teller (BET) method and the calculation of Barret-Joyner-Hall (BJH), a Fourier-transformed infrared spectroscopy, and a scanning electron microscopy with energy dispersive spectroscopy. The results found that the …
Impact Of Microwave Synthesis Time On The Shape Of Silver Nanostructures And Their Antibacterial Activity,
2023
Chulalongkorn University
Impact Of Microwave Synthesis Time On The Shape Of Silver Nanostructures And Their Antibacterial Activity, Nhat Hieu Hoang, Van Nghia Nguyen, Thi Tho Nguyen, Thi Mong Diep Nguyen
Journal of Metals, Materials and Minerals
Silver is a well-known effective antibacterial and disinfectant material with relatively few side effects. Nanosilver derived from it, have strong antibacterial, antifungal and broad-spectrum antiviral properties. This study describes how the microwave synthesis durations of silver nanoparticles affect their shape, and the effect of the shapes of these nanoparticles on their antibacterial activity. The optical properties of the nanosilver were examined through UV-Vis absorption spectroscopy. The morphology of the grain was determined by transmission electron microscopy (TEM), and the crystallinity of the nanosilver was confirmed by X-ray diffraction (XRD). The antibacterial activities were assessed using bacterial pathogens Bacillus cereus and …
Mechanical Behavior And Physicochemical Modifications In Lignosulfonate-Treated Fique (Furcraea Andina) Fibers,
2023
Chulalongkorn University
Mechanical Behavior And Physicochemical Modifications In Lignosulfonate-Treated Fique (Furcraea Andina) Fibers, Beatriz Dantas Lourenço Da Silva, Paula Lage Agrize, Betina Carvalho Veiga, Lucio Fabio Cassiano Nascimento, Camila Aparecida Abelha Rocha, Fábio De Oliveira Braga
Journal of Metals, Materials and Minerals
One of the most frequent problems in biocomposites is the physical/chemical incompatibility between natural lignocellulosic fibers (NLF) and the matrix. Physical and/or chemical treatments are the most common approach to improve interface properties. Seeking for environmentally friendly treatments, lignosulfonates (LSs) have been considered for surface modification of NLF due to their amphiphilic properties. Thus, the objective of the present work is to evaluate the influence of sodium LS (SLS) treatment protocols in the properties and mechanical behavior of fique (Furcraea Andina) fibers. X-ray diffraction (XRD), Thermogravimetric (TGA) and spectroscopic (FTIR) analyzes were performed, as well as optical microscopy, …
Thermal And Mechanical Evaluation Of Natural Fibers Reinforced Gypsum Plaster Composite,
2023
Chulalongkorn University
Thermal And Mechanical Evaluation Of Natural Fibers Reinforced Gypsum Plaster Composite, Tugba Mutuk, Kerem Arpacioğlu, Sevim Alişir, Gökhan Demir
Journal of Metals, Materials and Minerals
Many problems such as the increase in the world population, global drought, and greenhouse gases have caused materials used in industries to be reconsidered. This is how the concept of green composite material emerged. Using natural fibers to obtain such materials is important in terms of sustainability. This study is aimed to use hemp fiber and banana fiber as natural fiber additives in the gypsum composite to produce green bio-composite. Natural fibers are chemically modified with 5% NaOH solution. In this way, a good fiber/matrix interface interaction is provided. The composite hardness test result of 5 wt% HB fiber added …
Investigation Of Oxide Scale Adhesion On Hot-Rolled Steel Using The Tensile Test And Acoustic Emission,
2023
Chulalongkorn University
Investigation Of Oxide Scale Adhesion On Hot-Rolled Steel Using The Tensile Test And Acoustic Emission, Seksan Singthanu, Prayoon Surin, Manop Pipathattakul, Thanasak Nilsonthi
Journal of Metals, Materials and Minerals
This article addresses applying a tensile test with a CCD camera to assess scale adhesion on hot-rolled steel as a function of hot-rolled coil position. The scale adhesion in this study was shown in the value of the strain initiating the first scale spallation. The result of strain initiating the first scale spallation was confirmed with an acoustic emission (AE) method. The as-received hot-rolled coil was studied at the head, middle, and tail positions. A scanning electron microscope (SEM) and X-ray diffraction (XRD) were used to examine the scale morphology and phase identification respectively. The results show that the oxide …
Effect Of Nano Cdo-Zno Content On Structural, Thermal, Optical, Mechanical And Electrical Properties Of Epoxy Composites,
2023
Chulalongkorn University
Effect Of Nano Cdo-Zno Content On Structural, Thermal, Optical, Mechanical And Electrical Properties Of Epoxy Composites, Chaitra Srikanth, Gattumane Motappa Madhu
Journal of Metals, Materials and Minerals
Cadmium oxide doped zinc oxide nanoparticles were synthesized by solution combustion technique. CdO-ZnO nanoparticles were reinforced into epoxy by ultrasonication technique. CdO-ZnO nano-particles are well known semiconducting materials which are found to exhibit excellent semiconducting behavior even at high frequencies. Hence it was introduced into epoxy to study the semiconducting nature of CdO-ZnO/epoxy composites. The polymer composites exhibited interesting phenomenon such as minimum heat losses at high frequencies indicating semi-conducting behaviour of the composites. The polymer composite was also analysed for its structural, thermal, optical and mechanical properties. The enhanced interaction of CdO-ZnO nanoparticles with epoxy has resulted in superior …
Synthesis Of Zinc Oxide Photocatalysts From Zinc-Dust Waste For Organic Dye Degradation,
2023
Chulalongkorn University
Synthesis Of Zinc Oxide Photocatalysts From Zinc-Dust Waste For Organic Dye Degradation, Wanwalee Promsuwan, Pornapa Sujaridworakun, Wuttichai Reainthippayasaku
Journal of Metals, Materials and Minerals
Zinc-dust waste from a hot-dip galvanizing plant in the metal plating industry was successfully used as the starting material to synthesize zinc oxide (ZnO) nanopowder via a hydrothermal method. Effects of acid types in zinc-dust dissolving process and concentration of NaOH for precipitation on physical characteristics and photocatalytic activity of the synthesized ZnO were investigated. Elemental composition, phase and crystallite size, morphology with chemical composition, and specific surface area of the ZnO nanostructures were characterized by X-ray fluorescence spectroscopy (XRF), X-ray diffraction (XRD), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS), and gas adsorption-desorption analysis, respectively. The photocatalytic performance …
Investigations Of Structural Modifications, Physical And Optical Properties Of Lead Boro-Tellurite Glasses Doped With Europium Trioxide For Possible Optical Switching Applications,
2023
Chulalongkorn University
Investigations Of Structural Modifications, Physical And Optical Properties Of Lead Boro-Tellurite Glasses Doped With Europium Trioxide For Possible Optical Switching Applications, G. V. Jagadeesha Gowda, G. V. Ashok Reddy, Bheemaiah Eraiah, Chinnappa Reddy Devaraja
Journal of Metals, Materials and Minerals
This manuscript intends to the structural modifications, and physical and optical properties of a set of heavy metal alkali boro-tellurite glasses doped with Eu2O3. These glasses were produced by a conservative melt-quenching method. The existence of non-crystalline properties in the glasses was ascertained by X-ray diffraction analysis. The structural modifications were noticed by MAS-NMR spectroscopic investigation. Physical properties such as density, molar volume, oxygen packing density, average boron-boron separation, interionic distance, and polaron radius have been calculated by a suitable approach. The optical absorption studies were made through UV-visible absorption spectroscopy in the 350 nm to 800 nm wavelength range. …
The Influence Of Water-Cement Ratios And Alumino-Silicate Based Accelerator On The Properties Of Fiber-Reinforced Cement Composites,
2023
Chulalongkorn University
The Influence Of Water-Cement Ratios And Alumino-Silicate Based Accelerator On The Properties Of Fiber-Reinforced Cement Composites, Parinya Chakartnarodom, Passakorn Sonprasarn, Sureerat Polsilapa, Nuntaporn Kongkajun, Edward Laitila, Wichit Prakaypan
Journal of Metals, Materials and Minerals
Due to more strict environmental protection and greenhouse gas reduction, it is very important for all industries to appropriately manage their energy consumption. Fiber- reinforced cement composites are the popular building materials which consume enormous energy to intensify its chemical reaction during the autoclave steam curing process. Utilization of chemical admixture to replace the conventional energy-driven autoclave steam curing process will support the fiber- reinforced cement composites industry to develop sustainable building materials. In this research, typical and mechanical properties of the air-cured fiber- reinforced cement composites incorporated with alumino-silicate based accelerator were investigated. The results show an excellent correlation …
