Feedstock characterization with thermal gravimetric analysis (TGA) and scanning electron microscopy – Energy dispersive x-ray spectroscopy (SEM-EDX) of titanium alloy for metal injection molding technique

2020 ◽  
Author(s):  
F. Hidayanti ◽  
D. A. Pusparasmi ◽  
N. Lazuardi
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Titanium Alloy ◽  
Injection Molding ◽  
Thermal Gravimetric Analysis ◽  
Metal Injection Molding ◽  
Gravimetric Analysis ◽  
Thermal Gravimetric ◽  
X Ray ◽  
Scanning Electron

SB12 Assisted Synthesis of Nano CuO via Precipitation Method in Different Reaction Environments

2015 ◽  
Vol 749 ◽  
pp. 164-168
Author(s):  
Gamze Bozkurt ◽  
Ayşe Bayrakçeken Yurtcan ◽  
Abdulkadir Özer
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Cyclic Voltammetry ◽  
Precipitation Method ◽  
Gravimetric Analysis ◽  
Thermal Gravimetric ◽  
X Ray Diffraction ◽  
X Ray ◽  
Synthesis Procedure ◽  
Scanning Electron

In this study, CuO was synthesized via precipitation method by using Cu (CH3COO)2.H2O as precursor. KOH+NH3, KOH and NaOH were used as reactants and zwitterionic 3-(N,N-dimethyldodecylammonio) propane-sulfonate (SB12) as surfactant in the synthesis procedure. The samples were calcined at 500°C. All prepared CuO structures were characterized by X-ray diffraction (XRD), thermal gravimetric analysis (TGA), Fourier Transform Infrared (FTIR) spectra, and scanning electron microscopy (SEM) techniques. Electrochemical characterization was performed by cyclic voltammetry (CV). CuO showed different nanostructures according to the characterization results. Furthermore, electrochemical properties of the resulting structures were investigated. The specific capacitances of the CuO structures in different environments were determined by using CV technique in the order of: KOH+NH3>KOH>NaOH.

scholarly journals Sintesis Micro-Fibrillated Cellulose dari Serat Tandan Kosong Sawit dengan Hidrolisis Asam Oksalat

2020 ◽  
Vol 10 (01) ◽  
pp. 1
Author(s):  
Rizka Karima ◽  
Evana Yuanita ◽  
Bunda Amalia ◽  
Agustina Arianita ◽  
Tiara Mailisa ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Oxalic Acid ◽  
Microfibrillated Cellulose ◽  
Gravimetric Analysis ◽  
Thermal Gravimetric ◽  
X Ray ◽  
Empty Fruit Bunches ◽  
Hydrolysis Process ◽  
Scanning Electron

Tandan Kosong Sawit (TKS) merupakan limbah padat dari industri pengolahan kelapa sawit yang melimpah di Indonesia dan mengandung banyak selulosa. Microfibrillated cellulose (MFC) dapat diproduksi dari serat TKS. Tujuan dari penelitian ini adalah untuk mensintesis MFC dari serat TKS melalui proses alkalisasi,  pemutihan dan hidrolisis. TKS dicacah dan dihaluskan hingga berukuran 60 mesh untuk proses pembuatan pulp TKS. Proses alkalisasi dilakukan dalam reaktor menggunakan 4% NaOH pada suhu 90˚C selama 2 jam dan dilanjutkan dengan proses pemutihan mengunakan 20% H2O2 pada suhu kamar selama 2 jam. Kemudian proses hidrolisis dilakukan menggunakan asam oksalat 5% pada suhu 80°C selama 1 jam. MFC yang dihasilkan dianalisis menggunakan Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Difraction (XRD), Thermal Gravimetric Analysis (TGA) dan Field Emission Scanning Electron Microscopy (FESEM). Hasil analisis FTIR menunjukkan bahwa adanya penurunan kadar lignoselulosa yang dikonfirmasi juga oleh hasil uji kuantitatif kadar lignin. Hasil uji XRD menunjukkan peningkatan nilai kristalinitas. Hasil uji TGA menunjukkan hidrolisis menggunakan asam oksalat 5% dapat meningkatkan area degradasi termal dan hasil FESEM menunjukkan telah terjadi proses fibrilisasi serat dan penurunan diameter ukuran serat dari 400 µm menjadi 10 µm. Dari hasil penelitian ini, jika dilihat dari hasil kristalinitas, sifat termal dan ukuran diameter serat, proses hidrolisis menggunakan asam oksalat 5% adalah proses yang baik untuk pembuatan MFC dari serat TKS. Synthesis of Micro-Fibrillated Cellulose (MFC) from Oil Palm Empty Fruit Bunches (OPEFB) Fiber with Oxalic Acid HydrolysisAbstractOil Palm Empty Fruit Bunches (OPEFB), which is a solid waste from the palm oil processing industry, has a high availability in Indonesia, and it contains a lot of cellulose. Microfibrillated cellulose (MFC) can be produced from OPEFB fiber. This work’s objective was to synthesize MFC from fibers of OPEFB through the process of alkalization, bleaching process, and the hydrolysis process using an oxalic acid solution. The procedure began chopped fiber until 60 mesh, and alkalization process of pulping OPEFB in the reactor using 4% NaOH at the temperature of 90 ˚C for 2 hours. It continued with the addition of 20% H2O2 at room temperature for 2 hours. The hydrolysis process is carried out using an oxalic acid 5 % at temperature of 80°C for 1 hour. MFC was analyzed using Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD), Thermal Gravimetric Analysis (TGA), and Field Emission Scanning Electron Microscopy (FESEM). The FTIR analysis showed that the quantitative result also confirmed a decrease in lignocellulose content. XRD result showed an increase in the value of crystallinity. TGA results showed that hydrolysis using oxalic acid can increase the area of thermal degradation, and FESEM results showed there is a decreasing diameter of fiber from 400 µm to 10 µm. From the results of this study, when viewed from the results of crystallinity, thermal properties, and size of the fiber diameter, the hydrolysis process using 5% oxalic acid is a good process for making MFCs from TKS fibers.

Oxidation Behavior of Steel and Pure Copper at 500-700°C

2013 ◽  
Vol 421 ◽  
pp. 401-405
Author(s):  
Sang An Ha ◽  
Jei Pil Wang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Oxidation Behavior ◽  
Pure Copper ◽  
Thermal Gravimetric ◽  
X Ray Diffraction ◽  
X Ray ◽  
Composition And Structure ◽  
Gravimetric Apparatus ◽  
Scanning Electron

The oxidation behavior of steel and pure copper has been investigated in the temperature range of 500-700°C at various oxygen pressures. The rate of oxidation was measured using thermal gravimetric apparatus (TGA). The morphology, composition and structure of the oxide scale were determined by scanning electron microscopy (SEM) and X-ray diffraction (XRD).

Synthesis, characterisation and tribological evaluation of surface-capped molybdenum sulphide nanoparticles as efficient antiwear bio-based lubricant additives

2017 ◽  
Vol 69 (3) ◽  
pp. 378-386 ◽  
Author(s):  
Sharul Hafiq Roslan ◽  
Sharifah Bee Abd Hamid ◽  
Nurin Wahidah Mohd Zulkifli
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Wear Scar ◽  
Gravimetric Analysis ◽  
Content Type ◽  
X Ray ◽  
Lubricant Oil ◽  
Wear Reduction ◽  
Molybdenum Sulphide ◽  
Scanning Electron

Purpose The purpose of this study is to synthesise and characterise surface-capped molybdenum sulphide (SCMS) nanoparticles using the solvothermal method and to investigate their tribological behaviour towards friction improver and wear reduction for bio-based lubricant oil additives. Design/methodology/approach The design of the experiment was to use freshly prepared molybdenum (II) acetate, thioacetamide, fatty acid and hexane as the solvent inside an autoclave vessel which is heated at high temperature and pressure. Various types of fatty acids were used as the capping agent, such as caproic, lauric, stearic and oleic acid. The SCMS nanoparticles formed were characterized by Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray diffractometry, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy and thermal gravimetric analysis. These nanoadditives were then blended into pentaerythrityl tetracaprylate/caprate ester at 0.05 Wt.% concentration. The formulated bio-based lubricant oil samples were tested for viscosity, viscosity index (VI) and density based on standard method ASTM D445 and ASTM D2270. A four-ball test was carried out for determination of coefficient of friction and wear scar diameter. The wear scar formed on the surface of the ball bearing was analysed using scanning electron microscopy. Findings The characterisation results showed that SCMS nanoparticles were successfully formed with amorphous ball-like structure, and the presence of the capping layer surrounding the nanoparticles was confirmed. Then, the formulated bio-based lubricant oil with addition of nanoadditives displays improved tribological properties in term of VI, antifriction and wear reduction. Originality/value This research provides a synthesis method of producing SCMS nanoparticles using the organomolybdenum complex as the chemical precursor through the solvothermal reaction approach. Besides that, it also gives an alternative antifriction and antiwear nanoadditive for formulation of the bio-based lubricant oil.

Influences of Copper Complexes on the Properties of MAO Ceramic Coating on Titanium Alloy Surface

2014 ◽  
Vol 788 ◽  
pp. 138-143 ◽  
Author(s):  
Qiang Yao ◽  
Si Rong Yu ◽  
Hong Chao Chu
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Titanium Alloy ◽  
Copper Complexes ◽  
Ceramic Coating ◽  
X Ray Diffraction ◽  
X Ray ◽  
Aluminium Titanate ◽  
Black Coating ◽  
Scanning Electron

The present work focuses on the influence of copper complexes in the MAO electrolyte on the structure and wears resistance of ceramic coating on the surface of titanium alloy. The coatings composition and the morphologies were characterized using X-ray diffraction (XRD), energy dispersive spectroscopy (EDS) and scanning electron microscopy (SEM). It is shown that the working voltage of MAO reaction was lower after adding [Cu (NH3)4]2+than adding EDTA-Cu. The color of ceramic coating is black (prepared in the electrolyte with [Cu (NH3)4]2+) and brown (prepared in the electrolyte with EDTA-Cu). The black coating contained rutile TiO2, anatase TiO2and aluminium titanate (Al2TiO5), while the brown coating contained rutile and anatase only. The black coating which contained CuO compound was found to outperform brown coating in wear resistance.

The Utilization of Recycled Newspaper in the Production of Cellulose Microfiber

2016 ◽  
Vol 1133 ◽  
pp. 644-648 ◽  
Author(s):  
Mohamad Azuwa Mohamed ◽  
Wan Norharyati Wan Salleh ◽  
Juhana Jaafar ◽  
Ahmad Fauzi Ismail
Keyword(s):  
Electron Microscopy ◽  
Cost Effective ◽  
Gravimetric Analysis ◽  
Thermal Gravimetric ◽  
X Ray Diffraction ◽  
X Ray ◽  
Reinforcement Material ◽  
Cellulose Microfibers ◽  
Thermal Stability Of ◽  
Scanning Electron

Cellulose microfibers (CMF) were produced by utilizing recycled newspaper paper (RNP) as starting material. This approach is considered as green since recycling newspaper leads to the environment preservation and also cost-effective. The effect on the structural properties of cellulose produced at different stage of pretreatment were investigated by using Fourier transform infrared (FTIR), Scanning electron microscopy (SEM), X-ray diffraction (XRD) and Thermal gravimetric analysis (TGA). The FTIR and SEM demonstrate that the hemicellulose and lignin was successfully removed from the structure of the CMF. XRD and TGA results revealed that the different step of pretreatment was increased the crystallinity and thermal stability of CMF increased gradually. The improvement in CMF crystallinity has improved its thermal properties which is important in the field of reinforcement material.

scholarly journals Avaliação do bagaço de cana natural e modificado como potencial sorvente de óleo vegetal

2016 ◽  
Vol 11 (4) ◽  
pp. 129
Author(s):  
Viviane Vasques da Silva Guilarduci ◽  
Honória Fátima Gorgulho ◽  
Patrícia Benedini Martelli ◽  
Vanessa Soares dos Santos ◽  
William Graciliano Corrêa
Keyword(s):  
Electron Microscopy ◽  
Acetic Anhydride ◽  
Vegetable Oil ◽  
Sugarcane Bagasse ◽  
Gravimetric Analysis ◽  
Thermal Gravimetric ◽  
X Ray Diffraction ◽  
X Ray ◽  
Oily Water ◽  
Scanning Electron

O óleo e a gordura vegetal residual, utilizados para a preparação de alimentos representam um perigoso poluente para as águas de córregos e rios. Um dos métodos mais utilizados nas últimas décadas para limpeza da água oleosa é a aplicação de biossorventes, pois apresentam facilidade para remoção e recuperação do óleo. Neste sentido, o objetivo deste trabalho foi determinar a influência das modificações do bagaço de cana com anidrido acético (acetilação) e com 3-aminopropiltrietoxisilano (silanização) sob a sorção de óleo vegetal. A modificação das fibras foi avaliada pelas técnicas de espectroscopia no infravermelho com transformada de Fourier (FTIR), análise termogravimétrica (TG), difração de raios X, microscopia eletrônica de varredura (MEV) e análise de área superficial e porosidade. Os resultados obtidos indicaram maior sorção de óleo vegetal para o bagaço de cana modificado com anidrido acético (BCA), 667 mg.g-1, seguido pelo bagaço de cana sem modificação (BCN) com sorção de 576 mg.g-1. O bagaço de cana modificado com 3-aminopropiltrietoxisilano (BCS) apresentou menor sorção, 425 mg.g-1, o que foi atribuído à sua maior hidrofilicidade.Evaluation of natural and modified sugarcane bagasse as sorbent of vegetable oil Abstract: The oil and the residual vegetable fat, used for the preparation of foods represent a dangerous pollutant for the waters of streams and rivers. One of the most used methods in the last decades for cleaning the oily water is the application of biosorbents, since they are easy to remove and recover the oil. In this sense, the purpose of this work was to determine the influence of the modifications of sugarcane bagasse with acetic anhydride (acetylation) and with 3-aminopropyltriethoxysilane (silanization) under sorption of vegetable oil. The BCN and the grafted products were further characterized by FTIR spectroscopy, thermal gravimetric analysis, X-ray diffraction, scanning electron microscopy and analysis of surface area and porosity. The results showed higher sorption of vegetable oil for the acetic anhydride-modified sugarcane bagasse (BCA), 667 mg.g-1, followed by sugarcane bagasse without modification (BCN) with sorption of 576 mg.g-1. The cane bagasse modified with 3-aminopropyltriethoxysilane (BCS) presented lower sorption, 425 mg.g-1, which was attributed to its greater hydrophilicity.  

Facile Biomimetic Fabrication of Hollow Hydroxyapatite with Hierarchically Porous Microstructure Using Hyperbranched Gemini Surfactant as Template

2014 ◽  
Vol 1015 ◽  
pp. 355-358 ◽  
Author(s):  
Shan Li ◽  
Hua Hong Wu ◽  
Guo Jie Xu ◽  
Xiu Feng Xiao
Keyword(s):  
Electron Microscopy ◽  
Mass Fraction ◽  
Surfactant Concentration ◽  
Gemini Surfactant ◽  
Gravimetric Analysis ◽  
Thermal Gravimetric ◽  
X Ray ◽  
Porous Microstructure ◽  
Ft Ir ◽  
Scanning Electron

We successfully developed a facile synthetic way to 3D hollow HAp microspheres. We used Ca (NO3)2and (NH4)3PO4as materials, hyperbranched Gemini surfactant (PCD) as template.We used some techniques to characterize the products,such as X-ray powder diffraction (XRD), Fourier transform infrared spectroscope (FT-IR), Scanning electron microscopy (SEM) and Thermal gravimetric analysis (TG).The effects of the Gemini surfactant concentration on the morphology and crystal degree of the samples were analyzed.We proposed a possible growth of mechanism.The product morphology could vary from rod to hollow sphere by adjusting the template concentration.When the template concentration was low,ball-like hydroxyapatite preliminary formed.With increasing the template concentration,the crystal degree of products declined. While the spherical cluster composed of numbers of flake or needle architectures were appeared. The results show that when the mass fraction of template is 0.01%,we can product uniform well-defined hollow spherical hydroxyapatite with semidiameter about 1.5μm.

Identification of calcium oxalate crystals in dried or fixed tobacco leaf

1984 ◽  
Vol 42 ◽  
pp. 288-289
Author(s):  
Vicki L. Baliga ◽  
Mary Ellen Counts
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Calcium Oxalate ◽  
Growth And Development ◽  
Polarized Light ◽  
Calcium Oxalate Crystals ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Electron

Calcium is an important element in the growth and development of plants and one form of calcium is calcium oxalate. Calcium oxalate has been found in leaf seed, stem material plant tissue culture, fungi and lichen using one or more of the following methods—polarized light microscopy (PLM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and x-ray diffraction.Two methods are presented here for qualitatively estimating calcium oxalate in dried or fixed tobacco (Nicotiana) leaf from different stalk positions using PLM. SEM, coupled with energy dispersive x-ray spectrometry (EDS), and powder x-ray diffraction were used to verify that the crystals observed in the dried leaf with PLM were calcium oxalate.

Scanning Electron Microscopy and X-Ray Analyses of Dental Tissues from a Hibernator

1976 ◽  
Vol 34 ◽  
pp. 178-179
Author(s):  
M. L. Zimny ◽  
A. C. Haller
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Body Temperature ◽  
Ground Squirrel ◽  
Alveolar Bone ◽  
X Ray ◽  
Dental Tissues ◽  
Bone Minerals ◽  
Apical Tooth ◽  
Scanning Electron

During hibernation the ground squirrel is immobile, body temperature reduced and metabolism depressed. Hibernation has been shown to affect dental tissues varying degrees, although not much work has been done in this area. In limited studies, it has been shown that hibernation results in (1) mobilization of bone minerals; (2) deficient dentinogenesis and degeneration of alveolar bone; (3) presence of calculus and tears in the cementum; and (4) aggrevation of caries and pulpal and apical tooth abscesses. The purpose of this investigation was to study the effects of hibernation on dental tissues employing scanning electron microscopy (SEM) and related x-ray analyses.

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