scholarly journals Characterization of Microstructures and Tensile Properties of Recycled Al-Si-Cu-Fe-Mn Alloys with Individual and Combined Addition of Titanium and Cerium

Scanning ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Kang Wang ◽  
Peng Tang ◽  
Yi Huang ◽  
Yanjun Zhao ◽  
Wenfang Li ◽  
...  
Keyword(s):  
Tensile Properties ◽  
Optical Microscope ◽  
Distribution Factor ◽  
Secondary Phases ◽  
X Ray Diffraction ◽  
Strengthen Effect ◽  
Distribution Uniformity ◽  
Short Needle ◽  
Ti Addition

Individual and combined addition of Ti and Ce on the recycled Al-Si-Cu-Fe-Mn alloy was conducted. The microstructures and tensile properties of these fabricated alloys were investigated. In the case of Ti or Ce which was individually added, the added amount was ranging from 0.03 wt.% to 0.09 wt.%. The combined addition of Ti and Ce was set at the ratios of 1 : 1, 1 : 3, and 3 : 1 with a total amount of 0.12 wt.%. Microstructures and phases of these alloys were investigated by using an optical microscope, X-ray diffraction testing, and SEM coupled with EDS. The morphologies of these alloys were quantified by analyzing the SDAS value, length of secondary phases, and phases’ distribution uniformity. Tensile testing was carried out for understanding the strengthen effect of the modification process. Results show that the addition of Ce was favorable to the strength and % elongation because the coarse needle-like phase and the polyhedral phase were effectively refined. Their SDAS values and distribution factor were remarkably declined with the increase of the Ce level. The Ti addition could also refine the secondary phases and SDAS values. But its effect was not as prominent as the addition of Ce. Combined addition of Ti and Ce elements at the ratio of 1 : 3 resulted in the samples reaching maximum comprehensive tensile properties. In this case, the short needle-like phase was uniformly distributed in the microstructure. Few polyhedral phases could be found in the Al-Si-Cu-Fe-Mn matrix. The strengthening of these fabricated materials was due to the grain refinement for α-Al and modification for coarse secondary phases. In addition, distribution uniformity of secondary phases was also changed by their modification effects.

Investigations on Physical and Mechanical Characterization of the Joints Fabricated through Microwave Hybrid Heating Method

2021 ◽  
Vol 105 ◽  
pp. 25-41
Author(s):  
Parminder Singh ◽  
D.R. Prajapati ◽  
Shankar Sehgal
Keyword(s):  
Power Level ◽  
Dissimilar Materials ◽  
Hardness Test ◽  
Optical Microscope ◽  
X Ray Diffraction ◽  
Heating Method ◽  
Hybrid Heating ◽  
Microwave Hybrid Heating ◽  
Point Bend

This paper presents the current major research developments and growths in the area of microwave hybrid heating-based joining of similar and dissimilar materials. The study discusses on the different types of specimen materials, susceptor materials, fillers and microwave power level used by researchers for joining process. Comparative studies of joints using different parametric conditions are also mentioned. Physical characterization of joint has been investigated with optical microscope, scanning electron microscope, energy dispersive spectroscopy, electron probe micro analysis, X-ray diffraction and mechanically with hardness test, tensile test, 3-point bend test, impact test. Various methods for design of experiment and optimization are also used to obtain better results. Current study will facilitate the proper choice of input parameters for easy and good joints formation through the microwave hybrid heating method.

Effects of Extrusion on the Mechanical Properties and Damping Capacity of Mg-1.8Cu-0.5Mn Alloy

2007 ◽  
Vol 546-549 ◽  
pp. 257-260 ◽  
Author(s):  
Zhen Yan Zhang ◽  
Li Ming Peng ◽  
Xiao Qin Zeng ◽  
Lin Du ◽  
Lan Ma ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Properties ◽  
Room Temperature ◽  
Tensile Tests ◽  
Optical Microscope ◽  
Damping Capacity ◽  
X Ray Diffraction ◽  
Dynamic Mechanical Analyzer ◽  
X Ray ◽  
Solute Atoms

Effects of extrusion on mechanical properties and damping capacity of Mg-1.8wt.%Cu -0.5wt.%Mn (MCM1805) alloy have been investigated. Tensile tests and dynamic mechanical analyzer were respectively used to measure tensile properties and damping capacity at room temperature of as-cast and as-extruded MCM1805 alloy. The microstructure was studied using optical microscope, X-ray diffraction and scanning electron microscope with an energy dispersive X-ray spectrometer. Granato-Lücke model was used to explain the influences of extrusion on damping capacity of MCM1805 alloy. The results showed that extrusion dramatically decreases the grain size but has little influence on phase composition and solute atoms concentration of MCM1805 alloy, and the grain refinement was the dominant reason for the obvious increase of tensile properties and decrease of internal friction of MCM1805 alloy.

scholarly journals EFFECT OF Mn AND Ti ADDITION ON THE CRYSTALLOGRAPHIC STRUCTURE AND MAGNETIC PROPERTIES OF SrFe12O19

2020 ◽  
Vol 82 (4) ◽  
Author(s):  
Wisnu Ari Adi ◽  
Yunasfi Yunasfi ◽  
Yosef Sarwanto ◽  
Muhammad Aziz Majidi
Keyword(s):  
Magnetic Properties ◽  
Raw Materials ◽  
Site Occupancy ◽  
Crystallographic Structure ◽  
X Ray Diffraction ◽  
Mixed Powder ◽  
Total Magnetization ◽  
Multi Phase ◽  
Ti Addition

The synthesis and characterization of composition SrFe12-(x+y)MnxTiyO19 (x = y and x ≠ y) compound by using solid state reaction have been performed. The raw materials were SrCO3, Fe2O3, MnCO3, and TiO2. The mixed powder was compacted at 5000 psi into pellets and sintered at 1050°C in the air at atmosphere pressure for 15 hours and furnace cooling. The refinement results of x-ray diffraction pattern show that the doping composition (x = y) was a single phase while the doping composition (x ≠ y) was multi phase. We concluded that effect of substitution upon magnetic properties revealed that total magnetization, remanence and coercivity changed with substitution due to preferential site occupancy of substituted Mn2+ and Ti4+ ions. The coercivity decreases with increase in Mn and Ti concentration. This effect is related with Fe3+ magnetic moment changes after they have already substituted Mn2+ and Ti4+ ions. Since the coercivity and total magnetization may be controlled by substitution while maintaining resistive properties, making this material useful for microwave absorber. 

scholarly journals Processing and Characterization of BCZT-Modified BiFeO3-BaTiO3 Piezoelectric Ceramics

Crystals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1077
Author(s):  
Rizwan Ahmed Malik ◽  
Hussein Alrobei
Keyword(s):  
Domain Switching ◽  
Piezoelectric Sensor ◽  
Piezoelectric Ceramics ◽  
Secondary Phases ◽  
X Ray Diffraction ◽  
Solid State Method ◽  
Pure Perovskite Structure ◽  
Optimized Conditions ◽  
Domain Alignment

The synthesis of non-lead piezoelectric ceramics (1–z)(0.65Bi1.05Fe2O3-0.35BaTiO3)-z Ba(Ti0.8Zr0.2)O3-(Ba0.7Ca0.3)TiO3 using a solid state method and a quenching strategy was investigated. The processing conditions such as the sintering temperature and soaking time were optimized. The patterns of X-ray diffraction (XRD) displayed a pure perovskite structure with no secondary phases. The ferroelectric and piezoelectric characteristics of the samples were considerably improved as a result of the lattice strain. The findings of the experiment revealed that the quenching technique increases the piezoelectric sensor constant of 152 pC/N in optimized conditions. The enhanced piezoelectric sensor constant (d33) value at z = 0.020 was ascribed to the incorporation of multi-cationic BCZT, which modified the bond lengths at a unit cell level and gave rise to more flexibility in complex domain switching. This facilitated easier domain alignment in response to the applied field and resulted in an improvement in the electrical properties.

Characterization of Composite Based on Al–Cu–Co Alloy

2012 ◽  
Vol 186 ◽  
pp. 226-229
Author(s):  
Włodzimierz Bogdanowicz ◽  
Jacek Krawczyk ◽  
Robert Albrecht
Keyword(s):  
Optical Microscope ◽  
Quasicrystalline Phase ◽  
X Ray Diffraction ◽  
The Matrix ◽  
Light Optical Microscope ◽  
Electron Microscopes ◽  
T Phase ◽  
Laue Method ◽  
Quasicrystal Structure

Composite based on Al–Cu–Co alloy obtained by directional solidification, were characterized. The quasicrystalline decagonal D phase of Al64Cu20Co16 was the reinforcement and the singlecrystalline tetragonal T phase of Al72Cu27Co1 was the matrix of the composite. The phases were identified by powder X-ray diffraction (XRD). The composite was analysed by light optical microscope and electron microscopes. The SEM and TEM techniques were used. Additionally the Laue method was used. The results of the study showed that the reinforcement has a form of parallel fibres of 20-40 μm diameter. Quasicrystal structure of fibres contained the phason strain. The quasicrystalline phase in the form of decagonal columns was also present inside composite pores.

Characterization of Gamma Irradiated Isotactic Polypropylene by Mixtures of Hindered Amine/Organo-Phosphite Stabilizers

2013 ◽  
Vol 457-458 ◽  
pp. 297-300
Author(s):  
Min Li ◽  
Li Guang Xiao ◽  
Hong Kai Zhao
Keyword(s):  
Tensile Properties ◽  
Isotactic Polypropylene ◽  
Radiation Doses ◽  
Wide Angle ◽  
X Ray Diffraction ◽  
Γ Irradiation ◽  
X Ray ◽  
Β Phase ◽  
Gamma Irradiated

In this work, the effect of γ-irradiation on neat polypropylene (PP) and PP with the stabilizers have been studied by means of wide-angle X-ray diffraction (WAXD) and tensile properties. There is a new reflex 300, β-phase, appeared in irradiated neat PP sample, compared with non-irradiated neat PP sample. When T/S ratio are 0.1 wt%/0.1 wt% and 0.1 wt%/0.3 wt% of PP, the reflex 300 of irradiated PP with different radiation doses all increased. However T/S content is 0.1 wt%/0.5 wt% of PP, the reflex 300 is not appeared. Among the samples which contain stabilizers, the stabilization of PP against γ-irradiation increased, compared with neat PP.

Synthesis and Characterization of a New Organometallic Palladium Coordinated Liquid Crystal

2010 ◽  
Vol 428-429 ◽  
pp. 117-121 ◽  
Author(s):  
Jian Qiang Liu ◽  
Xing Cheng Zhang ◽  
You Yong Dai ◽  
Hong Di Xiao ◽  
Shi Shen Yan ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Optical Microscope ◽  
Resonance Spectroscopy ◽  
Functional Material ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Liquid Crystallinity ◽  
New Type ◽  
Clearing Temperature

A new organometallic palladium coordinated liquid crystal that is written by PdS4 has been synthesized by chelating reaction of the tetrachloropalladate (PdCl42-) and the star-like liquid crystal (S4) containing four butoxyazobenzene mesogens in its periphery. The structure and liquid crystallinity (LC) of PdS4 were characterized by infrared absorption spectroscopy (IR), ultraviolet absorption spectra (UV), nuclear magnetic resonance spectroscopy (NMR), elemental analysis (EA), polarizing optical microscope (POM), X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The phase behavior of PdS4 is Cr167N232I200N170Cr, its melting point and clearing temperature are higher than those of the free azo ligand S4, its mesophase range is broader than S4’s. It will be used as a new type photoelectric functional material in the future.

scholarly journals Wear Characterization of Al/ B4C surface composite produced by TIG arc process

2018 ◽  
Vol 3 (2) ◽  
pp. 01-05
Author(s):  
N. Yuvaraj ◽  
Keyword(s):  
Optical Microscope ◽  
X Ray Diffraction ◽  
Wear Properties ◽  
Composite Surface ◽  
X Ray ◽  
Surface Composite ◽  
Surface Composites ◽  
Scanning Electron ◽  
Wear Characterization

Aluminum-based surface composites were fabricated by the TIG arc process. B4C micro and nanoparticles were filled separately on the grooves of the Aluminum substrate and modified the surfaces with different TIG arc speeds. The modified composite surface was characterized by optical microscope, Scanning Electron microscope, and X-ray diffraction. The microhardness and wear properties of the composite surface were evaluated. The results of this study revealed that the newly formed nanocomposite surface enhances the hardness and wear characteristics. The wear worn-out surfaces of the composite surface were analyzed through SEM studies in order to understand the wear mechanisms

Solubility of Mn in ZnO Nanocrystallites using Wet Chemical Synthesis

2019 ◽  
Vol 2 (1) ◽  
pp. 53-61
Author(s):  
Esau Abekah Armah ◽  
Francis Kofi Ampong ◽  
Martin Egblewogbe ◽  
Hubert Azoda Koffi ◽  
Francis Boakye ◽  
...  
Keyword(s):  
Synthesis Method ◽  
Magnetic Semiconductor ◽  
Solubility Limit ◽  
Secondary Phases ◽  
X Ray Diffraction ◽  
Phase Synthesis ◽  
Wet Chemical Synthesis ◽  
Wet Chemical ◽  
Binary Compounds

There is a substantial amount of literature dealing with many aspects of synthesis and characterization of pure and doped binary compounds including Mn-doped ZnO which has been widely studied due to its superb properties as a dilute magnetic semiconductor (DMS). Aspects concerning doping limits for these compounds is an important stage in the search for new materials. Samples of Zn1-xMnxO nanocrystal were synthesized at temperatures of 180 °C and 200 °C using wet or liquid phase synthesis method. Dopant concentrations x=0.5, 1, 1.5, 2, 2.5, 5, 10, 20, 30, 40 and 50 per cent were studied. Powder x-ray diffraction (PXRD) patterns of the samples were analyzed with a view to determining the onset of secondary phases and hence the solubility limit of the dopant. The solubility limit for Mn in ZnO samples synthesized at temperature of 200 °C is realized at x <20%. For samples synthesized at temperature of 180 °C, the solubility limit is x <0.5%.

Process Optimization and Structural Characterization of Fe3Si Layer by Pulse Electrodeposition

2010 ◽  
Vol 129-131 ◽  
pp. 1201-1205 ◽  
Author(s):  
Hai Li Yang ◽  
Ai Min Gao ◽  
Yu Zhu Zhang ◽  
Yun Gang Li ◽  
Guo Zhang Tang ◽  
...  
Keyword(s):  
Single Phase ◽  
Deposition Time ◽  
Optical Microscope ◽  
X Ray Diffraction ◽  
Cross Sectional ◽  
Gradient Distribution ◽  
X Ray ◽  
Compositional Depth Profile ◽  
Equiaxed Grains

Fe3Si layer was prepared by pulse eletrodeposition of Si on the surface of non-oriented steel in molten salts. With an orthogonal test the optimal process parameters were determined: the formulation of salts was NaCl:KCl:NaF:SiO2=1:1:3:0.3(mole ratio), current density of 60 mA/ cm2, duty cycle of 30%, pulse period of 1000 s and a deposition time of 50 min, respectively. The compositional depth profile, the structure, the surface morphology and cross sectional micrograph of the layer were studied by glow discharge spectrometry (GDS), X ray diffraction (XRD), scanning electron microscopy (SEM) and optical microscope (OM). The results showed that Si in the layer existed in the form of the gradient distribution. The phase structure of the layer was composed of the single-phase Fe3Si. The layer composed of equiaxed grains. The surface appeared smooth and dense, and with uniform thickness.

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